Evaluation of hybrids for stability of grain yield and its attributing traits in pearl millet (Pennisetum glaucum L. R. Br.)
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Date
2006
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Publisher
CCSHAU
Abstract
An experiment was conducted to study the stability,
correlation and path coefficient for 11 traits in 30 hybrids of pearl
millet at four locations. Significant genotypic differences were observed
for all the traits in all the four environments. Estimates of environment
index revealed that E1 (irrigated condition at Hisar) was the most
favourable environment for majority of the characters. The G x E
interaction was highly significant for all the characters and its
partitioning into linear and non linear component revealed
preponderance of linear component for almost all the characters
except ear girth and total tillers per plant where non linear
component was dominant.
The estimates of stability parameters of individual genotype
revealed that hybrid 97111A x CSSC46-2 was the most ideal hybrid.
Besides high grain yield, it exhibited stable performance across the
environments for harvest index, plant height and ear length.
Correlation study revealed that grain yield was significantly and
positively correlated with harvest index, ear girth, effective tillers, dry
fodder yield and biological yield in all the four environments. The path
coefficient analysis suggested the importance of biological yield as it
has direct positive effect and indirect effect on grain yield in all four
environments. Hence, while breeding for increased grain yield main
emphasis should be given on biological yield.