Gene action and combining ability analysis for seed yield and its component traits in linseed (Linum usitatissimum L.)
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Date
2020-10-05
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CSKHPKV Palampur
Abstract
The present investigation entitled “Gene action and combining ability analysis for
seed yield and its component traits in linseed (Linum usitatissimum L.)” was
undertaken in Department of Genetics and Plant Breeding, CSKHPKV, Palampur
during the year 2018-19 and 2019-20 with the objectives to study nature and
magnitude of gene action, combining ability and heterosis to identify potential parents
and crosses for yield and important traits in linseed. The evaluation was done using
fifteen lines and three well adapted genotypes as testers in a line × tester mating
design. From these parental lines, 45 crosses were developed during rabi 2018-19. In
rabi 2019-20 a total of 63 entries (18 parents + 45 F1‟s) were evaluated for seed yield
and its component traits. The non-additive gene action played significant role in the
inheritance of seed yield and its component traits in linseed. The study revealed
higher magnitude of SCA variances over GCA variances. On the basis of combining
ability studies the lines KL-310, KL-316 and K 1 Raja were the best general
combiners for most of the yield related traits and KL-308 was good general combiner
for seed yield and its component traits. Cross KL-312 × K 1 Raja exhibited high SCA
value for seed yield and crosses KL-313 × JRF-4 and KL-308 × K 1 Raja were found
promising for most of yield contributing traits based on per se performance, SCA
effects and magnitude of heterosis. The highest value for heterobeltiosis and heterosis
over standard check were observed for KL-308 × JRF-4 and KL-313 × Nagarkot,
respectively.