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Combining Ability and Heterosis for Capsaicinoids in Capsicum pubescens

2001; American Society for Horticultural Science; Volume: 36; Issue: 7 Linguagem: Inglês

10.21273/hortsci.36.7.1315

2327-9834

Yayeh Zewdie, Paul W. Bosland, Robert L. Steiner,

Agricultural pest management studies

The inheritance of capsaicinoid content was studied in five Capsicum pubescens Ruiz & Pav. genotypes using diallel analysis. General combining ability and specific combining ability effects were significant for all capsaicinoids studied, indicating additive and nonadditive gene actions are present. The association of high capsaicinoid contents with high positive general combining ability of the parents also indicates the predominance of additive gene action in capsaicinoid inheritance. Because of the predominant additive gene effect, recurrent selection would be a good breeding method to increase capsaicinoid level in the population studied. Heterosis was observed in hybrids for some of the capsaicinoids, suggesting that F 1 hybrids could also be used to increase capsaicinoid content.