Naorem Brajendra Singh

• Doctor of Philosophy
• Professor at Central Agricultural University

The present investigation was carried out at Genetics and Plant Breeding (GPB) farm, College of Agriculture, Central Agricultural University, Imphal, Manipur during kharif 2021 using 60 genotypes of Mung bean. Mahalanobis D2 statistics was used to evaluate the diversity. A total of fourteen clusters were formed with maximum number of genotypes in c...

During the kharif season 2022, a field experiment was carried out at the College of Agriculture, Central Agricultural University, Imphal, Manipur. The experiment consisted of 8 treatments i.e. T1 (hand weeding at 20 and 40 DAS), T2 (rice husk @ 10 t/ha), T3 (pendimethalin @ 1 kg/ha), T4 (imazethapyr @ 0.07 kg/ha), T5 (imazethapyr @ 0.08 kg/ha), T6...

The present investigation was carried out to identify the potential donors of resistant gene(s)/the source of white rust disease in B. juncea using 30 genotypes, including locally adapted accessions and advanced breeding lines. Out of 30 genotypes, ten lines viz. Bio-YSR, CAULC-1, CAULC-2, CAULC-3, CAULC-4, CAURM-2, CAULR-7, CAURM-4, CAURM 4-1, and...

Mung bean (Vigna radiata L. Wilczek) is one of the most important pulse crops due to the high content of protein as well as the ability to nitrogen fixation in soil. Seed yield is the most complex trait which highly influenced by other traits and also the environment. In this view, the study was aimed to evaluate the relationship between yield and...

The experiment was carried out during rabi 2018-19 and rabi 19-20 in the experimental field of College of Agriculture, Central Agricultural University, Imphal. Seeds of two genotypes of Indian mustard viz., CAULC-2 (local cultivar) and NRCHB-101 were exposed to three doses (1000, 1100 and 1200 Gy) of gamma rays, three concentrations of ethyl methan...

The experiment was carried out during rabi 2018-19 and rabi 19-20 in the experimental field of College of Agriculture, Central Agricultural University, Imphal. Seeds of two genotypes of Indian mustard viz., CAULC-2 (local cultivar) and NRCHB-101 were exposed to three doses (1000, 1100 and 1200 Gy) of gamma rays, three concentrations of ethyl methan...

The experiment was carried out during rabi 2018-19 in the experimental field of College of Agriculture, Central Agricultural University, Imphal. Seeds of two Indian mustard genotypes CAULC-2 and NRCHB-101 were exposed to three doses of gamma rays (1000, 1100 and 1200 Gy), three concentrations of ethyl methanesulphonate (0.3, 0.5 and 0.7%) and their...

Nitrogen (N) fertilizer carves a lion's share amongst the nutrient source required for plant growth and development. Fertilizer N is touted as one of the key inputs in cereals, in particular rice production in Asian countries. Amongst the nutrient management techniques, N management is the main concern in rice production. N holds a distinctive prom...

The present investigation was carried out with fifty blackgram genotypes to study the genetic diversity for 14 characters during Kharif, 2019. For all the characters analysis of variance presented significant differences. For all the characters the genotypic coefficient of variation (GCV) was smaller than the phenotypic coefficient of variation (PC...

Twenty nine promising genotypes of Tomato were grown in five different environments to study phenotypic stability for fruit yield and its components. The study revealed that the genotype BRH-2 followed by the genotype Arka Vikas can be utilized to develop promising lines having wider adaptability in future breeding programmes. Among the environment...

This study was carried out in Andro Research Farm, CAU, Imphal to study diallel analysis of yield and its important components in 10 genotype of wheat during two consecutive rabi season 2017-2019. All the 10 genotype and their 45 F1's cross combination exhibited significant difference in characters under study Combining ability analysis showed that...

Background: Zinc plays an important role in different plant metabolism processes like development of cell wall, respiration, photosynthesis, chlorophyll formation, enzyme activity and other biochemical functions etc. In spite of these various metabolic functions, no extensive field study was taken up in Manipur, India. Therefore, this study was aim...

Study of mutation induced by Sodium Azide in field pea (Pisum sativum). Journal of Current Opinion in Crop Science, 1(1), 11-15. The present study was conducted to determine the effect of Sodium Azide's sensitivity (0.1%, 0.3% and 0.5%) on three genotypes of field pea viz., Makhyatmubi, Makuchabi, and Rachna. In M1 generation, a dose-dependent decr...

Lentil (Lens culinaris Medik) is a major grain legume crop in our country which is grown during rabi season. This experiment was carried out in CAU Research Farm, Andro to study the genetic variability, correlation and path coefficient of twenty lentil genotypes during rabi 2018-2019. These genotypes exhibited significant variability in respect of...

A study was conducted on 46 genotypes of hill rice during 2017 with an objective of assessing heritability and genetic advance for yield contributing characters. The experiment was laid out in Augmented Design with two checks at Analysis of variance among 46 genotypes showed significant difference for all 13 quantitative characters studied. The hig...

Eight genotypes consisting three Basmati varieties viz, Basmati Kasturi, Basmati 370 and Basmati with five Manipur scented rice landraces viz, Chakhao Poireiton, Chakhao, Chakhao Amubi, Ching Chakhao and Chakhao Angangba were crossed in 8X8 diallel fashion without recieprocal producing twenty eight F 1 hybrids and were evaluated to estimate mid par...

Eight parents of aromatic rice were crossed in half diallel mating design without reciprocal including parents. The parents were evaluated for eleven different characters. Genetic analysis was done through Griffing's Method II Model I. Analysis of variance revealed highly significant differences among parents and their crosses for all the character...

Three genotypes of field pea namely Makhyatmubi, Makuchabi and Rachna were used in the present study. A chemical mutagen, sodium azide, a mono-functional alkylating agent was used in three concentration for induction of mutation in each varietyand subjected to 0.1%, 0.3% and 0.5% of Sodium Azide for 6 hours with intermittent shaking at room tempera...

Seven parental lines with 21 F1 cross combination of Lathyrus, totally 28 treatments were grown in the RBD with three replications. Each parents and F1s in single row 4m long were grown with the spacing of 30 x 10 cm between and within rows, respectively. The analysis of variance revealed significant differences among the parents and the F1 cross c...

Seven parental lines with 21 F1 cross combination of Lathyrus, totally 28 treatments were grown in the RBD with three replications. Each parents and F1s in single row 4m long were grown with the spacing of 30 x 10 cm between and within rows, respectively. The analysis of variance revealed significant differences among the parents and the F1 cross c...

The seven parents and their 21 F1 s were grown in randomized block design with 3 replications during rabi 2015-16. In the field experiment, observations on 12 quantitative characters were recorded for genetic analysis. The analysis of variance for combining ability revealed significant differences among crosses for all the characters studied except...

The present study was undertaken to understand the genetic diversity of Chilli found in Manipur using RAPD primers. Twenty (20) primers were screened, out of which 9 primers gave polymorphic bands which were used for further analysis. The polymorphic information content (PIC) values ranged from 0.2 (OPB-15) to 0.45 (OPW-04) with an average of 0.35....

The 42 selected maize landraces of Manipur were analyzed to study genetic variability and correlation for the 8 quantitative traits and a qualitative trait. All the characters under studied had genetic variability and some characters have significant correlation. To confirm the kernel color have the direct relation in the amount of total carotenoid...

Vitamin A is one of the essential nutrients for normal functioning and growth in our body. Biofortification of vitamin A in t he crop (Maize) is an economical way to overcome vitamin A deficiency. The crtRB1 is an important gene in the carotenoid pathway which increases β-carotene accumulation in maize. Selecting the lines having favourable allele...

Marker Assisted Selection (MAS) is becoming an efficient method of crop improvement programme for maize and other crops. For this method, it requires quality genomic DNA extraction of the large sample. The present study described a simple, cost-effective miniprep DNA extraction method without using liquid nitrogen from the leaf of maize that can be...

To study the inheritance of some important yield contributing characters and yield through combining ability analysis, the eight parents of lentil genotypes were selected and crossed in diallel without reciprocals. The analysis of variance for combining ability revealed highly significant differences among crosses for all the characters studied. Th...

Vertical distribution of DTPA-extractable micronutrient cations (Zn,Cu, Fe and Mn) and their relationship with various soil properties were studied in sixteen profiles of orange orchard of Tamenglong district of Manipur. The DTPA-extractable Zn, Cu, Fe and Mn content were greater in the surface soils than the sub-surface horizons. In most of the pr...

The phosphorus fractions of the twenty surface soils (0 -15 cm) of Imphal West district, Manipur and their relationship with some physico-chemical properties of the soils were studied. A significant relationship was obtained between organic-P and total-P in the soils. The average Sal-P, Fe-P, Al-P, Red-P, Occl-P and Ca-P content were 8.70, 73.38, 5...

Existing genetic variability and strong trait associate ion among cultivars/germplasm offer great help in enhancing the genetic gain/breeding value in crop plants. The objective of this study was to analyze the traits association and principal components causing genetic variability present in twenty-eight genotypes (Parents + Hybrids) using 12 agro...

The purpose of this study was to carry out a comparative evaluation of the physicochemical properties of mucin powders extracted from three different sources. Mucin powders was extracted from the African giant snails and the intestines of cow and pigs by the wet rendering process and differential precipitation with chilled acetone. The precipitates...

Aim of the study is analyse the inheritance of seed yield and its contributing traits trough combining ability analysis in field pea for these seven genotypes as parents viz., Makhyatmubi, Makuchabi. KPMR-851, Prakash, Pant P-217, Rachna and vL-5 in diallel without reciprocals during Rabi 2013-14 were selected. The genetic analysis was carried out...

A field experiment was conducted in the Horticulture Research Farm, Andro, Imphal East during 2014 – 2015. The treatments consisted of IGDa-4, IGDa-2, NAUDa-2, Da- 199, Da-11, Da-25 and local cultivar as check. The physiological parameters at 135 days after planting viz., leaf area index (2.83), harvest index (76.37%) and crop growth rate (3.10 g d...

The present study was undertaken to understand and find out the morphological characters contributing to the diversity of chilli germplasm of Manipur. A total of 20 chilli cultivars were collected from different districts of Manipur and characterized using 41 morphological characters (both qualitative and quantitative) based on IPGRI Descriptor for...

The adoption of suitable horticultural advance practices like poly-house and rain shelter will provide ideal growth condition in areas with heavy rainfall and high humidity that affect the flowering and fruiting which limit the exploration of crop potential. Production of off-season horticultural crops with high remunerative returns is possible und...

The experiment was laid out in randomized block design with three replications and eight weed control treatments viz., weedy check, polythene mulching as pre emergence (PE), pendimethalin30EC (PE), chlorimuron ethyl 9g ha-1as post emergence (POE), quizalofop ethyl 50g ha-1 (POE), imazethapyr 100g ha-1 as early post emergence (EPOE), one hand weedin...

The experiment was laid out in randomized block design with three replications and eight weed control treatments viz., weedy check, polythene mulching as pre emergence (PE), pendimethalin30EC (PE), chlorimuron ethyl 9g ha-1as post emergence (POE), quizalofop ethyl 50g ha⁻¹ (POE), imazethapyr 100g ha⁻¹ as early post emergence (EPOE), one hand weedin...

Black gram (Vigna mungo), which belongs to leguminaceae family is a very important pulse crop in India. Black grain is grown throughout India. It is commonly used in the form of fermented food such as idli, dosa,papad, and other regional foods in India. It is consumed in the form of split pulse as well as whole grain, which is a good source of prot...

Plants respond to low temperatures with changes in their pattern of gene expression and protein products. Many species of tropical or subtropical origin are injured or killed by non-freezing low temperature, and exhibit various symptoms of chilling injury such as chlorosis, necrosis, or growth retardation. In contrast, chilling tolerant species are...

Agricultural crop production has been seriously hampered by various detrimental environmental conditions all over the world. Such conditions modify the growth and development of plants and ultimately reduce the economic yield enormously. These detrimental effects can be overcome by developing better stresstolerance plants utilizing different geneti...

Different explants of local chrysanthemum cultivars available in West Bengal including leaf, shoot tip and ray floret were employed to compare their efficiency for direct in vitro regeneration system. The explants were inoculated in Murashige and Skoog (MS) media supplemented with varied combinations of indole acetic acid (IAA), benzylaminopurine (...

Profile distribution of DTPA-extractable micronutrient cations (Zn, Cu, Fe and Mn) and their relationship with various soil properties were studied in eighteen profiles of citrus orchard of Ukhrul district of Manipur. The content of DTPA-extractable Zn, Cu, Fe and Mn were higher in surface horizons and decreased with depth in most of the profiles a...

An experiment was conducted on an alkaline clay loam soil of Golagamdi, India during 2005-2006 to study the effect of Farm Yard Manure and pressmud on fertility status of alkali soil under maize-wheat cropping sequence. The treatment consist of three levels of organic manure M0- no manure; M1- FYM at the rate of 10 t ha-1; M2- Pressmud at the rate...

Genetic diversity among 31 genotypes of groundnut were estimated using Mahalanobis D2 statistic for five agro-morphological characters. The analysis of variance revealed significant differences among the genotypes for all characters. Based on Tocher's method, 31 genotypes were grouped into seven clusters, where cluster I was the largest containing...

Evaluation of nutrient status in soil is important for nutritional, environmental and economical aspects. Phosphorus is a very important nutrient for leguminous crops. In order to evaluate the phosphorus availability, six soil test methods were carried out for predicting response of soybean to phosphorus application on twenty surface soils (0-15 cm...

A study was conducted to determine the sensitivity of EMS (0.05 %, 0.1 % and 0.5%) on three varieties of field pea viz., HFP-554, Prakash and Rachna. In M1 generation the pollen fertility showed a negative dependence on the dose of EMS i.e., it decreased with the increasing concentration of the mutagen in all the three varieties. Lowest value of po...

Rattus is the most studied genus all over the world but species of the genus are not thoroughly reported from Manipur. The present paper deals with the morphometric, cytotaxonomic and phylogenetic studies of Manipur, India. The different species of Rattus namely Rattus rattus, Rattus brunneusculus, Rattus tanezumi and Rattus nitidus were studied. B...

Rice crops in the field are subjected to attack by a number of insect pests causing a major yield loss up to 26.7% in rice. Of these insects, the rice gall midge is one of the most destructive pests in South and Southeast Asian countries including India. The existence and emergence of new and virulent biotypes of rice gall midge are a cause of conc...

Crop compatibility is the most essential factor in a feasible intercropping system. Thus the success of any intercropping system depends on the selection of crop species which competes for light, space, moisture and nutrients between them. The combination of a non-leguminous species with a leguminous one might be expected to generate yield advantag...

Six soil test methods were evaluated for response of black gram to phosphorus application on 20 surface soils (0 – 15 cm) of Imphal west district of Manipur. The suitability of the extractant was in the order: Bray 1 > Bray 2 >Mehlich 3 >Troug> Olsen (pH- 8.5) >Mehlich 1. Bray 1 extractant was assessed to be the best extractant on the basis of high...

Path coefficient analysis with correlation coefficient for yield and its component were conducted using twelve genotypes of India mustard during rabi season 2010-11at Langthabal Kunja, Manipur. Information obtained by this technique helps in direct and indirect selection for genetic improvement of yield. Genotypic correlation coefficient between al...

The diversity of rats of the Manipur, the easternmost state of India remains largely unexplored besides some of the works of the Zoological Survey of India. Out of a total of 4,629 species of mammals known in the world, 372 species occur in the Indian union. Of these, 69 species are reported from Manipur (Mandal et al., 2005). Five subspecies under...

Genome sequencing (GS) technologies are revolutionizing biology and can be applied to address critical issues in plant biology. Technologies can produce draft sequences of genomes with a significant reduction to the cost and time frame of traditional technologies. In addition, these technologies can be used to assess gene structure and expression,...

With the increase in awareness of the people about health and bio safety issue, there is reluctance for the acceptance and use of transgenic crops since it includes combination of genes between species that cannot hybridize by natural means. As an alternative way to transgenesis, two different approaches, cisgenesis and intragenesis were developed....

The implication of molecular biology in crop improvement is now more than three decades old. Not surprisingly, technology has moved on, and there are a number of new techniques that may or may not come under the genetically modified (GM) banner and, therefore, GM regulations. In cisgenic technology, cisgenes from crossable plants are used and it is...

A study of the macro- and micro-nutrients of some soils of Senapati district, Manipur (India) was carried out to study the soil fertility and micro- nutrient status and their relationship with each other. Surface soil (0 to 30 cm) was investigated for diethylene-triaminepentaacetate (DTPA)- extractable Zn, Cu, Mn, Fe and hot water extractable B i...

The effect of inorganic, biological and organic manures on nodulation and yield of soybean and soil properties was studied during rainy seasons of 2008 and 2009 in India (Manipur). The experiment consists of nine treatments viz., T1 - Absolute control, T2 – FYM (Farmyard manure) at the rate of 5 t ha-1, T3 -Vermicompost at the rate of 1 t ha-1, T4...

The implication of molecular biology in crop improvement is now more than three decades old. Not surprisingly, technology has moved on, and there are a number of new techniques that may or may not come under the genetically modified (GM) banner and, therefore, GM regulations. In cisgenic technology, cisgenes from crossable plants are used and it is...

An investigation was conducted during rabi season of 200910 and 2010–11 to assess the stability on yield and its attributes along with oil content of twelve genotypes of Indian mustard (Brassica juncea L. Czern and Coss) at two locations with two different dates of sowing creating eight artificial environments. Variance due to G x E interaction was...

An investigation was conducted during rabi season of 2009-10 and 2010-11 to assess the stability on yield and its attributes along with oil content of twelve genotypes of Indian mustard (Brassica juncea L. Czern and Coss) at two locations with two different dates of sowing creating eight artificial environments. Variance due to G x E interaction wa...

The study was carried out to characterize and access the genetic parameters and character association for eight morphological traits of forty maize landraces collected from 9 districts of Manipur. The accessions were characterized according to three important phenotypic traits, viz., Kernel Colour, Kernel Shape and Kernel Row Arrangement. There wer...

Plant breeding is long and expensive biological science but plant varieties can easily be produced, therefore, breeders need protection to recover investment. Plant breeding has conventionally offered challenges for patent safety due to a number of technical and legal factors that include hitches in defining, as well as verifying, whether the breed...

Abiotic stresses collectively are responsible for crop losses worldwide. Among these, drought and salinity are the most destructive. Different strategies have been proposed for management of these stresses. Being a complex trait, conventional breeding approaches have resulted in less success. Biotechnology has emerged as an additional and novel too...

A half diallel cross using seven (7) bacterial wilt resistant/tolerant genotypes and high yielding varieties was done to study the extent of heterosis of some important fruit quality traits in tomato. The heterosis over better parent (BP) was up to the extent of 14.04, 11.17, 27.87, 15.03, 22.59, 8.00, 21.04 and 45.89 per cent was recorded for frui...

A 7x7 half diallel cross of tomato was evaluated with parents for heterotic manifestation of yield and yield attributing characters. The heterosis over superior parent (SP) to the extent of 22.05, 14.59, 139.61, 29.47, 98.70, 102.08, 163.20, 110.98, 177.85 and 165.03 per cent was recorded for days to flowering, days to last ripening, plant height,...

Environmental factors such as drought, salinity and extreme temperatures are responsible for low productivity of crop plants worldwide. Plants adapt to such situations by various mechanisms. An insight into the different complex mechanisms can lead to the solution of the mystery of abiotic stress tolerance in plants. Several researchers all over th...

To cope with the changing climate, a study was undertaken during rabi season 2009-10 and 2010-11 in Indian mustard (Brassica juncea L. Czern and Coss) so as to find out a suitable variety for valley conditions of Manipur. The stability on yield and its important attributes of twelve genotypes under eight environments was studied. Environmental anal...