VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Estimates of environmental effects, genetic parameters and genetic trends for reproductive traits in Alpine goats
    Kasap, Ante ...
    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.
    Vir: Livestock production as a technological and social challenge (Suppl. 3, 2012, str. 193-198)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2012
    Jezik - angleški
    COBISS.SI-ID - 3112840

    Povezava(-e):

    http://aas.bf.uni-lj.si/zootehnika/supl/3-2012/PDF/3-2012-193-198.pdf
    Repozitorij Univerze v Ljubljani – RUL
    Digitalna knjižnica Slovenije - dLib.si

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