GCA [general combining ability] and SCA [special combining ability] effects and their relationship with the origin of inbred lines in maize (Zea mays L.)
1997
Sfakianakis, J.N. | Katsadonis, N.D. | Evgenidis, G.L. (National Agricultural Research Foundation, Thermi-Thessaloniki (Greece). Cereal Institute)
A total of 126 diallel sets of maize developed by the Cereal Institute of Thessaloniki (Greece) within the maize breeding programme during the years from 1967 to 1983, were analysed for general and specific combining ability (GCA, SCA) effects. In 78 of those diallel sets the GCA was significant at the 0.01 level of significance and in a further 9 in was significant at the 0.05 level significance. The corresponding percentages for the SCA were 40 and 12. Thus, general combining ability seems to be more important than SCA in maize. The genes with additive action seem to play a more important role in the expression of yield than genes with non additive action. The genetic material from which the inbred lines were developed was not of primary importance for the magnitude of GCA and SCA except that of inimproved material which seemed to have a significant effect on the magnitude of SCA.
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