Combining ability studies for yield and yield components in groundnut (Arachis hypogaea)

Combining ability analysis of 20 hybrids developed through line x tester mating design in groundnut. Additive gene action was predominant for all the characters studied except for harvest index and pod yield/plant. The genotypes ICGV 07240 and TVG 0856 recorded significant gca effects along with high mean for plant height, root length, harvest index and pod yield/plant. Hence, these genotypes were categorized as good combiners. Based on the mean and gca effects involving the above parents in crossing programme could result in improvement in pod yield. Among the crosses, ICGV 07240 x JDR 65 registered significant sca effects along with mean. Hence pedigree breeding method could be adopted to isolate desirable recombinants. However, the cross, TVG 0831 x RG 426 involved parents with poor combiners. Hence, biparental mating followed by selection is recommended for the identification of desirable recombinants.