Combining Ability Analysis for Seed and Seedling Traits in Indigenous Maize (Zea mays L) Germplasm of Himachal Pradesh
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Author:Sanjeev Kumar Jagdish Kumar and Kiran
p-ISSN:0024-9602, e-ISSN:2582-5321, Vol:99, Issue:oct-dec
DOI: https://doi.org/10.29321/MAJ.10.100162
Abstract
Experiments were conducted to identify the best parents and hybrids for gca and sca effects
in maize under mid hill conditions of Himachal Pradesh. Females and males were crossed in
Line x tester analysis involving 24 females and 3 males from adverse origin. The study
revealed that dominance component of variance (σσσσσ2
D
) was greater than additive component
(σσσσσ2
A
) for all the characters during both years as well as when combined over years. Six lines
viz., 4, 8,11,13,17 and 23 performed consistently better for important seed and seedling traits,
such as accelerated aging test, osmotic stress test, 100-seed weight, 100-seed volume,
germination percentage and field emergence. Two cross combinations viz., line-5 x Early
Composite and line-17 x Early composite were observed to be promising as these revealed
significant and positive SCA effects for two most important features of drought tolerance
viz., accelerated aging test and field emergence. Among testers, early composite showed
desirable gca effects for 100 seed weight, 100 seed volume and field emergence.
Key words : Combining ability, gene action, seed quality traits