Indian Journal of Genetics and Plant Breeding (The)
SCOPUSWeb of Science
  • Year: 2026
  • Volume: 85
  • Issue: 4

Assessing heat tolerance in groundnut (Arachis hypogaea L.) through the MGIDI approach

  • Author:
  • R. J. Shreeraksha3, Spurthi N. Nayak3*, Babu N. Motagi1, Ramesh S. Bhat3, S.K. Prashanthi3, Janila Pasupuleti2
  • Total Page Count: 4
  • Page Number: 671 to 674

1All India Co-ordinated Research Project on Groundnut, College of Agriculture, University of Agricultural Sciences, Dharwad580 005, Karnataka, India

2International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad500 030, Telangana, India

3Department of Biotechnology, College of Agriculture, University of Agricultural Sciences, Dharwad580 005, Karnataka, India

*Corresponding Author: Spurthi N. Nayak, Department of Biotechnology, College of Agriculture, University of Agricultural Sciences, Dharwad580 005, Karnataka, India, E-Mail: nayaksn@uasd.in

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.

Keywords

Groundnut, heat-stress tolerance, Multi-trait Genotype Ideotype Distance Index (MGIDI), selection gain, superior genotype, selection