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Background: Groundnut is a globally significant oil crop. It possesses diversity in the nutritional and medicinal values. Groundnut kernels contain 48%-50% oil, 26%-28% protein and vitamins B and E. Continuous efforts to enhance groundnut productivity is the main driving force for the current study. Methods: Line × Tester analysis was carried out to estimate the gene action of yield and its attributing traits for their improvement. Seven lines viz., VRI 7, VRI 8, VRI 9, VRI 10, K 6, GG 7 and CO 7 and eight testers viz., IGCV 15402, IGCV 15412, IGCV 15432, IGCV 15427, IGCV 15426, IGCV 15408, IGCV 15410 and IGCV 15388 were crossed to obtain 56 crosses. GCA and SCA variance revealed the importance of both additive and non-additive gene action of all the traits. Result: The study observed significantly higher specific combining ability (SCA) variances compared to general combining ability (GCA) variances, indicating a predominant role of non-additive gene action in trait control. Line VRI 7 was observed best GCA, particularly for pod yield and other traits making it a promising variety for pod yield enhancement programs in the future. The SCA for hybrid VRI 8 × ICGV15426 and VRI 7 × ICGV15402 revealed superior performance in terms of pod yield per plant. Notably, the VRI 7 × ICGV15402 cross exhibited outstanding performance across all traits, highlighting the prominence of a parent with strong GCA. The study recommends early-generation selection as a strategic approach for improving groundnut breeding efforts.
Rao et al. (Fri,) studied this question.
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