Estimates of genetic parameters in Mimosa scabrella populations by random and mixed reproduction models

G.R. Sobierajski, P.Y. Kageyama, A.M. Sebbenn
2006 Crop Breeding and Applied Biotechnology  
47 Estimates of genetic parameters in Mimosa scabrella populations by random and mixed reproduction models Crop Breeding and Applied Biotechnology 6:47-54, 2006 Brazilian Society of Plant Breeding. Printed in Brazil Estimates of genetic parameters in Mimosa scabrella populations by random and mixed reproduction models ABSTRACT -Heritabilities and expected selection gains were estimated in nine provenances of Mimosa scabrella Bentham by means of random and mixed reproduction models. In the
more » ... odels. In the random model, the relationship coefficient was considered as half-sibs, and in the mixed, relatedness was estimated based on parameters of the mating system. The trait height was measured six months after planting in the field and a progeny sample of each provenance was analyzed by isoenzyme electrophoresis to estimate parameters of the mating system. The mean inbreeding coefficient was 0.392, which is 56.8% higher than expected in half-sib progenies (0.25). The mean estimates of the additive genetic variance, heritability within progenies and gains expected with selection among and within progenies, calculated by the underlying random reproduction model were overestimated, respectively, by 36%, 48% and 41%, when compared to estimates obtained based on the mixed reproduction model.
doi:10.12702/1984-7033.v06n01a07 fatcat:chiug2xagnd55cx3nuf2luaeh4