Breed comparisons for growth traits adjusted for within-breed genetic trend using expected progeny differences
نویسندگان
چکیده
منابع مشابه
Breed comparisons for growth traits adjusted for within-breed genetic trend using expected progeny differences.
Records (2,910) of birth (BWT), weaning (WW), and yearling weight (YW) of F1 calves produced in a top-cross experiment involving Angus, Hereford, Pooled Hereford, Charolais, Limousin, Simmental, Gelbvieh, Maine-Anjou, Chianina, Tarentaise, Shorthorn, and Salers bulls mated to Hereford and Angus cows and records (4,592) of WW on three-breed-cross calves out of 986 F1 females of the same breed cr...
متن کاملComparison of sire breed solutions for growth traits adjusted by mean expected progeny differences to a 1993 base.
Records on growth traits were obtained from five Midwestern agricultural experiment stations as part of a beef cattle crossbreeding project (NC-196). Records on birth weight (BWT, n =3,490), weaning weight (WWT, n = 3,237), and yearling weight (YWT, n = 1,372) were analyzed within locations and pooled across locations to obtain estimates of breed of sire differences. Solutions for breed of sire...
متن کاملAcross-breed adjustment factors for expected progeny differences for carcass traits.
Adjustment factors to allow comparison of EPD from several breed associations for birth, weaning, and yearling weights have been available for more than 10 yr. This paper describes steps to calculate adjustment factors for EPD for 4 carcass traits: marbling score, fat thickness, ribeye area, and retail product percentage. The required information is the same as for the weight traits: 1) breed o...
متن کاملGenetic Analysis of Type Traits for the Italian Jersey Breed
Anafi (Associazione Nazionale Allevatori Frisona Italiana) is also in charge of the Italian Jersey cattle genetic evaluations. Since interest about this dairy breed is steadily mounting, (co)variance components for 16 type traits of Italian Jersey cows were estimated, in order to start thinking of how to develop a new and more comprehensive selection index. The canonical transformation, in the ...
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ژورنال
عنوان ژورنال: Journal of Animal Science
سال: 1993
ISSN: 0021-8812,1525-3163
DOI: 10.2527/1993.7161419x