Marija Špehar (Avtor), Zdenko Ivkić (Avtor), Vesna Gantner (Avtor), Zdravko Barać (Avtor), Marija Klopčič (Avtor), Marko Čepon (Avtor), Jurij Krsnik (Avtor), Miran Štepec (Avtor), Gregor Gorjanc (Avtor), Klemen Potočnik (Avtor)

Povzetek

The objective of this study was to estimate genetic parameters for milk traits (daily milk, fat, and protein yield) for a joint genetic evaluation in Holstein breed in Croatia and Slovenia and to compare results from the joint and national evaluation systems. Test-day records from Croatian (CRO) and Slovenian (SVN) routine genetic evaluation in May 2012 were used. A joint data set included 1,840,816 CRO and 2,680,001 SVN test-day records of 111,218 CRO and 127,774 SVN cows. The total number of animals included in the joint pedigree was 382,991. Genetic parameters for milk traits were estimated using bivariate model. SVN data were evaluated with a model which included fixed effects of calving season and stage of lactation fitted by the Ali-Schaeffer's lactation curve nested within parity. Random part of the model consisted of a common herd environment, direct additive genetic, and permanent environment effect within lactation. In addition to these, fixed class effect of region and covariate age at the first calving were included in the model for CRO data. In the random part, the contemporary group was defined as an interaction between the herd and year of testing for CRO data and as herd effect in SVN data. The estimated heritabilities of daily milk, fat, and protein yield were 0.19, 0.15, and 0.17 for CRO and 0.23, 0.19, and 0.21 for SVN data. Genetic correlation between countries was medium to high (0.78, 0.64, and 0.63) indicating some differences between countries. Correlations between inferred breeding values from the joint and national evaluations were high (0.997 for CRO and 0.999 for SVN evaluation). On SVN scale, genetic trend obtained from the joint evaluation was higher compared to the national evaluation. On CRO scale, the national genetic trend for daily protein yield was similar to the trend from joint model.

Ključne besede

cattle;Holstein;milk traits;heritability;correlations;genetic trends;Slovenia;Croatia;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.08 - Objavljeni znanstveni prispevek na konferenci
Organizacija: UL BF - Biotehniška fakulteta
Založnik: Biotehniška fakulteta
UDK: 636.2
COBISS: 3111048 Povezava se bo odprla v novem oknu
ISSN: 1854-4800
Št. ogledov: 1582
Št. prenosov: 420
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Neznan jezik
Sekundarne ključne besede: govedo;pasme;holštajn;lastnosti mlečnosti;heritabiliteta;korelacije;genetski trendi;Slovenija;Hrvaška;
URN: URN:NBN:SI
Vrsta dela (COBISS): Delo ni kategorizirano
Strani: str. 149-154
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;large ruminants;cattle;oxen;veliki prežvekovalci;govedo;voli;
ID: 21728