GENETIC VARIABILITY AND CORRELATION STUDIES IN WHEAT ADVANCED LINES FOR YIELD IMPROVEMENT
Abstract
The current research was conducted with the objective to estimate evaluation of variability, genetic advance and correlations in wheat. Sixty-four wheat advance lines were grown in alpha lattice designed during 2022-2023 at Cereal Crops Research Institute (CCRI), Pirsabak Nowshera, Pakistan. Significant differences among genotypes were recorded shown through analysis of variance. For majority of the variables, significant differences among genotypes were recorded shown through analysis of variance. Days to maturity ranged from 164 days to172 days, spike length ranged from 9cm-12cm, spike weight ranged from 3-5 g, spikelet per spike ranged from 16-23, peduncle length ranged from 40-16 cm, chlorophyll content ranged from 42-55 and grain yield from 3240 kg/ ha to 6051 kg/ ha. Genetic variance is higher than environmental variance for the traits. Regarding values highest heritability recorded for peduncle length (0.83), while lowest heritability recorded for days to maturity (0.79). Maximum phenotypic coefficient of variation value recorded for spike weight (15.69), while for days to maturity recorded value was (0.88) while lowest value recorded for grain yield (0.27). Maximum value of genetic gain recorded for peduncle length (5.48) and it was minimum for spike weight (0.61). The findings indicated strong and positive link spikelet per spike and spike length. This indicates that early maturity of wheat may affect yield since the plant may not have enough time to develop the necessary expression.
Keywords
- Wheat, correlation, genetic coefficient of variation, phenotypic coefficient of variation, genetic advance, variability.
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