Evaluation of grain yield and diastatic power in barley for north western plains of India

Abstract

Information on mega environments and test sites for grain
yield is scanty and even not studied for diastatic power in
barley and confounding G x E invariably misleads further
in yield maximization and quality improvement. Average
grain yield and diastatic power over the locations were
exhibited as 42.3 q/ha and 101.5oL and ranged from 32.1 to
64.4 q/ha and 97.3 to 109.6oL, respectively. Initial two
principal components showed reasonably good amount
of the interaction component and explained nearly 60%
and 57 % of the variation for grain yield for diastatic power.
GGE biplots revealed that no single cultivar was winning at
all the locations and indicated possibilities of crossover
type genotype by environment interaction. Based on AEC
abscissa and ordinate scores the genotype DWRB150 and
check BH902 were observed high yielding and stable,
whereas the check DWRB92 showed wider adaptability for
diastatic power. For grain yield the location Hisar was
classified as Type 2 ideal environment with long vector and
acute angle, whereas for diastatic power the environments
Ludhiana and Mathura were discriminating and
representative. The study initiated possibilities to review
non-informative and correlated test sites based on soil,
rainfall, biotic factors and previous data to eliminate in
future evaluation.