Effect of Early Moisture Stress in Recombinant Inbreds and Identification of Moisture Stress Tolerant Groundnut Lines based on Statistical Approaches

Author: Bharath Kumar P. Jambagi*, Savithramma, D. L., Santosh G. M. and Shailja Chauhan

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Abstract

Groundnut (Arachis hypogaea L.) is an important oil seed crop mainly grown under rainfed situation. Pod yields are generally hampered due to erratic rainfall and frequent drought during the crop growth period under rainfed conditions. Drought during critical crop growth stages is crucial for loss in yield of groundnut varieties. But tolerant genotypes may give better yield due to maintenance of physiological responses that were triggered during drought. Drought tolerance enhancement requires dependable estimate of drought tolerance potentials among the genotypes. In order to appraise drought stress in groundnut, a mapping population of 147 recombinant inbred lines (RILs) derived from the cross NRCG 12568 × NRCG 12326 were evaluated under moisture stress and non-stress field environments. The stress was imposed by withholding irrigation from 30-45 DAS to investigate relationships and repeatability among fifteen drought tolerance indices. Based on correlation and discriminating ability

Keywords

Moisture stress, Drought tolerant indices, Principal component analysis, Groundnut.