Estimates of environmental effects, genetic parameters and genetic trends for reproductive traits in Alpine goats

Ante Kasap (Avtor), Boro Mioč (Avtor), Darko Jurković (Avtor), Drago Kompan (Avtor), Klemen Potočnik (Avtor)

Povzetek

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.

Ključne besede

goats;Alpine breed;reproductive traits;heriatbility;genetic trends;environmental effects;

Podatki

Jezik:	Angleški jezik
Leto izida:	2012
Tipologija:	1.08 - Objavljeni znanstveni prispevek na konferenci
Organizacija:	UL BF - Biotehniška fakulteta
Založnik:	Biotehniška fakulteta
UDK:	636.39
COBISS:	3112840
ISSN:	1854-4800
Št. ogledov:	912
Št. prenosov:	239
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Neznan jezik
Sekundarne ključne besede:	koze;pasme;srnasta pasma;reprodukcija;heritabiliteta;genetski trendi;okoljski vplivi;
URN:	URN:NBN:SI
Vrsta dela (COBISS):	Delo ni kategorizirano
Strani:	str. 193-198
Zvezek:	ǂSuppl. ǂ3
Čas izdaje:	2012
Ključne besede (UDK):	applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;agriculture and related sciences and techniques;forestry;farming;wildlife exploitation;kmetijstvo ter sorodne vede in tehnologije;animal husbandry and breeding in general;livestock rearing;breeding of domestic animals;živinoreja na splošno;vzreja domačih živali;small ruminants;mali prežvekovalci;drobnica;ovce;koze;
ID:	21740