OAR@ICRISATProspects for utilization of genotypic variability for yield improvement in groundnut. R CNageswara RaoauthorA KSinghauthorL JReddyauthorS NNigamauthorResearch on groundnut (Arachis hypogaea) physiology at ICRISAT Asia Centre indicated substantial variation among genotypes for desirable traits such as water use efficiency (WUE), partitioning of dry matter to pods and efficient root systems. However, measurement of these traits was complex and laborious. Significant correlations amongst WUE, carbon isotope discrimination in leaf and specific leaf area (SLA) suggested that carbon isotope discrimination in SLA could be used to identify genotypes with high WUE. The adaptation of improved genotypes to varied environments is one of the major problems in groundnut improvement programmes. Significant genotype × environment interactions were noted, but there was little emphasis on understanding and exploiting variability for specific adaptation. There is scope for yield improvement in groundnut by selecting for physiological attributes contributing to yield advantage in a given environment and combining them to enable further identification of genotypes with desirable combinations of traits. Scope also exists to enhance productivity of groundnut by developing varieties with specific traits to match agroclimatic requirementsGroundnut1994Indian Society of Oilseeds ResearchArticle

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