Breeding indicators for high-yielding field pea under normal and heat stress environments

The warming Canadian summers have become a major abiotic stress to crops, including pea. In the past decade, attempts were made in understanding of heat effect and genomic mapping for heat-responsive traits field this study, new recombinant inbred line population (PR-24) consisting 39 lines was tested 6 trials 2020 (near normal weather conditions) 2021 (hot/dry conditions). PR-24 phenotyped days flowering (DTF), maturity, plant height, lodging, yield components, plot yield, seed quality traits. Plant height could be an effective indicator prediction, because its correlation with significantly positive all six despite varying degrees drought stress. Under summer conditions 2020, relatively late maturity correlated greater yield; under heat/drought 2021, successful pod development on main stem important final yield. Linkage used dissect regions associated measured Four QTLs identified over multiple trials, one each DTF (chromosome 7), reproductive node number 5), 2), protein concentration 5). Furthermore, two indices, i.e., tolerance index geometric mean previously assessment validated as useful criteria study.