Vol. 11, Issue 7 (2022)

Author(s):
Avtar Singh and Dr. Harmeet Singh Janeja

Abstract:
Thirty-seven advanced segregating wheat populations (provided by BISA- CIMMYT) along with three check varieties were screened for yellow rust resistance and genetics of variability. Yellow rust screening revealed that four genotypes were immune to yellow rust, five were resistant and seventeen genotypes were moderately resistant. However, nine genotypes showed moderate susceptibility and only two genotypes were 100% susceptible to yellow rust. High PCV and GCV were observed for yellow rust resistance and moderate PCV and GCV were observed for the number of spikes per plant and grain yield per plant whereas low values for the rest of the traits.. High heritability along with high GA were observed in yellow rust resistance, plant height, no of spikes and biological yield, which indicates these characters were governed by additive gene effect therefore efficient for selection. Correlation analysis revealed that a highly significant positive correlation of grain yield per plant was observed with number of spikes/plants, biological yield, and harvest index at both genotypic and phenotypic levels. Number of spikes per plant had the highest positive direct effect on grain yield per plant, followed by days to maturity, yellow rust scoring and thousand-grain weight.