MORPHOLOGICAL CHARACTERIZATION OF COWPEA [Vigna unguiculata (L.) Walp] GENOTYPES
KrishiKosh
View Archive InfoField | Value | |
Title |
MORPHOLOGICAL CHARACTERIZATION OF COWPEA [Vigna unguiculata (L.) Walp] GENOTYPES
|
|
Creator |
MADASU BRAHMAIAH
|
|
Contributor |
JHANSI RANI, K
|
|
Subject |
planting, genotypes, sowing, developmental stages, cowpeas, genetics, yields, biological phenomena, heritability, selection
|
|
Description |
The present investigation was undertaken with 40 genotypes of cowpea [Vigna unguiculata (L.) Walp] which were evaluated in a randomized block design at National Bureau of Plant Genetic Resources Regional Station (NBPGR), Hyderabad during Kharif- 2012, for characterization of genotypes based on qualitative and quantitative characters and to study genetic diversity, variability and character association for eighteen quantitative traits. The characters flower colour, pod colour, seed coat colour and eye pattern differentiated the genotypes more prominently among qualitative characters. The genotypes were also classified based on quantitative characters. The analysis of variance revealed significant difference for all the traits. On the basis of the mean performance, the genotypes NSJ 133 and RJR 229 were superior for earliness, whereas NSJ 159 and RJR 260 were superior for seed yield. The estimates of phenotypic and genotypic coefficient of variation, heritability and genetic advance as per cent of mean were high for plant height, length of main branch, number of clusters per plant, peduncle length, pods per plant, seed yield per plant, seedling vigour index and protein content indicated the existence of high degree of variability and additive gene action in the material under study, offering ample scope for selection. Seed yield recorded high positive association with leaf length, number of primary branches, number of clusters per plant, peduncle length, pods per plant, seedling vigour index and number of seeds per pod. While, negative association was observed with days to 50 per cent flowering, days to 80 per cent flowering and 100-seed weight. Path analysis revealed that number of primary branches, pods per plant, number of seeds per pod had considerable influence on seed yield. Mahalanobis D2 statistic revealed distinct clustering pattern and considerable genetic diversity within and between clusters and were grouped into six clusters based on quantitative characters. Maximum inter cluster distance was observed between cluster IV and VI indicating, maximum divergence among genotypes. The highest intra-cluster distance was recorded for cluster VI (26.01). On the whole, there was considerable diversity and variability for all the eighteen quantitative characters under study. The characteristics viz., number of primary branches per plant, number of clusters per plant, peduncle length, pods per plant and number of seeds per pod and seedling vigour index were identified as yield components. Considering all these components as selection indices, the genotypes NSJ 159 and RJR 260 are identified for future studies |
|
Date |
2016-06-16T15:00:08Z
2016-06-16T15:00:08Z 2013 |
|
Type |
Thesis
|
|
Identifier |
http://krishikosh.egranth.ac.in/handle/1/67471
|
|
Language |
en
|
|
Relation |
D9330;
|
|
Format |
application/pdf
|
|
Publisher |
ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY
|
|