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Cattle (Bos taurus) are large, ... Quantitative trait loci have been found for a range of production and behavioral characteristics for both dairy and beef cattle. [69]
Dairy cattle (also called dairy cows) are cattle bred with the ability to produce large quantities of milk, from which dairy products are made. Dairy cattle generally are of the species Bos taurus . [ 1 ]
Cattle breeds fall into two main types, which are regarded as either two closely related species, or two subspecies of one species. Bos indicus (or Bos taurus indicus ) cattle, commonly called zebu, are adapted to hot climates and originated in the tropical parts of the world such as India, Sub-saharan Africa, China, and Southeast Asia.
Cow and calf. Zebuine (Asian humped) cattle were present in the United States from 1849, when a single bull of Indian origin was imported from the United Kingdom to South Carolina. In 1885 a pair of grey bulls was brought directly from India to Texas; one was large, weighing over 800 kg, the other weighed little more than half that.
General characteristics include cloven hooves and usually at least one of the sexes of a species having true horns. The largest extant bovine is the gaur. In many countries, bovid milk and meat is used as food by humans. Cattle are kept as livestock almost everywhere except in parts of India and Nepal, where they are considered sacred by most ...
Even after the Meiji era when hybrid cattle were encouraged, there were still a considerable number of pure Wagyu cattle remaining in the Taisho era (1912–1926). As a policy for the improvement of Wagyu, efforts were made to eliminate negative characteristics of hybrid cattle as much as possible.
In the mid-twentieth century, intensive selective breeding for dairy characteristics and excessive inbreeding led to a loss of genetic diversity, and also to an increase in transmissible genetic defects such as the recessive factors for bovine progressive degenerative myeloencephalopathy ("weaver disease") and spinal muscular atrophy, both of ...
If it was a cow's first time calving, she will take longer to re-breed by at least 10 days. [4] However, beef cattle can also be bred through artificial insemination, [1] depending on the cow and the size of the herd. Cattle are normally bred during the summer so that calving may occur the following spring. [1]