Combining ability for yield and fruit quality in the pepper Capsicum annuum

Abstract

ABSTRACT. The objective of this study was to determine the effects of the general and specific combining abilities (GCA and SCA, respectively) of 15 characteristics and to evaluate the most promising crosses and the reciprocal effect between the hybrids of six parents of the Capsicum annuum species. Six parents, belonging to the Horticultural Germplasm Bank of Centro de Ciências Agrárias of Universidade Federal da Paraíba, were crossed in complete diallel manner. The 30 hybrids generated and the parents were then analyzed in a completely randomized design with three replicates. The data were submitted to analysis of variance at 1% probability, and the means were grouped by the Scott-Knott test at 1% probability. The diallel analysis was performed according to the Griffing method, model I and fixed model. Both additive and non-additive effects influenced the hybrids' performance, as indicated by the GCA/SCA ratio. The nonadditive effects, epistasis and/or dominance, played a more important role than the additive effects in pedicel length, pericarp thickness, fresh matter, dry matter content, seed yield per fruit, fruit yield per plant, days to fructification, and total soluble solids. The GCA effects were more important than the SCA effects in the fruit weight, fruit length and diameter, placenta length, yield, vitamin C, and titratable acidity characteristics. The results found here clearly show that ornamental pepper varieties can be developed through hybridization in breeding programs with C. annuum.

Research Article Genetic effects of in vitro germination and plantlet development in chilli pepper.

“…In addition, we found significant reciprocal effects for all studied characters. According to by Rêgo et al (2009) and Nascimento et al (2014), in the traits where non-additive variances were important (germination percentage, deformed seedlings percentage, root number, hypocotyl length, hypocotyl width, definitive leaf number, leaf length and leaf width), there was an additional opportunity for developing F 1 hybrid.…”

“…Diallelic crosses has been more used to study genetic control of morphological and agronomical traits but not to in vitro plant development for chili peppers (Rêgo et al, 2009;Schuelter et al, 2010;Nascimento et al, 2014). In a previous study, Rêgo et al (2015b) and Medeiros et al (2015) analyzed the germination percentage inheritance and plantlet development by Hayman's diallelic analysis.…”

“…Also critical is the knowledge of genetic control of the desirable traits Rêgo et al, 2016). The diallel analysis estimates the general and specific combining ability and other useful genetic parameters, helping the breeders in the selection of best parents and crosses (Rêgo et al, 2009(Rêgo et al, , 2016Nascimento et al, 2014).…”

Assessment of combining ability for yield and quality components in hot pepper (Capsicum annuum L.)

“…Even though increase in cultivation and commercialization of hot pepper in the last few years (Nascimento et al, 2014) there is increasing demand in India for new cultivars that have higher yield, quality, pest and disease resistance, all of which can be achieved through breeding programmes.…”

“…It gives additional information on presence or absence of epistasis, average degree of dominance and distribution of dominant and recessive genes in the parents (Rego et al, 2011;Nascimento et al, 2014). Application of diallel techniques to selfpollinated crops for improving yield and quality may be appropriate (Griffing, 1956).…”