Abstract

CAMPOSECO MONTEJO, Neymar et al. Estimation of the combining ability of husk tomato populations. Rev. Mex. Cienc. Agríc [online]. 2015, vol.6, n.3, pp.437-451. ISSN 2007-0934.

Husk tomato Physalis ixocarpa Brot, is one of the most important horticultural species in Mexico, the limited number of hybrids and improved high-yielding varieties, demands the search of genotypes with high general combinatory aptitude (ACG) and specific combinatory aptitude (ACE) for the development of varieties or better hybrids. The objective was to estimate the ACG and ACE in UAN CC-S2, UAN CPP-S2, UAN SE3 populations and Rendidora variety; six direct crosses and six reciprocal, according to the i method Model 2 from Griffing. The crosses were conducted in fall 2012 and the evaluation of parents and hybrids during spring-summer 2013, in the towns of Saltillo and General Cepeda Coahuila, under an experimental arrangement randomized blocks with three replications. The combined statistical analysis allowed identifying significant differences in crosses, ACG, ACE, maternal effects (EM) and reciprocal effects (ER), in yield and yield components, populations UAN CPP-S2 and UAN SE3 were identified with high values of ACG. The three crosses were outstanding; UAN CC-S2 x Rendidora (26.25 t ha^-1) and ACG (-5.718) <ACE (6.925) therefore it is recommend to use it as hybrid, while UAN CPP-S2 x UAN SE3 (36.52 t ha^-1) had ACG (5.718) ≈ ACE (5.457) and it is suggested as base population for selection processes. The crosses UAN SE3 x UAN CPP-S2 (29.52 t ha^-1) with ACG (5.718)> ACE (3.501), could be used as open-pollinated variety, therefore it is recommended for its use in breeding programs.

Keywords : Physalis ixocarpa Brot.; diallel cross; fruit yield; hybrids.