GENETIC DIVERSITY IN SUMMER GROUNDNUT (Arachis hypogaea L. )
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Date
2014
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Mahatma Phule Krishi Vidyapeeth, Rahuri.
Abstract
The present investigation entitled “Genetic diversity in
summer groundnut (Arachis hypogaea L.)” was undertaken to
estimate the genetic variability, path analysis, correlation
between dry pod yield and other yield contributing characters
and genetic divergence on forty nine germplasm lines and one
check of summer groundnut. Total 50 genotypes were evaluated
during summer, 2013 season in a randomized block design with
two replications at All India Co-ordinated Research Project on
Groundnut, Mahatma Phule Krishi Vidyapeeth, Rahuri, Dist.
Ahmednagar (M.S.).
Observations were recorded on the traits viz., days to
50% flowering, days to maturity, number of branches per plant,
number of immature pods per plant, number of mature pods per
plant, dry pod yield per plant, hundred kernel weight, oil percent, protein percentage, shelling percentage, harvest index,
sound mature kernels, plant height, peg to pod ratio, number of
pegs per plant and dry haulm yield per plant.
The treatment differences were statistically significant
for all the characters except peg to pod ratio and also the
magnitude of genotypic and phenotypic coefficients of variations
indicated the presence of good amount of variability. The
character number of pegs per plant showed the highest
heritability followed by dry pod yield per plant, number of
mature pods per plant, dry haulm yield per plant, number of
immature pods per plant, harvest index, plant height, number of
branches per plant, hundred kernel weight, days to 50%
flowering, peg to pod ratio, shelling percentage, sound mature
kernels and oil percentage. Other characters recorded moderate
to low heritability. The number of pegs per plant showed the
highest genetic advance. Other characters showed moderate to
low genetic advance. dry pod yield per plant indicating the true and perfect
association between these characters and dry pod yield. The
correlation and path analysis studies revealed that number of
mature pods per plant, peg to pod ratio, days to maturity and
days to 50 % flowering as good indications of dry pod yield in
groundnut. Other characters such as oil percentage and protein
percentage may be considered while selecting genotypes for high
yield.
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