ANALYSIS OF DIALLEL CROSS FOR SOME VEGETATIVE TRAITS IN CHILI PEPPER
The combining abilities for vegetative plant traits in pepper (C. annuum) were examined to understand the type of gene action governing these traits and to identify genotypes suitable for use as parents in Capsicum genetic breeding program.
The F1 hybrids including reciprocals from a six-parent diallel cross along with the parents were evaluated in a complete randomized design with three replications.
Data were recorded from the following traits: seedling stem length (SSL), seedling stem width (SSW), plant height (PH), plant canopy diameter (CD), plant stem length (PSL), leaf density (LD), leaf length (LL), leaf width (LW), corolla length (CL), anther length (AL), filament length (FL) and days to flowering (DF). The analysis of variance for all characteristics indicated significant differences among genotypes.
The GCA, SCA and reciprocal effects exhibited significant differences (P≤0.05) for almost all characteristics, excepted AL. In order to reduce plant size and based on GCA effects, the best genotypes to be used as parental in crosses are 01 and 137. On the other hand, analyzing the flower traits, genotypes 132 and 134 showed the best GCA and would increase these characteristics.
Genotypes 77.1and 77.2 presented high GCA for CD and LD. Moreover, the lineage 77.2 was highlighted for reduce the number of days to flowering.
Both additive and non-additive effects influenced the hybrids performance.
Ramalho do Rêgo, E., Monteiro do Rêgo, M., Costa, F.R., do Nascimento, N.F.F., Nascimento, M.F., Barbosa, L.A., Fortunato, F.L.G. and Cortez dos Santos, R.M. (2012). ANALYSIS OF DIALLEL CROSS FOR SOME VEGETATIVE TRAITS IN CHILI PEPPER . Acta Hortic. 937, 297-303
DOI: 10.17660/ActaHortic.2012.937.36
https://doi.org/10.17660/ActaHortic.2012.937.36
DOI: 10.17660/ActaHortic.2012.937.36
https://doi.org/10.17660/ActaHortic.2012.937.36
general combining ability, specific combining ability, chili pepper breeding, ornamental
English
937_36
297-303