Inheritance of flower traits in ornamental pepper

Abstract

Diallel crosses provide estimates of useful parameters in the selection of parents for hybridization. They also help in understanding the gene action behind the determination of characters of interest. The objective of this study was to determine the genetic control of flower traits in ornamental pepper based on a complete diallel with parents F1’s and reciprocal crosses. The experiment was conducted in a greenhouse at Laboratório de Biotecnologia Vegetal, Centro de Ciências Agrárias, Universidade Federal da Paraíba (CCA-UFPB). Seven accessions of ornamental pepper belonging to the CCA-UFPB Germplasm Bank UFPB001, UFPB004, UFPB77.3, UFPB099, UFPB134, UFPB137 and UFPB390 were used. The morphological analysis was performed on following quantitative Capsicum descriptors: days for flowering (DFL), flower diameter (FD), petal length (PL), number of petals (NP), number of stamens (NS), anther length (AL) and fillet length (FL). The data were previously submitted to analysis of variance and then to diallel analysis. All evaluated traits were adequate to the additive-dominant model. There are possibilities of genetic gains in breeding programs, for the NP, NS, AL and FL in ornamental peppers.

General and Specific Combining Abilities for Flower Characters of Capsicum annuum L.

“…The additive effects of the genes have been predominant for most of the flower characteristics and the non-additive effects were higher only for the days for flowering character. In relation to this, Pessoa et al [28] found that the additive effects influenced the performance of the hybrids for the characteristics of flowers in ornamental pepper. Santos et al [29] in a study with C. annuum for ornamental pepper, found a similar result to that work, and identified the control of the additive effects for the characteristic corolla diameter.…”

Phenotypic and Molecular Characterization of Brazilian Capsicum Germplasm

“…In order for one to make the accessions of a germplasm bank available for use in improving characteristics and launching new cultivars, it is essential that they be properly described [16,17]. In this sense, Capsicum germplasm characterization studies have been based on predictive methods that take into account agronomic, physiological, morphological, bromatological, and molecular descriptors [18][19][20][21]. The study of morphological characters associated with molecular markers has been used by many studies because they provide more accurate genetic information of the genotypes studied [22].…”