STABILITY ANALYSIS OF POD YIELD AND ITS IMPORTANT TRAITS IN SPANISH RDNCH GROUNDNUT {Jlrachishypogaea L) GENOTYPES
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Date
2007-01-04
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University of Agricultural Sciences GKVK, Banglore
Abstract
An experiment was carried out involving thirteen genotypes and four check
varieties during kharif 2003 at six different locations to know the magnitude of variability
present and to assess the stability of genotypes for productivity traits. The genotypes were
also assessed for change in the nature of inter-relationships and path effects of different
characters towards pod yield.
Mean performance of genotypes indicated that Nippani was the most favourable
environment for better expression of most of the characters. Analysis of variance revealed
significant differences among most of the characters suggesting a high degree of
variability among the genotypes tested. Genetic variability analysis revealed pod yield per
plant and hundred kernel weight had higher variability, heritability and expected GAM as
compared to other traits.
The pooled analysis of variance revealed significant differences among the
genotypes and environments for most of the characters indicating the genotypes and
environments tested are diverse in nature. Genotype x environment interaction was
significant for all the traits suggesting genotypes interacted significantly with the
environments. While, genotype x environment (linear) interaction was significant for
plant height, pod yield per plant and shellirg per cent indicating genotypes responded
linearly to the changing environment. The non-linear component (pooled deviation) was
highly significant for all the traits indicating this part of the variation in terms of
performance of the genotypes is unpredictable.
On the basis of stability parameters, Dh-104 and Mutant III were promising
genotypes for majority of characters with higher mean performance across the six
environments.
The association analysis revealed that pod yield per plant exhibited significant
positive association with number of pods, shelling per cent and SMK per cent at five
locations and path analysis indicated that number of pods, shelling per cent and SMK per
cent exerted high direct effect each in three locations.
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