Relationship Between United States and Canadian Genetic Evaluations of Longevity and Somatic Cell Score

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منابع مشابه

Relationship between United States and Canadian genetic evaluations of longevity and somatic cell score.

Canadian and US evaluations of Holstein bulls were compared for longevity measures (433 bulls) and somatic cell score (354 bulls). Bulls were required to have a birth year of > or = 1975, daughter information from > or = 20 herds, and a reliability of > or = 50% in both Canada and the US. The number of bulls with longevity evaluations was greater for early years because longevity information wa...

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Relationships between evaluations of Canadian and USA Holstein bulls for longevity and somatic cell score

Canadian and United States evaluations of Holstein bulls were compared for longevity and somatic cell score. A total of 13 236 bulls was evaluated for longevity with 462 bulls having evaluations in both countries, and 10 945 bulls evaluated for somatic cell score with 564 bulls having evaluations in both countries. Multiple across country evaluation procedures were used to estimate the genetic ...

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ژورنال

عنوان ژورنال: Journal of Dairy Science

سال: 1997

ISSN: 0022-0302

DOI: 10.3168/jds.s0022-0302(97)76115-0