Indian Society of Genetics & Plant Breeding

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COMBINING ABILITY AND HETEROSIS STUDIES IN FORAGE SORGHUM (SORGHUM BICOLOR (L.) MOENCH) ACROSS ENVIRONMENTS

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Combining ability analysis through a line X tester set for 9 forage characters in four
environments and on pooled basis revealed the importance of both additive and
nonadditive gene actions. However, the ratio of c:rgea/c:r sea showed greater importance of
nonadditive gene action. The parental genotypes 2077A, 36A and M·31·2Aamong females
and Vidisha, IS 4776, IS 644, Rio, IS 3287 and IS 685 among males showed the highest gca
effects, whereas the crosses 2077A x Vidisha, M·31·2A x IS 3353, 2219A x IS 4776 M-31·2A
XRio, 2219 A x IS 3287, and CK GOA x IS 4776 among hybrids exhibited the highest and
significant sca effects for yield and its components. While gca was stable for fodder yield
and number of yield components, sca was highly unstable for all the characters across the
environments. Highly significant but varying degrees of heterosis was observed for the
characters under study.
 

Keywords: Sorghum bicolor, combining ability, heterosis.

Info

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

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