Indian Society of Genetics & Plant Breeding

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COMBINING ABILITY IN RABI SORGHUM (SORGHUM BICOLOR L. MOENCH)

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Combining ability effects and variances were estimated in Fl over three different
environments. The mean squares due to gca and sca were highly significant in individual
environments as well as pooled over environments, for all the traits. The estimate of
interaction component gca x environment and sea x environment was significant for all the
traits except days to flowering. However, the interaction component due to gca x
environment variances showed higher values as compared to the sca x environment
variances. It shows that the additive variance X environment interaction was more as
compared to nonadditive variance X environment interaction. The parent Spv-422 and
Spv-438 contributed favourable genes for earliness, plantheight, while Spv-438, Spv-86 and
Spv-41 were good general combiners for grain yield, numberofprimaries, and secondaries,
250 grain weight, and fodder yield. The crosses involving good x good and good X poor
combiners threw more productive lines. Diverse good combiners should be used in
hybridization and the resultant material should be exposed to different environments for
identifying the stable high yielding genotypes.
 

Keywords: Combining ability, rabi sorghum.

Info

Year: 1992
Volume: 52
Issue: 1
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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