Assessing heat tolerance in groundnut (Arachis hypogaea L.) through the MGIDI approach
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Abstract
Groundnut (Arachis hypogaea L.) productivity is constrained by high temperature and drought stress. The present study used the multi-trait genotype-ideotype distance index (MGIDI) to evaluate genotypes under post-rainy conditions and identify heat-tolerant lines. Four superior genotypes (ICGV 07222, ICGV 03043, ICGV 13312, ICGV 03042) were selected with 86.66% success at 15% selection intensity. High selection gains for traits such as pod yield per plant, heat use efficiency, photothermal use efficiency, heliothermal use efficiency, shelling percentage, test weight, canopy temperature, haulm weight and SPAD chlorophyll meter reading highlighted their role as key indicators of heat tolerance.
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