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CHARACTER ASSOCIATION AND GENETIC DIVERGENCE IN SOYBEAN (Glycine max (L.) Merrill)

KrishiKosh

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Title CHARACTER ASSOCIATION AND GENETIC DIVERGENCE IN SOYBEAN (Glycine max (L.) Merrill)
 
Creator PRAVEEN KUMAR, A
 
Contributor RAMANA, M.V
 
Subject CHARACTER, ASSOCIATION, GENETIC, DIVERGENCE, SOYBEAN
 
Description The present investigation was conducted at Regional Agricultural
Research Station, Lam, Guntur, Andhra Pradesh during Rabi, 2003 to study
the genetic variability, divergence, correlations and path analysis in 84
soybean genotypes for the following characters viz., days to 50% flowering,
days to maturity, plant height, number of branches per plant, number of pods
per plant, number of seeds per pod, 100 seed weight, total biomass per plant,
harvest index, protein content, oil content and seed yield per plant.
The analysis of variance revealed significant differences among the
genotypes for all the characters studied. Wider genetic variability with high
heritability and high genetic advance was observed for plant height, number
of pods per plant, total biomass per plant and seed yield per plant indicating
additive gene action operating in the inheritance of these important economic
characters. Hence, improvement of these characters is possible through
simple selection.
The results of Mahalanobis’s D2 analysis revealed that the 84 soybean
genotypes were grouped into thirteen clusters. The pattern of distribution of
genotypes from different regions in various clusters was at random, indicating
that geographical separation may not be the only factor causing genetic
diversity. Plant height, protein content, days to maturity, 100 seed weight,
total biomass per plant and oil content contributed maximum towards total
genetic divergence in soybean.
Based upon the divergence studies, crosses may be made between
the genotypes of cluster 2 viz., LSb 23, PK 1029, JS 335, LSb 28 and Cluster
8 viz., LSb 1 followed by cluster 13 viz., AVRDC 516, RSC 1, WC 67,
IC 15768, IC 15961 and cluster 8 viz., LSb 1 to obtain new recombinants in
soybean.
Correlation studies indicated that seed yield was positively correlated
with total biomass per plant, number of pods per plant, plant height, harvest
index, days to maturity, days to 50% flowering, number of branches per plant
and seeds per pod.
The results of path coefficient analysis further suggested that selection
for the characters viz., plant height, number of pods per plant, total biomass
per plant and harvest index will have positive influence on seed yield per plant
as these characters exhibited both direct effects and positive correlation with
seed yield.
Hence, a soybean genotype having higher biomass mainly through
plant height resulting in higher number of pod per plant with high harvest
index appears to be suitable plant type for rabi season in Andhra Pradesh
 
Date 2016-08-20T13:44:21Z
2016-08-20T13:44:21Z
2004
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/73159
 
Language en
 
Relation D7672;
 
Format application/pdf
 
Publisher ACHARYA N.G.RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD