Evaluation of purebreds and two-breed crosses in swine: reproductive performance.
نویسندگان
چکیده
منابع مشابه
Reproductive Efficiency of Purebred and Crossbred Dairy Cattle
Nine measures related to breeding efficiency were used for comparisons among purebred Ayrshires, Brown Swiss, Holsteins, and Jerseys and between purebreds and 32 crossbred groups representing 2-breed, 3-breed, 5/8, and backcrosses by purebred sires and progeny of crossbred sires. There were four herds wi th Holsteins common to all, Brown Swiss and Jerseys in three herds and Ayrshires in one her...
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عنوان ژورنال:
- Journal of animal science
دوره 37 6 شماره
صفحات -
تاریخ انتشار 1973