Combining Ability Analysis of Harvest Index and Some Components of Harvest Index in Sorghum

Six genotypes of sorghum, selected on the basis of maturity duration, plant height, and grain yield, were crossed in half-diallel fashion. Combining ability analysis revealed that mean sum of squares of gca and sca were significant for days to 50% flowering, harvest index, dry wt. of leaves and stem, primary branches/panicle, and grains/primary branch. Varieties SPV 472 and SPV 475 were identified as desirable combiners for harvest index on the basis of their gca effects. Crosses SPV 472 × 2077 B and SPV 475 × 2219 B were superior combinations for this character on the basis of their sca effects.