Indian Society of Genetics & Plant Breeding


Genetic association and frequency distribution in segregating generations derived from pigeonpea crosses

Published on Jun 01, 2018 03:39 AM

Correlation and presence of genetic interactions was
studied using F2 and F3 generations in three pigeonpea
crosses for yield and its component traits. Most of the
characters studied were positively skewed and were being
governed by several genes indicating quantitative
inheritance. Variance, skewness and kurtosis have also
indicated that homozygosity has increased over the
generation in pigeonpea crosses. Cross BRG 1 x ICP 8863
was found better than other two crosses (TTB 7 x ICP 8863
and TTB 7 x ICPL 87119) in providing high yielding
segregants displaying parental diversity. Seed yield and
other associated characters such as plant height and
number of pods per plant had complementary gene action
with other genes governing these characters. Yield increase
is possible by following rigid selection for yield and its
component characters. A shift in correlation coefficients
between the generations was recorded which is likely to
be attributed to difference in gene complementation of
linkage blocks and an indication of unstable nature of
breeding population.

Keywords: Correlation, skewness, kurtosis, gene interaction, pigeonpea


Year: 2016
Volume: 76
Issue: 2
Article DOI: 10.5958/0975-6906.2016.00022.5
Print ISSN: 0019-5200
Online ISSN: 0975-6906


B. C. Ajay info_circle
M. Byregowda info_circle
G. N. Veerakumar info_circle
K. N. Ganapathy info_circle
Murlidhar Meena info_circle
H. Prashanth Babu info_circle
M. Reena info_circle
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