Rubber Research Institute of Nigeria, P.M.B. 1049, Benin City, Nigeria.
The yield of ten Hevea progenies derived from hand pollination in a set of 5 x 5 diallel crosses was analysed for combining ability. General combining ability variance (gca) and specific combining ability (sca) variances were highly significant. The gca: sca ratio was 1:2. Two parental clones, PR 107 and RRIM 628, were identified as general combiners with PR 107 being more suitable for the production of synthetic clones.
Combining ability, dialIel cross, Hevea brasiliensis, clone, progenies
