Praveen Kumar PANDEY

Publications

• Integrated Management of Chickpea Wilt incited by Fusarium oxysporum f. sp. ciceri

  Ainmisha, S. Zacharia, K.K.Jaiswal, Praveen Pandey

  International Journal of Agricultural Research. 05/2012;
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  Response of Organic and Inorganic Fertilizers on Nutrient and Protein content in Barley (Hordeum vulgare L.)

  K.N.Rai, A.K.Sachan, T.N. Rai, P.Pandey

  Journal of Plant Nutrition and Soil Science. 01/2012;

  The micro pot experiment was conducted to know the effect of organic and inorganic fertilizers on nutrient uptake and protein content in Barley. The highest uptake of these nutrients were computed in N80, P50, K50, S40, Zn5 kg ha-1 with FYM 5 ton ha-1 (T5) and lowest in absolute control in different... [more] The micro pot experiment was conducted to know the effect of organic and inorganic fertilizers on nutrient uptake and protein content in Barley. The highest uptake of these nutrients were computed in N80, P50, K50, S40, Zn5 kg ha-1 with FYM 5 ton ha-1 (T5) and lowest in absolute control in different cultivars of barley. The contents and uptake of all the nutrients increased with an increase in graded levels of fertilizers with integration of FYM. On an average highest protein content were recorded with combination of FYM 5 t ha-1 along with graded levels of nutrients i.e. N80, P50, K50, S40, Zn5 kg ha-1 with FYM 5 ton ha-1 (t5) were found highest 19.88% in Haritima V1 and 20.51% in Azad v2 in comparison to lowest protein contents were recorded in absolute control. Similarly, without integration of FYM highest protein content 14.77% was observed in Haritima V1 and 17.70% in Azad v2 in comparison to control (T1). The integrated use of nutrients also significantly increased protein content in grains of Barley. It can be inferred that highest nutrient uptake and protein content in barley cultivars could be achieved with integrated use of organic manure (FYM) and inorganic fertilizers N, P, K, S and Zn. The treatment N80 P50 K50 S40 Zn5 kg ha-1+FYM @ 5 t ha-1 came out to be best dose for maximum yield, nutrient uptake and protein content.
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  Assessment of Genetic Diversity for Various Quantitative Traits in Exotic Rice Genotypes under Saline soil

  V.R. Pandey, P.K. Singh, P. Pandey

  Australian Journal of Crop Science. 01/2012;

  The nature and magnitude of genetic diversity was assessed in fifty two exotic rice genotypes under salt affected soil during wet season of 2009. The analysis of variance revealed highly significant differences for all the characters under studied, indicating that there is ample scope for isolation ... [more] The nature and magnitude of genetic diversity was assessed in fifty two exotic rice genotypes under salt affected soil during wet season of 2009. The analysis of variance revealed highly significant differences for all the characters under studied, indicating that there is ample scope for isolation of promising lines from present gene pool. Based on Mahalanobis D2 statistics the genotypes were grouped into seven distinct non-overlapping clusters indicated existence of high degree of genetic diversity in the materials. Cluster VII, containing 12 genotypes, emerged with highest number of genotypes, while cluster I with five genotypes contained least number of entries. However, cluster IV and cluster II were represented by nine and eight entries, respectively while cluster III, V and VI comprised of six lines each. The clustering patterns specify lack of parallelism between genetic diversity and geographic origin as lines developed at same place or geographic region were scattered in distinct clusters. The highest inter-cluster distance was observed in cluster I and II, followed by cluster I and VI, cluster III and VII, cluster I and IV and cluster I and V. Comparison of cluster means of cluster I and II showed that these two clusters had contrasting low or high means for various characters. Therefore, crosses between diverse genotypes belonging to clusters separated by high inter-cluster distances with desired means are likely to produce transgressive segregants may be advocated for developing high yielding rice varieties suitable for salt-affected soil.

• Inter-Relationship and Path coefficient Estimation in Rice under Salt Stress Environment

  V.R. Pandey, P.K. Singh O.P. Verma, P. Pandey

  International Journal of Agricultural Research. 01/2012;

  Present experiment was undertaken with fifty two rice genotypes showing wide spectrum variation to study mutual relationship, cause and effects of various quantitative traits on yield and its components under salt affected soil. Results showed that substantial amount of variability exists in the ent... [more] Present experiment was undertaken with fifty two rice genotypes showing wide spectrum variation to study mutual relationship, cause and effects of various quantitative traits on yield and its components under salt affected soil. Results showed that substantial amount of variability exists in the entire gene pool for all traits studied validated ample scope of selection. High estimates of heritability coupled with high genetic advance in per cent of mean were observed for biological yield per plant, grain yield per plant, spikelets per panicle and flag leaf area while, the 1000-grain weight and harvest-index suggesting preponderance of additive gene action in the expression of these characters. Grain yield per plant exhibited a very strong positive association with biological yield per plant, flag leaf area and spikelet fertility at phenotypic and genotypic level which indicated that these traits were the strongest associates of grain yield per plant. Path analysis identified harvest-index, days to maturity, and effective tillers per plant, 1000-grain weight, and flag leaf area and panicle length as major direct contributors. Further, the occurrence of negative as well as positive indirect effects by yield components on grain yield via one or other character simultaneously, presents a complex situation where a compromise is required to attain proper balance of different yield components in determining rice ideotype for high grain yield under salt stress.

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• Nature of Gene action and Combining ability in Rice.

  D. K. Tiwari, Praveen Pandey, S.P. Giri, J.L. Dwivedi

  Oryza. 01/2012;

  The present study was undertaken with a fixed effect model i.e. line x tester mating design involving 3 CMS line (female) and 20 elite genotypes (Male) of rice to identify heterotic combinations expressing high hybrid vigour. On the basis of overall performance the male lines, IR 35454-18-1-1-2R fol... [more] The present study was undertaken with a fixed effect model i.e. line x tester mating design involving 3 CMS line (female) and 20 elite genotypes (Male) of rice to identify heterotic combinations expressing high hybrid vigour. On the basis of overall performance the male lines, IR 35454-18-1-1-2R followed by IET 201108 and IR 52256-9-2-2-1R were identified as most promising parents due to having good general combining ability for grain yield and almost all its major components. Out of 60 crosses, about 30% crosses showed significant and desirable sca effects for grain yield along with its three important traits, viz., number of fertile spikelets, number of spikelets per panicle and biological yield. The crosses NMS 4A x IR 633-76-1R, IR 58025A x IR 19058-107-1R, IR 58025A x IR32419-28-3-1-3-3R, NMS 4A x IR35454-18-1-1-2R and NMS 4A x IR 5226-9-2-2-1R exhibited high estimates for parents and good sca effects, hence, it may be considered for hybrid breeding programme. The higher magnitude of sca than gca variance, greater values of average degree of dominance and lower predictability ratio was observed in all characters studied. This suggested significant role of non-additive gene action which resulted from dominance, over dominance, epistatic and various other interaction effects. Results on gene action and combining ability indicated that both general and specific combining ability effects are important but predominance of non-additive genetic variance indicated the presence of heterozygosity in the population. As such this type of genetic variance is non-fixable hence; heterosis breeding is effective for crop improvement.

• Diallel analysis for heterosis and combining ability in bread wheat (Triticum aestivum L. em. Thell.)

  Kundan Jaiswal, Shailesh Marker, Praveen Pandey Binod Kumar, Alankar Verma

  Indian Journal of Agricultural Research. 01/2012;

  Heterosis and combining ability in wheat were conducted on 15 F1 hybrids along with six parents to know the pattern of inheritance of some morphological traits for selecting superior genotypes. The experiment was carried out according to diallel mating design, during Rabi 2008-09. The Analysis was m... [more] Heterosis and combining ability in wheat were conducted on 15 F1 hybrids along with six parents to know the pattern of inheritance of some morphological traits for selecting superior genotypes. The experiment was carried out according to diallel mating design, during Rabi 2008-09. The Analysis was made following the Griffing’s method and gene action estimated utilizing Hayman’s method. The parent viz.; K-8962, HUW 510 and Sonalika were identified as most promising parents due to having good general combining ability for grain yield and almost all its major components. Among the crosses significant and desirable sca effects in order of merit yield and yield contributing traits were Kalyansona x K 8962, Sonalika x K 8962 and HUW 510 x Sonalika. Highly significant heterosis was found for spike length in cross Sonalika x K-8962, tillers per plant in cross HUW 510 x K-8962, number of grains per spike in cross Sonalika x K-8962, test weight in cross PBW 373 x Kalyansona and harvest index in cross Kalyansona x K-8962. Results on gene action indicated that both additive and non-additive gene effects are importance in the inheritance of most of the traits. It can be concluded that the heterosis estimates over mid-parent in the crosses were more frequent for days to flowering, plant height, spike length, number of tillers per plant, grains per spike, test weight and harvest index. Therefore, these crosses could be utilized for further selection of high yielding progenies to achieve a quantum jump in wheat improvement.

• Estimation of combining ability in diallel crosses of wheat (Triticum aestivum L.)

  K. K. Jaiswal, S. Marker, Praveen Pandey, Binod Kumar

  Indian Journal of Agricultural Research. 01/2012;

  Combining ability of some polygenic traits was studied in a set of diallel crosses involving six wheat genotypes to know the inheritance pattern of yield attributes. The analysis was made following the Griffing’s method further, gene action and combining ability estimated utilizing the method of Hay... [more] Combining ability of some polygenic traits was studied in a set of diallel crosses involving six wheat genotypes to know the inheritance pattern of yield attributes. The analysis was made following the Griffing’s method further, gene action and combining ability estimated utilizing the method of Hayman. Results on gene action and combining ability indicated that both additive and non-additive gene effects are important in the inheritance of most of the traits. Single seed descent method can be applied to exploit additive gene effects whereas non-additive gene effects could be valuable in hybrid wheat breeding programs. The parent viz.; K-8962, HUW-510 and Sonalika were identified as most promising parents due to their good general combining ability for grain yield and almost all its major components. Among the crosses significant and desirable sca effects based on its performance for yield and yield contributing traits were Kalyansona x K-8962, Sonalika x K-8962 and HUW-510 x Sonalika. Therefore, these crosses could be utilized for further selection of high yielding progenies to achieve a considerable increase in wheat yield.

• Heterosis Studies for Yield and its Components in Rice Hybrids using CMS system

  Tiwari D.K, Pandey P, Giri S.P, Dwivedi J.L

  Asian Journal of Plant Sciences. 01/2011;

  Realizing the potential of hybrid rice to increase productivity, the present experiment was undertaken with a fixed model i.e. line x tester mating design involving 3 CMS lines and 20 elite restorers to identify the best heterotic combination. The results indicated that the manifestation of heterobe... [more] Realizing the potential of hybrid rice to increase productivity, the present experiment was undertaken with a fixed model i.e. line x tester mating design involving 3 CMS lines and 20 elite restorers to identify the best heterotic combination. The results indicated that the manifestation of heterobeltiosis for grain yield was significantly superiority of 43 hybrids ranging from 11.63 to 113.04% and 46 hybrids over standard variety (Sarjoo-52) ranging from 10.48 to 71.56%. Most of the crosses which exhibited superiority over better parent or standard variety for grain yield also showed significant heterosis for number of fertile spikelets and number of spikelets per panicle. These crosses also possessed about 80% pollen viability. Besides grain yield, considerable heterosis was observed for other characters also but its degree varied from character to character. The best cross combination in order of merit grain yield and other yield components were IR58025AxIR48749-53-2-2-2R, NMS4AxIR633-76-1R, IR58025AxIR54853-43-1-3R, IR58025AxIR19058-107-1R and PMS10AxIR54853-43-1-3R. Considering the heterosis more than 60% as well as significant sca effects for major components, the NMS4AxIR633-76-1R, IR58025AxIR19058-107-1R and IR58025AxIR32419-28-3-1-3R were most promising combinations and need to be tested on large scale. Besides these, some other crosses viz., NMS4AxIR52256-9-2-2-1R, NMS4AxIET 9352 and IR58025AxIET201102, which expressed more than 50% heterosis along with desirable significant sca effects for more than six important yield components, may be considered for commercial exploitation.

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• Studies on genetic variability for yield components in rice (Oryza sativa L.)

  Dinesh K. Tiwari, Praveen Pandey, Sachchidanand Tripathi, S. Prasad Giri, Jawahar L. Dwivedi

  Advances in Agriculture & Botanics. 01/2011; 3:76-81.

  The present experiment comprised with 3 CMS lines (viz IR58025A, NMS4A and PMS10A) and 20 diverse genotypes were crossed in a line x tester mating design to identify suitable parents for heterosis breeding. The analysis of variance revealed that for treatments, parents, crosses and parents vs. cross... [more] The present experiment comprised with 3 CMS lines (viz IR58025A, NMS4A and PMS10A) and 20 diverse genotypes were crossed in a line x tester mating design to identify suitable parents for heterosis breeding. The analysis of variance revealed that for treatments, parents, crosses and parents vs. crosses are highly significant for various characters under studied i.e. days to 50% flowering, effective tillers per plant, panicle length, number of spikelets per panicle, number of fertile spikelets, spikelet fertility percent, grain yield per plant, 100 grain weight, biological yield, harvest index except due to crosses for 100 grain weight. The higher magnitude of PCV and GCV was recorded for 100 grain weight, grain yield per plant, number of fertile spikelets, pollen fertility percent, effective tillers per plant, panicle length, number of spikelets per panicle and harvest index. All the characters showed high broad sense heritability, while in narrow sense estimates were higher for biological yield, spikelet fertility percent and number of fertile spikelets and moderate for most of traits except effective tillers per plant and panicle length. High heritability coupled with high genetic advance was recorded for number of fertile spikelets, spikelet fertility percent and pollen fertility percent indicated the major role of additive gene action in the inheritance of these characters. Thus, these characters may serve as an effective selection parameter during breeding programme.

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• Relationship Between Some Morphological and Physiological Traits with Grain Yield in Bread Wheat (Triticum aestivum L.em.Thell.)

  S.N. Tripathi, Shailesh Marker, Praveen Pandey, K.K. Jaiswal, D.K. Tiwari

  Trends in Applied Sciences Research. 01/2011; 6:1037-1045.

  The better way of exploiting genetic association with several traits having high heritability is to construct a selection index that combines information on all the characters which are having decisive role in influencing the yield. Therefore, an experiment consisting thirty wheat genotypes was grow... [more] The better way of exploiting genetic association with several traits having high heritability is to construct a selection index that combines information on all the characters which are having decisive role in influencing the yield. Therefore, an experiment consisting thirty wheat genotypes was grown in a randomized block design with three replications during Rabi 2007-08 to determine mutual relationship between various yield components in bread wheat. The mean performance of individual genotypes was employed for analysis of variance to test the significance for each character. The higher genotypic and phenotypic coefficients of variation were exhibited by harvest index, biological yield per plant, number of productive tillers per plant, test weight and grain yield per plant. The role of additive gene action was observed in the expression of the character like plant height, grain yield per plant, biological yield, harvest index and test weight. The correlation coefficient between grain yield per plant and other quantitative attributing to yield showed that grain yield was positively associated with plant height, spike length, number of grains per spike and test weight and biological yield. Path coefficient at genotypic level revealed biological yield had the highest direct positive effect on seed yield per plant followed by harvest index, days to maturity, test weight, spike length and number of productive tillers per plant, indicating these are the main contributors to yield.

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• Genotype x Environment Interaction and Stability Analysis in Elite Clones of Sugarcane (Saccharum officinarum L.).

  D.K.Tiwari, P. Pandey, R.K. Singh, S.P. Singh, S.B. Singh

  International Journal of Plant Breeding and Genetics. 01/2011; 5:93-98.

  The present investigation was undertaken to identify the stable cultivars across different environmental condition. Sixteen early maturing and elite genotypes of sugarcane were evaluated for their adoptability in respect of cane yield and its components for three years from 2004-2007 under two plant... [more] The present investigation was undertaken to identify the stable cultivars across different environmental condition. Sixteen early maturing and elite genotypes of sugarcane were evaluated for their adoptability in respect of cane yield and its components for three years from 2004-2007 under two plant and one ratoon crops. The stability of genotypes was estimated by using the method of Eberhart and Russell (1966). In this analysis sum of square due to G x E were portioned into individual genotypes (X-i), regression of environmental means (bi) and deviation from regression (S2d).The regression coefficients (bi) and mean square deviation from regression S2d) were used to define genotype stability. Significantly mean square differences among Genotypes x Environment for all the characters were observed, this is indication of significant variability among the experimentation. The mean square due to G x E were significant for NMC, length of internode, sucrose % in juice and CCS%. Higher mean values for sucrose percent in juice were found in the genotypes CoS05263, CoS05249 and CoS05259 was superior to others. The stability parameters for NMC, cane yield , sucrose % and CCS% shown by the genotype CoJ64 compared to UP05233, CoS05266, CoS05260, CoS05276 and CoS05263 indicated better adoption and less sensitive to environmental changes From the present study it is concluded that for cane yield and sucrose % in juice in UP05233 and CoS05263 performance better then rest of elite genotypes study due to having high mean values of genotype over all three environments. Therefore, these genotypes may be commercially cultivated over a wide range of environments.

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• Effect of GA3 and other Plant Growth regulators on hybrid rice seed production.

  D.K.Tiwari, P. Pandey, S.P.Giri, J.L.Dwivedi

  Asian Journal of Plant Sciences. 01/2011; 10:133-139.

  The aim of the present investigation is to identify a suitable and cost efficient substitute of Gibberellic acid to enhance hybrid rice seed production. The experimental material comprising both the parental lines of hybrid NDHR2 i.e. IR58025A and NDR3026-3-1R were treated with 34 treatment combinat... [more] The aim of the present investigation is to identify a suitable and cost efficient substitute of Gibberellic acid to enhance hybrid rice seed production. The experimental material comprising both the parental lines of hybrid NDHR2 i.e. IR58025A and NDR3026-3-1R were treated with 34 treatment combination of different growth regulators and one untreated check were grown in randomized block design with three replications. The results indicated that the analysis of variance was significant for all the characters except plant height and effective tillers per plant. The exogenous application of various plant growth hormones significantly increases seed yield with a range of 14.85 g to 23.54 g. The treatment T26 i.e. GA3 (45 g) + C.C had highest significant increase in yield followed by T2 (GA3 45 g), T1 (GA3 30 g), T5 (NAA 200 g), T3 (NAA 100 g), T27 (Urea 2 g + C.C.) and T24 (GA3 45 g + K2PO4 2 g). Remarkable increase in other growth and yield components was also observed with the foliar application of various plant growth regulators. It is concluded that treatment combination T26 (GA3 45 g+ Urea 10g + Boric acid 2g + ZnSO4 + K2 PO4 2g) gave best results and could be used to enhance hybrid rice seed production and substitute of GA3 in India as well as other hybrid rice growing countries.

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• Prediction of Gene action, Heterosis and Combining ability to Identify Superior Rice Hybrids

  D.K.Tiwari, P.Pandey, S.P.Giri, J.L.Dwivedi

  International Journal of Botany. 01/2011; 7:126-144..

  Nature of gene action and combining ability is valuable in determining whether heterosis is fixable or predictable. Thus, to know the inheritance pattern of some morphological traits sixty F1 hybrids along with their parents (3 CMS lines and 20 restorer variety) were evaluated to identify best heter... [more] Nature of gene action and combining ability is valuable in determining whether heterosis is fixable or predictable. Thus, to know the inheritance pattern of some morphological traits sixty F1 hybrids along with their parents (3 CMS lines and 20 restorer variety) were evaluated to identify best heterotic combinations. The results indicated that the male lines i.e.; IR35454-18-1-1-2R, IET201108 and IR52256-9-2-2-1R were identified good general combiner for grain yield and almost all its major components. The higher magnitude of sca than gca variance, greater values of average degree of dominance and lower predictability ratio was observed in all characters studied suggested significant role of non-additive gene action. Out of 60 crosses, about 30% crosses showed significant and desirable sca effects for grain yield along with its important traits, viz., number of fertile spikelets, number of spikelets per panicle and biological yield. High sca effects was observed in the crosses NMS4A x IR633-76-1R, IR58025A x IR19058-107-1R, IR58025A x IR32419-28-3-1-3-3R, NMS4A x IR35454-18-1-1-2R and NMS4A x IR5226-9-2-2-1R. Manifestation of heterobeltiosis for grain yield was significantly superiority of 43 hybrids ranging from 11.63 to 113.04% and 46 hybrids over standard check (Sarjoo-52) ranging from 10.48 to 71.56%. Most of the crosses which exhibited superiority over better parent or standard variety for grain yield also showed significant heterosis for number of fertile spikelets and number of spikelets per panicle. The best cross combination IR58025A x IR48749-53-2-2-2R, NMS4A x IR633-76-1R, IR58025A x IR54853-43-1-3R, IR58025A x IR19058-107-1R and PMS10A x IR54853-43-1-3R, NMS4A x IR52256-9-2-2-1R, NMS4A x IET9352 and IR58025A x IET201102 having more than 50% heterosis in order of merit grain yield and other yield components as well as significant sca effects for major components were most promising combinations and need to be tested on large scale for commercial exploitation of heterosis.

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• Mutagenic Effects of Sodium Azide on the Growth and Yield Characteristics in Wheat (Triticum aestivum L. em. Thell.)

  P. Srivastava, S. Marker, P. Pandey, D.K. Tiwari

  Asian Journal of Plant Sciences. 01/2011; 10:190-201.

  Sodium azide induced polygenic variably was studied on promising wheat variety HD-2733 in two subsequent cropping seasons during 2007-2009. For chemical treatment, 100 genetically pure seeds were soaked in distilled water for 6 hours, blotted dry and treated with freshly prepared mutagenic solution ... [more] Sodium azide induced polygenic variably was studied on promising wheat variety HD-2733 in two subsequent cropping seasons during 2007-2009. For chemical treatment, 100 genetically pure seeds were soaked in distilled water for 6 hours, blotted dry and treated with freshly prepared mutagenic solution of 0.02%, 0.04% and 0.06% concentration. In laboratory germination, root length and shoot length was observed. Among the different concentration of sodium azide, highest germination was recorded at control (99.55%) followed by 0.02% concentration (97.11%), 0.04% concentration (95.55%) and lowest at 0.06% concentration (85.77%). Higher concentration of sodium azide reduces the germination percentage, root length and shoot length; however, at low concentration it was at par with control. The magnitude of genotypic & phenotypic variability, heritability and genetic gain for various polygenic traits were also decreases with the increases in concentration of sodium azide. However, yield attributing characters showed both positive and negative shift in mean than those of control. Some of the mutant lines (eight progeny for earliness, one for plant height, three for spike length and grain yield each, two for tillering and four for test weight) were found desirable. These lines were either comparable to or better than control for yield and its components. It is concluded that sodium azide with 0.02% concentration appear to be most effective mutagenic treatment for induction of micro-mutation in yield component traits and selection in M2 populations of these treatment would be effective in rectification of simply inherited morphological deficiencies and bringing out lines with yield improvement.

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• Genetic Architecture, Inter-relationship and Selection criteria in Rice (Oryza sativa L.)

  S.K.Yadav, P. Pandey, B. Kumar, B.G.Suresh

  Pakistan Journal of Biological Sciences. 01/2011; 14:540-545..

  This study has been conducted to determine the extent of genetic association between yield of Rice (Oryza sativa L.) and its components. The present experiment was carried out with 40 Rice (Oryza sativa L.) genotypes which were evaluated in a randomized block design with 3 replications during wet se... [more] This study has been conducted to determine the extent of genetic association between yield of Rice (Oryza sativa L.) and its components. The present experiment was carried out with 40 Rice (Oryza sativa L.) genotypes which were evaluated in a randomized block design with 3 replications during wet season of 2007 and 2008. Results showed that sufficient amount of variability was found in the entire gene pool for all traits studied. Higher magnitude of genotypic and phenotypic coefficients of variation was recorded for seed yield, harvest index, biological yield, number of spikelets per panicle, flag leaf length, plant height and number of tillers indicates that these characters are least influence by environment. High heritability coupled with high genetic advance as percent of mean was registered for seed yield, harvest index, number of spikelets per panicle, biological yield and flag leaf length, suggesting preponderance of additive gene action in the expression of these characters. Grain yield was significantly and positively associated with harvest index, number of tillers per hill, number of panicle per plant, panicle length, number of spikelet's per panicle and test weight at both genotypic and phenotypic levels. Path coefficient analysis revealed that harvest index, biological yield, number of tillers per hill, panicle length, number of spikelets per panicle, plant height and test weight had direct positive effect on seed yield, indicating these are the main contributors to yield. From this study it may be concluded that harvest index, number of tillers per hill, panicle length and number of spikelet per panicle and test weight are the most important characters that contributed directly to yield. Thus, these characters may serve selection criteria for improving genetic potential of rice.

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• Estimation of genetic parameters in indigenous rice

  Pandey Praveen, P. John Anurag

  Advances in Agriculture & Botanics. 01/2010;

  Significant genetic variability was observed among 22 genotypes of indigenous rice for yieldand quality contributing traits viz., number of spikelets per panicle, test weight, grain yield per hill,volume expansion ratio, head rice recovery, kernel length and length breadth ratio, indicating thatther... [more] Significant genetic variability was observed among 22 genotypes of indigenous rice for yieldand quality contributing traits viz., number of spikelets per panicle, test weight, grain yield per hill,volume expansion ratio, head rice recovery, kernel length and length breadth ratio, indicating thatthere is presence of sufficient amount of variability in the study material and there is scope ofselection. On the basis of mean performance of yield and yield contributing traits it was concluded that“Indrani” was the best performer for both yield and quality which was at par with the hieghest yieldergenotype Jhumeri. For quality parameters Narendra-359 and Indrani were good, milling percentage ofLohandi was best followed by Bayalu & Dudagi general types. The results showed that PCV (phenotypiccoefficient of variance) in general was higher than GCV (genotypic coefficient of variation) for variouscharacters. However the difference between GCV and PCV was low for most of the characters studied.This indicates less degree of environmental influence on manifestation of these characters. Highheritability coupled with high genetic advance were recorded for number of spikelets per panicle,hulling percentage, milling percent and head rice recovery indicated the major role of additive geneaction in the inheritance of these character and these characters could be improved by selection insegregating generation. Thus, these characters may serve as an effective selection parameter duringbreeding programme for crop improvement.

• Heterosis studies for improvement in yield potential of wheat ( Triticum aestivum L.)

  Kundan K. Jaiswal, Pandey Praveen, Marker Shailesh, P. John Anurag

  Advances in Agriculture & Botanics. 01/2010;

  The present study was undertaken with a set of diallel crosses involving six genotypes ofbread wheat during Rabi 2008-09 to identify heterotic combinations expressing high hybrid vigour. Theseinformations would be useful to investigate the performance and relationship of F1 hybrids and parentsto sel... [more] The present study was undertaken with a set of diallel crosses involving six genotypes ofbread wheat during Rabi 2008-09 to identify heterotic combinations expressing high hybrid vigour. Theseinformations would be useful to investigate the performance and relationship of F1 hybrids and parentsto select suitable parents and population for designing an effective wheat breeding programme. Thecross combination Kalyansona x K-8962 followed by Sonalika x K-8962, K-8962 x HUW-234, Kalyansonax HUW234 and HUW-510 x HUW-234 were found top hybrids having high mid-parent heterosis. Negativeheterosis for days to flowering and plant height in cross PBW-373 x Kalyansona and HUW-510 x PBW-373 was found desirable. Highly significant heterosis was found for spike length in cross Sonalika x K-8962, tillers per plant in cross HUW-510 x K-8962, number of grains per spike in cross Sonalika x K-8962, test weight in cross PBW-373 x Kalyansona and harvest index in cross Kalyansona x K-8962. Itcan concluded that the heterosis estimates over mid-parent in the crosses were more frequent for daysto flowering, plant height, spike length, number of tillers per plant, grains per spike, test weight andharvest index.

• Depiction of genetic divergence in rice ( Oryza sativa L.)

  Pandey Praveen, P. John Anurag

  Advances in Agriculture & Botanics. 01/2010;

  The nature and magnitude of genetic divergence in 40 rice (Oryza sativa L.) genotypes fortwelve yield and yield component were assessed using Mahalanobis D2-statistics. The analysis ofvariance revealed highly significant differences for all the characters under studied, indicating thatthere is an am... [more] The nature and magnitude of genetic divergence in 40 rice (Oryza sativa L.) genotypes fortwelve yield and yield component were assessed using Mahalanobis D2-statistics. The analysis ofvariance revealed highly significant differences for all the characters under studied, indicating thatthere is an ample scope for isolation of promising lines from present gene pool for yield improvement.On the basis of D2 values the genotypes were grouped into seven clusters. Cluster VI was the largestcontaining 11 genotypes followed by cluster III with 9 genotypes. The composition of clusters indicatednon existence of correspondence between genetic diversity and geographical distribution. Plant height,biological yield and test weight contributed considerably, accounting for 86.16 % of total divergence.The highest intercluster distance was observed between cluster II and VII therefore the genotypesfrom cluster II (Triguna, MAUB-15, Pant dhan-6) having desired mean values for characters like daysto 50% flowering, panicle length and harvest index, were more divergent from the genotypes of clusterVII (Sonachur & Mala) having desired mean values for plant height, flag leaf width, spikelets perpanicle, biological yield and test weight, may be used in hybridization programme to achieve desiredsegregants with higher yield

• Environmental Considerations Concerning the Release of Genetically Modified Organisms

  P. PANDEY, KUMAR B, D.K.TIWARI

  Proenvironment Promediu. 01/2010;

  The current paper reviews on genetically modified crops and its impact on environment. The need forscreening and testing increases as more changes are made, and "second-generation" GMs will require more testing. Todate no adverse health effects caused by products approved for sale have bee... [more] The current paper reviews on genetically modified crops and its impact on environment. The need forscreening and testing increases as more changes are made, and "second-generation" GMs will require more testing. Todate no adverse health effects caused by products approved for sale have been documented, although two productsfailed initial safety testing and were discontinued, due to allergic reactions. Most feeding trials have observed no toxiceffects and saw that GM foods were equivalent in nutrition to unmodified foods, although a few reports attributephysiological changes to GM food. However, some scientists and advocacy groups such as Greenpeace and WorldWildlife Fund consider that the available data do not prove that GM food does not pose risks to health, and call foradditional and more rigorous testing before marketing genetically engineered food [3]. Therefore, before a crop isdeclared environment friendly safety assessment is recommended. If any safety concern is identified, the risk associatedwith it should be characterized to determine effect on human health. Subsequent assessments should consider factorssuch as toxicity, allergenicitY, antinutrients and metabolites, the stability of the inserted gene and nutritionalmodification associated with genetic modification. If the entire assessment of these factors concludes that the GM foodin question is as safe as its conventional counterpart, the food is then considered safe to eat.

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• Genetic Parameters for Yield and Certain Yield Contributing Traits in Rice (Oryza sativa L.).

  Praveen Pandey, P.John Anurag, N.R. Rangare

  Annals of Plant and soil research. 01/2010; 12:59-61.

  In the present study the genetic variability was estimated among forty rice (Oryza sativa L.) genotypes for yield and its components. The analysis of variance revealed highly significant differences for all the characters studied, indicating the presence of substantial genetic variability. The highe... [more] In the present study the genetic variability was estimated among forty rice (Oryza sativa L.) genotypes for yield and its components. The analysis of variance revealed highly significant differences for all the characters studied, indicating the presence of substantial genetic variability. The higher magnitude of genotypic and phenotypic coefficients of variation was recorded for harvest index, grain yield per hill, plant height and biological yield per hill. High heritability coupled with high genetic advance was exhibited by plant height and number of spikelets per panicle. These characters showed additive gene action. Thus, these characters may serve as an effective selection parameter during breeding programme for crop improvement.

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