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Estimates of environmental effects, genetic parameters and genetic trends for reproductive traits in Alpine goats
Kasap, Ante (Author), Mioč, Boro (Author), Jurković, Darko (Author), Kompan, Drago (Author), Potočnik, Klemen (Author)

URLURL - Presentation file, Visit http://aas.bf.uni-lj.si/zootehnika/supl/3-2012/PDF/3-2012-193-198.pdf New window

Abstract
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.

Language:English
Keywords:goats, Alpine breed, reproductive traits, heriatbility, genetic trends, environmental effects
Work type:Not categorized (r6)
Tipology:1.08 - Published Scientific Conference Contribution
Organization:BF - Biotechnical Faculty
Year:2012
Number of pages:str. 193-198
Numbering:Suppl. 3
UDC:636.39
ISSN on article:1854-4800
COBISS.SI-ID:3112840 Link is opened in a new window
Views:434
Downloads:129
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Record is a part of a proceedings

Title:Livestock production as a technological and social challenge
COBISS.SI-ID:263173888 New window

Record is a part of a journal

Title:Acta agriculturae slovenica
Publisher:Biotehniška fakulteta
ISSN:1854-4800
COBISS.SI-ID:225696256 New window

Secondary language

Language:Unknown
Keywords:koze, pasme, srnasta pasma, reprodukcija, heritabiliteta, genetski trendi, okoljski vplivi

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