PJB-2020-173
Elucidating genetic diversity of heat tolerance contributing physiological traits in Maize at two temperature regime
Ishrat Ramzan
Abstract
An experiment was performed to determine the genetic diversity of heat tolerance contributing physiological traits in sixty maize genotypes at National agricultural research centre, Islamabad and research field of Plant Breeding and Genetics Department, Gomal University, D.I.Khan during the autumn season, 2017 in Randomized Complete Block design with three replications. These genotypes were evaluated for grain yield, chlorophyll contents, membrane stability index, leaf relative water content and proline content were recorded in five randomly selected plants in each replication. Genetic characterization of studied attributes revealed genotypes were containing marked variation. Higher genetic coefficient values, heritability along with genetic advancement were observed for grain yield. Chlorophyll contents, leaf relative water content and membrane stability index also showed higher values of heritability. Genotype 60, 30 and 21 performed well at both locations for studied attributes which can be utilized further for developing heat-tolerant hybrid.
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