Research on the genotypic and phenotypic associations among
agricultural crop traits can be used to design, evaluate, and develop selection
criteria for desirable traits. Yield is a complex quantitative trait largely
influenced by the environment. Direct selection for grain yield is less
efficient in improving groundnut productivity. The selection efficiency can be
enhanced by exploiting the relationship between yield and its related traits.
In the present study strong positive association was noticed between pod yield
per plant and kernel yield per plant, oil yield per plant and significant and
negative association with late leaf spot severity and rust incidence
irrespective of the environments. Pod yield was also correlated with 100-kernel
weight, plant height and oil content in environment III. The magnitude and
direct association of pod yield with other characters varied from environment
to environment. Inter correlation estimates for yield components revealed that
plant height, 100-kernel weight, kernel yield per plant, oil yield per plant,
late leaf spot severity, number of matured pods per plant, harvest index and
plant height were significantly associated with one another and also with pod
yield per plant which indicated that these characters were important components
for improvement of pod yield in groundnut. This indicated that selection of
genotypes based on oil yield per plant and kernel yield per plant is
advantageous than the other characters. The direct effect of kernel yield per
plant in all the three environments followed by shelling percentage, rust
incidence, oil yield per plant, number of branches per plant in environment I
and plant height in environment I and III. The direct effect of other
characters fluctuated between negative and positive values indicating the
influence of environment on these traits.
Author(s) Details:
Venkataravana P.,
College of Sericulture, Chintamani, University of Agricultural
Sciences, Bengaluru (Karnataka), India.
Sowjanya, B. A.,
College of
Sericulture, Chintamani, University of Agricultural Sciences, Bengaluru
(Karnataka), India.
Priyadarshini, S. K.,
College of Sericulture, Chintamani, University of Agricultural
Sciences, Bengaluru (Karnataka), India.
Please see the link here: https://stm.bookpi.org/RACAS-V5/article/view/13917
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