Indian Society of Genetics & Plant Breeding

Genetic analysis of early and medium duration pigeonpea [Cajanus cajan (L) Millsp.] crosses involving wilt resistant donor in F1 and F2 generations

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The experiments consisting 55 crosses of pigeonpea made
in tJalf-dialiel design along with 11 parents in F
1 and F2
generations were conducted on vertisol under rain-fed
condition. Genetic analysis revealed that both additive
and non-additive genetic components of variance governed
the expression of seed yield, pods per plant, pod clusters
per plant and plant height, latter being predominant in
both the generations. Stem girth and number of primary
branches per plant were predominantly under the control
of additive genetic components with significant role of
non-additive genetic component. Whereas 100 seed weight
was predominantly under the control of additive genetic
components. Medium maturing parents, a wilt resistant
viz., ICPL 87119 and JKM-7 were identified as good
general combiner for seed yield and most of the
contributing traits in both F
1 and F2 generations except
ICPL 87119 in F
2 generation for grain yield. Pant 142 was
identified as good general combiner for earliness and
grain yield in both the generations. These genotypes can
be used in future breeding programme to exploit additive
component of genetic variation to develop high yielding
wilt resistant variety in medium maturing group. Cross
combination showing significant specific combining ability
effects possessed different maturity group parents with
either one or both good general combing parents. Pant
142 x ICPL 87119, GAUT 8630 x ICPL 87119, Pant 142
x KM 84 and GAUT 9002 x ICPL 87119 recorded to be
better cross combinations for yield and one or more
attributing traits.

Keywords: Pigeonpea, diallel cross, wilt resistant donors, genetic variances


Year: 2005
Volume: 65
Issue: 3
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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