20.500.12556/RUL-445 Estimates of environmental effects, genetic parameters and genetic trends for reproductive traits in Alpine goats Study of litter size (LS), birth weight (BW) and litter weight (LW) over successive parities was conducted on dairy Alpine goats reared in Croatia. Statistical analysis was performed on records obtained out of 46 722 parturitions from 18 546 goats of different ages and parities. Twining and tripling rates were 27% i.e. 1%. Unadjusted averages for LS, BW and LW were 1.46 lambs, 3.29 kg, and 4.75 kg, respectively. Univariate analysis (repeatability animal model) was used in estimation of variance components and prediction of breeding values. Season (as year-month interaction), age at lambing (as quadratic regression) nested within parity and type of birth were treated as fixed, and herd-year, additive genetic, permanent environmental and residual were treated as random effects, respectively. All investigated effects were statistically significant (P < 0.001). Heritability estimates were 0.039, 0.036, and 0.023 for LS, BW, and LW, respectively. Herd-year affected BW (46%) and LW (40%) much more than LS (12%). Average breeding values by year of the birth in the last decade oscillated between investigated years. Positive genetic trends of all investigated traits were determined only after year 2007. goats Alpine breed reproductive traits heriatbility genetic trends environmental effects koze pasme srnasta pasma reprodukcija heritabiliteta genetski trendi okoljski vplivi true false false Angleški jezik Neznan jezik Delo ni kategorizirano 2014-07-11 12:25:38 2014-07-11 12:25:38 2022-04-14 03:45:06 0000-00-00 00:00:00 2012 0 0 Str. 193-198 Suppl. 3 2012 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 636.39 1854-4800 3112840 263173888 http://aas.bf.uni-lj.si/zootehnika/supl/3-2012/PDF/3-2012-193-198.pdf 1 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=445 Biotehniška fakulteta Acta agriculturae slovenica. Suplement 0 0 0