ESTIMATION OF SOME GENETIC PARAMETERS IN BREAD WHEAT CROSSES USING DIALLEL ANALYSIS

doi:10.12816/ejpb.2019.256693

ESTIMATION OF SOME GENETIC PARAMETERS IN BREAD WHEAT CROSSES USING DIALLEL ANALYSIS

Document Type : Original research

10.12816/ejpb.2019.256693

Abstract

A half diallel analysis of eight bread wheat, parents [Shandaweel 1(P1), Sids 12 (P2), Giza 168 (P3), Gemmiza 9 (P4), Sids 4 (P5) as local cultivars and three lines (Line 11(P6), Line 13(P7) and line 26 (P8)) from (CIMMYT)]. The 28 F₁ and 28 F₂ which were drived from the crosses between the parents, were carried out at Mallawy Agricultural Research Station, ARC, during three successive seasons of 2013/2014, 2014/2015 and 2015/2016 to estimate the genetic prameters of flag leaf area (cm²), grain filling rate (g day^-1), no. of spikes plant^-1, no. of kernels spike^-1, grain yield plant^-1 (g) and 100-kernel weight (g). The analysis of variance revealed that mean squares due to genotypes were highly significant for all of these characters. Also, the non-additive gene effect was important than the additive gene effect for most traits. The degree of dominance was over-dominance for all traits except for no. of kernels spike^-1 was partial dominance. Moderate narrow sense heritability was observed in all traits in F₂ generations. The lowest value of inbreeding depression was observed in cross Sids 12×Giza 168. Grain yield plant^-1 had strong correlation with grain filling rate and no. of spikes plant^-1, and also between flag leaf area and 100-kernel weight. The parent Sids 12 had a maximum domininat genes for flag leaf area, grain yield plant^-1, no. of spikes plant^-1, 100-kernel weight and grain filling rate, beside Line 13 for grain filling rate. These two promising genotypes can be used as a donors in multiple traits breeding programme to develop high yielding wheat genotypes.