Genetic parameters of reproductive traits in Tunisian Holsteins
نویسندگان
چکیده
منابع مشابه
Genetic parameters of reproductive traits in sheep
Reproductive traits from 7642 ewes were recorded from 1975 to 1983. The ewes were of five breeds (Dorset (D), Finnsheep (F), Rambouillet (R), Suffolk (S) and Targhee (T)) and two composite lines [C1 (1=2F þ 1=4R þ 1=4D) and C2 (1=2F þ 1=4S þ 1=4T)]. Genetic parameters were estimated for six basic and seven composite traits. The basic traits were conception rate (CR), total number of lamb born (...
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Heritabilities and genetic correlations were estimated for milk and fat yields and fat percentage from 305-d, matureequivalent records of registered and grade Holsteins in California, New York, and Wisconsin. Parameter estimates were olytained with daughter on dam regression within herd-year-season and sire of daughter. Data were pairs of first lactation records (38,115 in California, 171,555 i...
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ژورنال
عنوان ژورنال: Archives Animal Breeding
سال: 2016
ISSN: 2363-9822
DOI: 10.5194/aab-59-209-2016