Combining Ability Studies For Yield And Water Use Efficiency Traits In Groundnut (arachis Hypogaea L.)

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K. JOHN* AND P. RAGHAVA REDDY

Regional Agricultural Research Station, Tirupati-517502, Andhra Pradesh, India

ABSTRACT

Line × tester analysis was performed using six lines and four testers for yield and water use efficiency traits in groundnut. The gca variances were highly significant for all the characters studied except specific leaf weight. The parent ICGV-91114 proved to be a good general combiner for root length and pod yield per plant. TAG-24 is also a good general combiner for SPAD chlorophyll meter reading at 60 DAS, specific leaf area at 60 DAS, relative water content at 40 DAS and harvest index. The crosses viz., TAG-24 × TMV-2 for SPAD chlorophyll meter reading at 60DAS, Prasuna × Dharani for SPAD chlorophyll meter reading at 40 DAS. Among the hybrids, Narayani × Dharani had recorded superior sca effect for pod yield per plant. This cross was derived from high × low (or) high × medium gca parents. Hence, these cross would be used for further selection to obtain high yielding seggregants.

KEYWORDS:

General combining ability, Specific combining ability, Water use efficiency, Groundnut

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