Inheritance of drought tolerance in post rainy season sorghum (Sorghum bicolor L. Moench)

Abstract

The significance of scaling tests A, B, C and D in the cross viz., CSV-29R x CRS-19 for the traits related to drought tolerance indicated the presence of all three non-allelic interaction effects under non stress and moisture stress conditions. The joint scaling test was also found significant for all the characters under both condition indicating inadequacy of Additive-dominance model and presence of higher order interactions. Under non stress condition, the dominant component (h) and additive x additive (i) gene interaction for the cross CSV-29R x CRS-19 was found significant for the characters viz., dry fodder yield and grain yield per plant. While under moisture stress condition, dominant component (h) and additive x additive (i) gene interaction for the cross CSV-29R x CRS-19 was found significant for the characters viz., dry fodder yield, grain yield and harvest index.