Utilizing Brahman Germplasm in Crossbreeding Systems
نویسنده
چکیده
Greater than half of the cattle in the world are managed in tropical environments, while approximately 40% of beef cows in the United States are located in subtropical areas. Furthermore, approximately 80% of global beef production is Bos indicus based. Given this, Bos indicus germplasm plays a critical role in both US and worldwide beef production particularly when used as part of a well-structured crossbreeding program.
منابع مشابه
Effective crossbreeding systems utilizing Zebu cattle.
The basic objectives and procedures for successful crossbreeding of beef cattle were considered, with special reference to the levels of realized hybrid vigor that might be anticipated for different crossbreeding programs involving the American Brahman (Z1) and European (Ej) breeds. Intralocus heterozygosis levels with respect to breed origin of genes (breed heterozygosis) were computed for var...
متن کاملGenetic effects for reproductive traits in beef cattle and predicted performance.
Reproductive data were collected on 4,595 cow exposures and subsequent calvings over four generations in a rotational crossbreeding study involving Angus, Brahman, Charolais and Hereford breeds. Direct and maternal additive (Ig and Mg) and nonadditive (Ih and Mh) genetic effects were estimated for calving rate, calf survival, weaning rate, calving assistance and calf birth date. Genetic effects...
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Introduction Taurine (Bos taurus) and zebu (Bos indicus) cattle were domesticated independently in the Near East and in India respectively (Beja-Pereira et al., 2006) and are believed to have diverged 117-275,000 years ago (Bradley et al., 2006). Bos taurus cattle were introduced to Australia by European settlers in the end of the 18th century. The main B. indicus breed used for beef production...
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Mature weight and rate of maturing were estimated in 177 Angus, Brahman, and reciprocal-cross cows grazing bermudagrass or endophyte-infected tall fescue over a 4-yr period to evaluate genotype x environment interactions. Data were collected every 28 d until cows were approximately 18 mo of age and then at prebreeding, postcalving, and weaning of calf. All cows with weight data to at least 42 m...
متن کاملBreed and heterosis effects of American Zebu cattle.
The Brahman (American Zebu) has been evaluated in numerous crossbreeding studies throughout the Southern United States. Brahman females producing straightbred calves have usually been found to have a lower calving percentage, calf survival rate and weaning rate than other contemporary straightbreds, although they have been reported to be superior or competitive in some studies. Birth weights of...
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