Schätzung von Kreuzungsparametern unter besonderer Berücksichtigung von epistatischen Effekten und einer Optimierung des Kreuzungszuchtverfahrens beim Meerschweinchen in Bolivien

摘要: Estimation of Crossbreeding Parameters with Special Consideration Epistatic Effects and Optimisation Procedures For Guinea Pigs in Bolivia The present study investigates the guinea pig as a native animal for meat production Andean countries Latin America. In framework rural development can contribute to better supply source income especially small holders by improving breeding management. objective this is estimate crossbreeding parameters, focusing on epistatic effects, from crossings between framed synthetic line consisting 29 Bolivian strains an imported Peru selected body weight, kept under semi-intensive/semi-extensive „modern“ management conditions. Conclusions optimisation systems should also be derivated.. introduction first special biological charcteristics well cultural symbolic meaning pig, systems, are briefly described. literature part treats gene effects crossbreeding, non-additive planning optimization systems. Also review reproduction performance pureand presented. study, data 2857 second litters 7745 progenies, stemming matings 391 bucks 1688 dams were analysed. animals belong line, developed at Universidad Mayor de San Simon, Cochabamba, Bolivia, Peruvian 12 groups derived these stocks: reciprocal F1s, backcrosses, F2, pre-rotational 50% proportion each purebred line. basic model estimation parameters Jakubec three different kinds (additive x additive interactions, dominance interactions) Dickerson recombination loss effect individual (progeny), maternal (individual), paternal (male mating partner) grandmaternal (maternal) level. Because intercorrelation (multicolinearity) most relevant practical methods strategies number per genetic was restricted five one effect, respectively: Dickerson-Modell: gi, hi, ri, gm, hm gpr, hpr, rpr, hi; Jakubec-Modell aa: di, aai, dm dpr, aapr, di; JakubecModell dd: ddi, ddpr, di (i: individual, m: maternal, pr: progeny). considered reference. GLSand LS-breeding group means estimated weight growth traits, traits productivity traits. prevailing differences positive signs negative progeny dam metabolic half year production. models results discussed global context recommendations selection investigated lines specific seasonal economical conditions Bolivia.