Abstract
ABSTRACTThe objective of our study was to examine the influence of genetic divergence on the ratio of the components of variance for specific (σ2SCA) and general (σ2GCA) combining ability using experimental data in triticale (×Triticosecale Wittm.). In total, 21 lines and their 210 crosses were evaluated for grain yield in field trials. Published molecular data were reanalyzed, indicating an optimum of two subgroups. The estimates of σ2SCA and σ2GCA were determined for the total diallel and between the two subgroups. The ratio of σ2SCA vs. σ2GCA tended to be lower for crosses between than within genetically distinct groups. Our experimental findings can be interpreted as an indicator of a more favorable ratio of σ2SCA vs. σ2GCA in situations with two genetically distinct populations than in situations with populations that are not genetically distinct.
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