1Dept. of Genetics & Plant Breeding, Navsari Agricultural Univesity, Navsari, Gujarat, India
2Dept. of Genetics & Plant Breeding, SDAU, Sk Nagar, Gujarat, India
3Centre of Excellence for Research on Wheat, Vijapur, SDAU, Sk Nagar, India
Department of Genetics & Plant Breeding, Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushinagar, Gujarat-385 506, India
*For correspondence-jitudapke@gmail.com
Online published on 27 July, 2017.
The objective of this study was to estimate gene effects and genetic variability for some quantitative traits of three bread wheat crosses (GW 395 × HI 1556, PHR 1012 ×GW 366 and GW 411 × VL920) by generation mean analysis. In most cases a digenic epistatic model was sufficient to explain variation in generation means. The additive-dominance model was adequate for number of effective tillers per plant, Grain yield per plant and days to 50 per cent heading. In some cases these models failed to explain variation in generation means, implying the presence of higher order interactions or interactions between linked loci. The traits viz., days to heading, days to maturity, plant height, grains per spike and 100-grain weight were controlled by both additive and non-additive type of gene actions. Whereas, the dominance together with epistatic gene effects was found to play major role in the expression of grain yield per spike. The adequacies of certain modes of inheritance as well as the importance and significance of gene effects and genetic components of variance for analyzed traits were dependent upon the particular crossing combination and experimental site.
bread wheat, gene effects, additive, non additive, dominance
