68 REPRODUCTIVE PERFORMANCE OF CLONED BULLS
نویسندگان
چکیده
منابع مشابه
Determining Reproductive Fertility in Herd Bulls
ity of a beef operation is the percentage of the calf crop weaned, which, in turn, is determined mainly by the number of cows bred during the breeding season. The herd bull influences overall herd fertility more than any other single animal. Because the bull also supplies half of the genetics to all of the calves he sires, bull selection can be the most powerful method of genetic improvement in...
متن کاملEffect of Energy Intake on Reproductive Performance of Senepol and Angus Bulls in Florida
To determine the effect of energy intake on semen characteristics and libido, pubertal Angus (n = 10) and Senepol (n = 10) bulls (approximately 16 months of age and 816 lb) were stratified by age and weight between two treatments. Treatments were diets that provided 75% (LOW) or 150% (HIGH) of maintenance metabolizable energy requirements. Diets were group fed for 112 days (June through Septemb...
متن کاملReproductive effects of feeding gossypol and vitamin E to bulls.
An experiment was conducted to determine the effects of long-term feeding of cottonseed meal on the reproductive traits of Holstein bulls. Holstein bulls approximately 6 mo of age were placed on the following treatments: 1) soybean meal + corn (CON); 2) cottonseed meal + corn (GOS); and 3) cottonseed meal + 4,000 IU vitamin E x bull(-1) x d(-1) (G+4E). The GOS and G+4E diets were formulated to ...
متن کاملThe Reproductive and Nutritional Management of Beef Bulls
pregnancy rate is one of the most important factors determining profit or loss. Considerable emphasis and focus is placed on the nutritional and reproductive management of the cow herd; but, unfortunately, in most operations little emphasis is placed on the bull. However, each bull is expected to impregnate from 15 40 females during the breeding season in a typical cow-calf operation and, thus,...
متن کاملGenetic Study of Dairy Cattle and Buffalo Bulls Based on Growth, Milk Production and Reproductive Traits
The present investigation aimed to conduct a genetic study of dairy cattle and buffalo bulls based on economic traits and their phenotypic correlation. The means of various economic traits in both the species are presented. Cattle bulls reported a better libido score, Flehmen response, requirement of mounting stimulus and semen volume, conception rate and expected predicted difference for milk ...
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ژورنال
عنوان ژورنال: Reproduction, Fertility and Development
سال: 2005
ISSN: 1031-3613
DOI: 10.1071/rdv17n2ab68