Genetic variability, heritability and character association in pea (Pisum sativum L.).

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Abstract
Path analysis and character association in Pea
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Genetic variability, heritability and character
association in pea (Pisum sativum L.)
  • ... Genetic variability is pre requisite for effective improvement programme of any crop ( Azmat et al., 2011). Considerable genetic variation exists in Pisum sativum ( Blixt 1974, Kumar and Jain 2003, Ramesh and Tewatia, 2002,Sharma et al., 2003). Diverse genetic back ground provides desirable allelic variation among the parental lines to provide novel valuable combinations ( Taran et al., 2005). ...
    ... The presence of difference among the individual of population is an indication of diversity ( Azmat et, al., 2011). Existence of variability is critical for crop improvement programme and magnitude of variability for a specific character determines the success of genetic improvement of particular character ( Sharma et al., 2003). Higher standard deviation coupled with high co-efficient of variation and wide range of quantitative characters confirms high degree of variability for assessed traits. ...
    Article
    A total of 32 genotypes collected from different geographical areas evaluated at one site to determine the genetic variability. Considerable diversity was found in different traits of horticultural importance. Principal component analysis showed more than 84 % of total multivariate variation for important traits in different genotypes. Pod yield, pod length,10 pods weight and pods per plant were found to be major traits contributing towards principal component-I. Similarly, seeds per pod, secondary branches/plant, pod length were main positive contributing traits towards second component. Ten pod weight, pod width were positively contributing component towards principal component third. Pods per plant and shelling percentage were main traits contributing to principal component-IV, where as plant height, pod length and pod width were major positively contributing traits towards principal component -V. PS-1100, Meethi Phali, PB-87 and FC-1 were most divergent genotypes. On the basis of cluster mean of single linkage cluster analysis, Custer-I was best for number of primary branches and shelling percentage, Cluster -II for plant height,10 pods weight and pod yield per plant, cluster-III for number of pods /plants and cluster IV for pod length. Selection of genotypes from divergent clusters and components having more than one positive traits for hybridization programme may lead to improvement in yield and quality of pea.
  • ... They showed that seed yield is positively correlated with number of pods per cluster, number of pods per plant and biological yield per plant. A character association study was done by Sharma et al. (2003) Recombination breeding may be suggested for simultaneous improvement of biological yield per plant and harvest index. Chettri et al. (2003); reported that grain yield was significantly correlated with days to maturity and number of grain per pod in soybean at the phenotypic level. ...
  • ... The high magnitude of coefficient of variation at phenotypic as well as genotypic levels were observed for days to 50 percent flowering, days to maturity, plant height, number of pods per plant, seed yield per plant, number of primary branches per plant and harvest index. High range of phenotypic and genotypic coefficient of variation for seed yield per plant and various other yield component traits in field pea were also reported by Gupta et al. (986), Shah and Lal (1989), Singh et al. (1993), Singh (1995), Singh et al. (1996 and Puzio-Idzkowska (1996). Thus the results observed in present investigation are in agreement with earlier studies. ...
    Article
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    In order to best exploit the available genetic wealth in the crop, the information would have paramount important. Therefore, this study was conceived to examine the variability and determines the relative importance of primary and secondary traits as selection criteria to improve productivity. Field pea (Pisum sativum L. var. arvense) is amongst the most important legume crop of India. The experimental material comprised of 120 field pea germplasm including 40 indigenous and 10 exotic collections of pea and 4 check varieties viz., HUDP-15, HFP-4, HUP-2, Rachna. Five competitive plants from each plot were randomly selected for recording observations for all the quantitative characters except days to 50 per cent flowering and days to maturity, which were recorded on line basis. In present study a strong and positive association of seed yield per plant observed with harvest index, biological yield per plant, plant height, number of seeds per pod, number of primary branches per plant, number of pods per plant and 100-seed weight. Days to maturity and number of seeds per pod showed positive correlation with days to 50 per cent flowering and number of primary branches per plant respectively. Days to maturity and 100-seed weight and number of pods per plant showed weak association with seed yield per plant in positive direction. Thus, these characters emerged as most vital component traits and associated positively with seed yield per plant.
  • ... Pod length was positively and significantly correlated with number of seeds per pod during both the seasons. Sharma et al.(2003) also reported similar correlations of pod length with number of seeds per pod. A positive significant association between days to 50 per cent flowering and days to first picking during both the years was observed indicating that early flowering lines would be an appropriate selection criterion to fetch early yield. ...
    Article
    Full-text available
    The present investigations involving forty five diverse pea recombinant inbreds and three standard checks were carried out for two successive years during 2011-2012 and 2012-13. The objective of the study was to ascertain genetic variability, heritability, genetic advance, correlation and path coefficient among yield and other horticultural and quality traits and identification of superior recombinants for their utilization in crop improvement programme Wide range of variability was observed for most of the characters under study. The magnitude of phenotypic coefficient of variation (PCV) was higher than the genotypic coefficient of variability (GCV) for all the traits. High phenotypic and genotypic coefficient of variations were recorded for protein content, ascorbic acid, plant height and pod yield per plant for both the years. Pod yield per plant and plant height exhibited high heritability associated with high genetic advance in the respective years indicating the additive gene action for their expression and are likely to respond better to selection. Pod yield showed a positive and significant correlation with number of pods per plant, pod length and number of seeds per pod both the years. Path analysis revealed that number of pods per plant and pod length have highest positive direct effect both the years and thus it may be treated as selection criteria for isolating higher yielding genotypes in garden peas. In heterosis study, some of the recombinant inbreds were found superior over standard checks which include L-14 and L-13 for pod yield/plant, number of pod/plant and earliness. These fmdings can be further utilized to develop and enhance the yield potential of garden pea.
  • ... Pod length was positively and significantly correlated with number of seeds per pod during both the seasons. Sharma et al.(2003) also reported similar correlations of pod length with number of seeds per pod. A positive significant association between days to 50 per cent flowering and days to first picking during both the years was observed indicating that early flowering lines would be an appropriate selection criterion to fetch early yield. ...
    Article
    Full-text available
    The present investigations involving forty five diverse pea recombinant inbreds and three standard checks were carried out for two successive years during 2011-2012 and 2012-13. The objective of the study was to ascertain genetic variability, heritability, genetic advance, correlation and path coefficient among yield and other horticultural and quality traits and identification of superior recombinants for their utilization in crop improvement programme. Wide range of variability was observed for most of the characters under study. The magnitude of phenotypic coefficient of variation (PCV) was higher than the genotypic coefficient of variability (GCV) for all the traits. High phenotypic and genotypic coefficient of variations were recorded for protein content, ascorbic acid, plant height and pod yield per plant for both the years. Pod yield per plant and plant height exhibited high heritability associated with high genetic advance in the respective years indicating the additive gene action for their expression and are likely to respond better to selection. Pod yield showed a positive and significant correlation with number of pods per plant, pod length and number of seeds per pod both the years. Path analysis revealed that number of pods per plant and pod length have highest positive direct effect both the years and thus it may be treated as selection criteria for isolating higher yielding genotypes in garden peas. In heterosis study, some of the recombinant inbreds were found superior over standard checks which include L-14 and L-13 for pod yield/plant, number of pod/plant and earliness. These findings can be further utilized to develop and enhance the yield potential of garden pea.
  • ... Reference [18] also reported high coefficient of variation for yield, plant height, number of primary branches per plant and pod weight. Reference [19] also reported high coefficient of variation for seed yield per plant followed by pod per plant whereas [20] reported high coefficient of variation for plant height. Obtained values for coefficients of heritability confirm results by other authors [21] [22], which reported for moderate to high inheritance of investigated from them quantitative traits (plant height, seeds per pod and pods per plant). ...
    Article
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    The trial was carried during 2011-2013 on the second experimental field of the Institute of forage Crops-Pleven, Bulgaria. Populations of P 1 , P 2 , F 2 and F 1 of the crosses Shtambovii × Pleven 10 and Rosacrono × Pleven 4 and their reciprocals were investigated. Heterosis for the investigated traits was found in the hybrids of F 1 generations. The cross Rosacrono × Pleven 4 had the highest positive true heterosis for plant height (31.54%), height to first pod (15.44%) and pod length (17.11%); the cross Shtambovii × Pleven 10—for nods per plant (56.10%) and pod width (20.38%); Pleven 10 × Shtambovii—for 1000 seeds mass (14.65%) and Pleven 4 × Rosacrono—for number of seeds per pod. In F 2 the plants from Rosacrono × Pleven 4 had the strongest depression for plant height (28.26%), height to first pod (27.74%) and pod length (18.13%); Shtambovii × Pleven 10—for 1000 seeds mass (32.22%) and number of seeds per pod (13.87%). The stability of the studied characters was determined. Their variation in F 1 in the hybrid combination between Shtambovii and Pleven 10 was higher than F 1 of Rosacrono and Pleven 4. For more traits in direct crosses variability was found to be lower in relation to the reciprocal crosses in both combination. The genetical part in phenotipycal expression for height to first pod (Pleven 10 × Shtambovii), pod length and number of seeds per pod (Pleven 4 × Rosacrono) was relative high and existed probability for selection of homozygous genotypes in the generation F 2 and F 3. The mass phenotype selection for other traits can implement and will be more effective if it starts in later hybrid generations (F 6-F 7) or through individual selection.
  • ... number pod per plant. When dominant gene actions predominate in these traits there is small probability selection in early crossed generations to be successful [BHARDWAJ and VIKRAM, 2004; KUMAR et al., 2003; SORPHI et al., 2006] reported for high coefficient of variation for yield, plant height, number of primary branches per plant and pod weight. [SHARMA et al., 2003] ...
    Article
    Full-text available
    The experimental study was conducted during 2007–2009 period in second experimental field of Institute of Forage Crops, Pleven. The hybridization scheme including direct and back crosses covered four varieties of forage pea (Pisum sativum L.), spring–Rezonator and Harkovskii etalon from Ukrainian, winter Bulgarian varieties Vesela and Mir. Inheritance of quantitative traits was analysed–plant height, seed number per plant, pod number per plant, seed number per pod and seed weight per plant of parental components (Р 1 and Р 2) and crosses of first and second hybrid generation (F 1 and F 2). Heterosis effect in F 1 –hypothetical and true and degree of dominance in F 1 (h p1) and in F 2 (h p2), depression , degree (Tn) and frequency of transgression in F 2 and variability (VC %) were determined for each studied trait. Highest real heterosis effect was found in crosses Mir x Rezonator for plant height (60.24%) and seed number per pod (–0.05%), Harkovskii etalon x Mir for pod number per plant (58.88%) and seed weight per plant (51.92%), Rezonator x Mir for seed number per plant (7.39%). In F 2 with strongest depression are plants from cross Mir x Vesela for number seeds (43.53%), number pod (47.03%) and seed weight per plant (46.55%) and Mir x Rezonator for plant height (28.71%) and seed number per pod (18.59%). Cross Harkovskii etalon x Mir is with highest degree of transgression for traits plant height (24.10%), pod number per plant (64.49%) and seed weight per plant (69.62%). Low variability in F 1 and F 2 was found at plant height (3.06–15.14%). Highest is variability for seed weight per plant in F 1 (19.08– 76.45%).
  • Article
    Full-text available
    Genetic variability and character association were studied for ten yield and its component characters in 270 F 5 families in pea. The families showed considerable variation for nine yield contributing characters including yield. Genotypic coefficient of variation (GCV) was lower from phenotypic coefficient of variation (PCV) for most of the traits except days to maturity indicating significant role of environment on the expression of those characters. High heritability coupled with high genetic advance was observed for plant height and branches per plant, which indicated that selection for these characters would be effective. Correlations were estimated to estimate the strength of association between yield and nine other characters. Significant positive genotypic and phenotypic correlation with seed yield per plant observed for most of the characters except 50% green pod maturity, plant height and branches per plant. Path analysis revealed that seeds per pod (2.02) and 100 seed weight (1.01) had high and positive direct effects while pod length (-1.39), days to maturity (-0.46) and plant height (-0.14) had negative direct effects towards seed yield.
  • Article
    Full-text available
    An experiment was undertaken to study genetic variability and character association in 26 advanced lines of vegetable pea (Pisum sativum L.) based on eight characters. Among twenty six advanced lines twelve obtained from the cross between Edible Podded Pea and IPSA Motorsuty-1, nine obtained from the cross between Local White and IPSA Motorsuty-3 and five parental lines were included to measure genetic variability. The field experiment was conducted at the research farm, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh. Analysis of variance showed significant differences among the genotypes for all characters. Phenotypic coefficients of variation (PCV) was close to genotypic coefficients of variation (GCV) for all the characters except branches per plant, seeds per pod, pods per plant, 100-seed weight and seed yield per plant. High heritability associated with high genetic advance was observed for plant height, pod length and seed yield per plot. Significant positive genotypic and phenotypic correlation between seed yield per plant and days to 50% harvest, pod length, pod breadth and seeds per pod were observed. Path coefficient analysis revealed that days to 50% flowering, days to 50% harvest, number of branches per plant, pods per plant, seeds per plant and 100-seed weight had positive direct effect on seed yield per plant.
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December 31, 2016
Genetic variability, heritability and character association in pea (Pisum sativum L.)
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