Evaluation of Advance Mutant Genotypes and Interrelationship Analysis of Yield and Yield Associated Traits in Bread Wheat Genotypes

Abstract

The current experiment was carried out to evaluate the advance mutant genotypes for yield and yield associated traits in bread wheat (TriticumaestvumL.) genotypes and also to analysis the interrelationship between the quantitative traits. In this regard, M4 mutant lines fromMarvi and Sassui varieties were sown along with two check varieties viz. NIA-Amber and NIA-Saarangat Nuclear Institute of Agriculture, Tandojam during the rabi season 2014-15. The analysis of variance showed that all the genotypes performed significantly different for all the studied traits except biological yield plot-1, signifying that studied materials possess useful genetic variability for traits studied thus can comprehensively be exploited for forthcoming breeding programs. On the basis of mean performance, the Marvi-mutant demonstrated better performance for a range of characters hence can be exploited as a parental line for future breeding programs. The results demonstrated significantly (P≤0.05) positive association between various traits, such as days to 75% heading made positive and significant correlation with days to maturity (0.93**). The character spike length demonstrated positive and significant association with grain yield plot- 1 (0.852*). The trait spikelets spike-1exhibitedsignificantly positive correlation with grain yield plot-1 (0.872*), whereas grains spike-1 also made positive and significant correlations with grain yield plot-1(0.825*) and grains weight spike-1 (0.902*). The trait main spike weight developed significantly positive association with grains spike-1 (0.896*), spikelets spike-1 (0.849*), seed index (0.855*) and grains weight spike-1 (0.961*). The trait seed index also established positive and significant correlations with grains weight spike-1 (0.820*) and grain yield plot-1 (0.888*). Moreover, there was also a positive and significant correlation (0.947**) between harvest index and grain yield plot-1.The characters spike length, spikelets spike-1, grains spike-1 and main spike weight showed significant and positive associations with grain yield plot-1, demonstrating a comprehensive selection for these traits will ultimately improve seed yield in bread wheat genotypes