VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Fixed effects for 305-day lactation milk traits in cattle = Sistematski vplivi za latnosti mlečnosti v standardni laktaciji pri govedu
    Gorjanc, Gregor, genetik ...
    Fixed part of the model for genetic evaluation of milk (MY), fat (FY), protein yield (PY), as well as fat (FC) and protein content (PC) in dairy cattle was studied. During the period 1975-2000, ... 786551 records of milk and fat from 243634 dairy cows of Black-and-White (B&W), Brown (BR) and Simmental (SI) breed were obtained from 13 077 herds in Slovenia. Dataset for PY and PC covered 479 456 records and 173 069 cows between the years 1990 and 2000. Breeds were analysed separately. Parities higher than seventh were combined in one class. The model for yields included fixed effects of calving season, parity, as well as age at calving within parity and length of lactation as quadratic polynomials. Calving season and linear regression for age at calving were sufficient for FC and PC. Age at calving fitted with quadratic regression within parity showed considerable patterns. Findings from this research will be utilised in adjacent study of random effects in the model for genetic evaluation of milk traits in Slovenia.
    Vir: Prireja mesa in mleka v prihodnosti = Meat and milk production in the future (Str. 301-307)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2001
    Jezik - angleški
    COBISS.SI-ID - 1192072

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