Abstract

AGUILAR SILVA, Fernando; AGUILAR SILVA, Bernardo  and  GARCIA, Mario Augusto. Generation mean analysis to estimate genetic parameters in a cross of pimenton and cayenne pepper (Capsicum annum L.). Acta Agron. [online]. 2013, vol.62, n.1, pp.73-78. ISSN 0120-2812.

Yield is a complex trait and is under the control of multiple genes in which the environment interfere on the phenotype. The estimation of genetic components, including non-allelic interactions acquire a great importance on the breeding of a crop. The objective of this study was to estimate the genetic parameters for yield, using generation means analysis (P₁, P₂, F₁, F₂, BC₁ and BC₂) derived from the cross of Pimenton Serrano and Aji Cayenne 958 (inbreed lines of Capsicum annuum). The analysis revealed that additive, dominance and the non-allelic interactions components were significantly for the phenotypic expression, indicating the need for a four-parameters model.Additive by additive [i] effects revealed significance for fruit weight. Recessive or double recessive epistasis, was found. Finally, a breeding program based on recurrent selection to increase the average yield in a pepper (Capsicum annuum) population can be used, due to the epistatic interaction can be effectively exploited through the hybridization among promissory lines.

Keywords : Additive; dominance; epistasis; gene action; heritability.

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