GENE EFFECTS FOR THE ROOT CATION EXCHANGE CAPACITY OF SORGHUM BICOLOR (L.) MOENCH

Abstract

Six generations, viz., PI, P2, FI, F2, BCI and BC2 of crosses SPY 346 x SPY 351,2219 B x CS 3541 and Vidisha 60-1 x CS 3541 were grown at Indore. Significant differences were observed among the generation means for root CEC. Estimates of six components of generation means, viz., m, d, h, i, j and I were obtained for grain yield, 1000-grain weight, and root CEC. Additive gene effects alone were important for root CEC of the cross Vidisha 60-1 xCS3541. On the other hand, nonadditive gene effects were predominant for rootCEC in the remaining two crosses. Only additive gene effects governed the inheritance of grain yield in the cross Spy 346 x SPY 351. However, for the cross 2219 B x CS 3541, the estimate ofh was many times higher than for other components. For1000-grain weight, predominant gene effects were nonadditive.