Naslov
Estimation of genetic parameters for longevity in Slovenian dairy cattle

Autori
Potočnik, Klemen ; Jovanovac, Sonja ; Krsnik, Jurij ; Gantner, Vesna ; Štepec, Miran ; Raguž, Nikola ; Gorjanc, Gregor ; Logar, Betka

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Zbornik radova s 44. hrvatskog i 4. međunarodnog simpozija agronoma / Marić, Sonja ; Lončarić, Zdenko - Osijek : Poljoprivredni fakultet Sveučilišta Josipa Jurja Strossmayera u Osijeku, 2009, 757-761

ISBN
978-953-6331-67-3

Skup
44. hrvatski i 4. međunarodni simpozij agronoma

Mjesto i datum
Opatija, Hrvatska, 16.02.2009. - 20.02.2009

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
longevity ; genetic parameters ; proportional hazards model ; dairy cattle

Sažetak
Genetic parameters for longevity in Slovenian Holstein (H), Simmental (S) and Brown Swiss (B) cattle were estimated with sire_mgs (maternal grandsire) model using survival analysis, applaing a proportional hazard function following a Weibull distribution. Longevity was described as length of productiove life (LPL), that is as number of days from first calving to the culling or to the moment of data collection (cmpleted - uncensored and censored records) Truncation date was January 1, 1991 while August 1, 2008 was date of data collection. Estimated sire variances were 0.050 (H), 0.021 (S) and 0.034 (B). Herd variances were 0.191 (H), 0.299 (S) and 0.318 (B). Heritabilities estimates were 0.161 (H), 0.064 (S) and 0.101 (B).

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

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