Genotypic × environment interaction and
stability analysis for yield and quality components in elephant foot yam
[Amorphophallus paeoniifolius (Dennst) Nicolson].
Kumar
S, Singh PK, Solankey SS and Singh BK
African
Journal of Agricultural Research 9 (7): 707-712, 2014
E-mail:
bksinghkushinagar@yahoo.co.in
Abstract
Genotypic ×
environment (G × E) interactions in 35 indigenous line of elephant foot yam (Amorphophallus paeoniifolius Dennst
Nicolson) were evaluated for two consecutive years of 2007 and 2008 under four
environments in randomized block design (RBD) for yield, plant height, weight
of corm, size of corm, dry matter and starch content. Mean squares deviation
due to environment and environment linear variations were highly significant
for all the traits. Linear component of genotype × environment interaction
assumed importance for weight of corm, size of corm and yield. Thus, the prediction
of the genotypes in the environments appeared to be feasible for all the
characters under study. G × E interaction was found to be significant for dry
matter and starch content indicating that these quality contributing traits
were highly influenced by the change in environment leading to extension of
analysis for estimating stability parameters. All traits significantly observed
for environment + (genotype × environment) interaction confirming the influence
of environment and suggesting the existence of considerable variation among
genotypes as well as environments. On the basis of all three stability parameters
(xi, bi and S2di), the genotype NDA-9 possesses high mean, nearer to unit
regression and non-significant low deviation from regression. With respect to
yield on the basis of all three
adaptability parameters, it is evident that the genotype NDA-9 is stable as it
possesses high mean, nearer to unit regression and non-significant low
deviation from regression. Whereas the highest yielding genotype NDA-35 showed
above average sensitivity and low deviation from regression, this genotype
could be considered as a suitable for favorable environmental condition.
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