Indian Society of Genetics & Plant Breeding

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COMBINING ABILITY ANALYSIS OF HARVEST INDEX AND ITS COMPONENTS IN SORGHUM

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Genetics of harvest index and its components was studied follOWing diallel approach.
Seven genotypes having three maintainer of cytoplasmic genetic male sterile lines~ two
improved varieties and one each improved local variety and restorer of CSH-10 were
selected for crossing in half diallel fashion. Pooled combining ability analysts revealed that
harvest index, grain yield and its related characters were governed by both additive and
nonadditive gene action. Maintainer lines 296 B, M-9 Band 20Tl B were identified as most
desirable general combiners for harvest index. Improved varieties Spy 472, SPY 475 and
Vidisha 60-1 were identified as desirable combiners for grain yield. The cross combination
Spy 475 x M·9 B was superior for harvest index and grain yield on the basis of sea effects.
Hybrids with high harvest index and productivity can be bred by using lines already
improved for these traits.
 

Keywords: Combining ability, gene action, harvest index.

Info

Year: 1992
Volume: 52
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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