Gene effects for grain yield and related attributes in Triticum durum

Abstract

Six generations namely P1, P2, F1, F2, BC1 and BC2 of the three crosses namely, CMH74.540 x PDW245 (C1), CMH74.540 x PDW274 (C2) and CMH74.540 x PDW277 (C3) were raised in a compact family block design with three replications. Ten randomly selected plants each of P1, P2 and F1, 40 plants of F2 and 20 plants each of BC1 and BC2 generations were used for recording observations, on quantitative characters namely, seed yield, 100-grain weight, grains per spike, effective tillers per plant, spike length, plant height and days to flowering. The data recorded were subjected to weighted analysis of Cavalli [1] to know the adequacy of additive-dominance models. The estimates of gene effects on six parameter model were obtained using the generation mean analysis model of Jinks and Jones [2].