R.K. Mahawar*, Rajesh Kumar, Khajan Singh, Rajendra Kumar Yadav and Hanuman Singh
*Department of Genetics and Plant Breeding, College of Agriculture, Ummedganj,
Agriculture University, Kota (Raj.) 324001
Email: rajeshaukota@gmail.com
Received-03.09.2023, Revised-14.09.2023, Accepted-25.09.2023
Abstract: Twenty eight hybrids developed from eight genotypes of linseed through diallel mating design (excluding reciprocal) were evaluated in randomized block design with three replications for twelve distinct morphological characters, during rabi season of 2019-20, at Agriculture Research Station, Ummedganj, Kota, to estimate the general combining ability (GCA) of the parents and specific combining ability (SCA) for the development of high yielding varieties. Significant General Combining Ability (GCA) and Specific Combining Ability (SCA) effects were noted for all the traits.PA 2 was good general combiner for seed yield per plant along primary branches per plant and test weight; and KBA 3, KBA 4 and Padmani were good general combiner for oil content. In addition to above trait, KBA 3 for biological yield per plant, test weight; KBA 4 for days to 50 per cent flowering, days to maturity, plant height and capsule per plant and Padmani for days to 50% flowering, days to maturity and plant height were also found good general combiner. Among the hybrids, RL 15582 x KBA 4 showed highest significant SCA effects in positive direction for seed yield per plant followed by RL 15583 x KBA3 and Padmani x RL 13161 These hybrids also exhibited significant desirable SCA effects for days to maturity, number of capsules per plant. In addition to above, hybrids, RL 15582 x RL 15583 exhibited highest significant SCA effects in positive direction for oil content followed by Meera x RL13161 and Padmani x KBA 4. These hybrids also exhibited significant desirable SCA effects for other related traits, indicating potential for exploiting hybrid vigour for seed yield and oil content in breeding programme to throw higher frequency of desirable segregants to develop high yielding linseed varieties.
Keywords: Combining ability, seed yield, GCA, SCA, linseed
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