نتایج جستجو برای: cattle breeds
تعداد نتایج: 57202 فیلتر نتایج به سال:
Various cattle populations in the Americas (known as criollo breeds) have an origin in some of the first livestock introduced to the continent early in the colonial period (16th and 17th centuries). These cattle constitute a potentially important genetic reserve as they are well adapted to local environments and show considerable variation in phenotype. To examine the genetic ancestry and diver...
Cattle commonly raised in Thailand have characteristics of Bos indicus (zebu). We do not know when or how cattle domestication in Thailand occurred, and so questions remain regarding their origins and relationships to other breeds. We obtained genome-wide SNP genotypic data of 28 bovine individuals sampled from four regions: North (Kho-Khaolampoon), Northeast (Kho-Isaan), Central (Kho-Lan) and ...
An epidemiological survey of Theileria annulata infection was undertaken in a cattle population in Rajshahi Division, Bangladesh. The local cattle breeds from the area (North Bengal Gray and Deshi) and crosses between the local breeds and Holstein cattle were predominantly screened. In total, 192 cattle serum samples were collected in two areas of Rajshahi Division, the Rajshahi District (n=147...
Proliferation Rates of Bovine Primary Muscle Cells Relate to Liveweight and Carcase Weight in Cattle
Muscling in cattle is largely influenced by genetic background, ultimately affecting beef yield and is of major interest to the beef industry. This investigation aimed to determine whether primary skeletal muscle cells isolated from different breeds of cattle with a varying genetic potential for muscling differ in their myogenic proliferative capacity. Primary skeletal muscle cells were isolate...
Quantitative trait loci (QTL) studies have indicated growth hormone receptor (GHR) as a candidate gene affecting cattle milk yield and composition. In order to characterize genetic variation at GHR in cattle, we studied European and East African breeds with different histories of selection, and Bos grunniens, Ovis aries, Sus scrofa, Bison bison and Rangifer tarandus as references. We sequenced ...
Bovine microsatellite data of 21 loci was used for the assessment of genetic diversity and bottleneck analysis of 10 indigenous grey cattle breeds from different agroclimatic regions of India. A total of 448 alleles were observed across 21 loci and the observed number of alleles varied from 11 (INRA 05) to 35 (ILSTS-05). The overall observed and expected heterozygosity was 0.722 and 0.802, the ...
African bovine trypanosomiasis caused by Trypanosoma sp., is a major constraint on cattle productivity in sub-Saharan Africa. Some African Bos taurus breeds are highly tolerant of infection, but the potentially more productive Bos indicus zebu breeds are much more susceptible. Zebu cattle are well adapted for plowing and haulage, and increasing their tolerance of trypanosomiasis could have a ma...
In the current assessment, an effort was made to examine Indigenous cattle, significant milch, drought-resistant and dual-purpose breeds for genetic advancement, conservation future research. The flat forehead, drooping ears, fatty hump on shoulders, huge dewlap are traits of indigenous cattle. Along with producing A2 milk, they renowned withstanding heat, illness resistance, immunity ticks par...
A panel of cattle bones excavated from the 1000-year-old Viking Fishamble Street site in Dublin was assessed for the presence of surviving mitochondrial DNA (mtDNA). Eleven of these bones gave amplifiable mtDNA and a portion of the hypervariable control region was determined for each specimen. A comparative analysis was performed with control region sequences from five extant Nordic and Irish c...
Information on draught ability on all the major Indian breeds of cattle, buffaloes and pack animals including cross breeds is scanty available, because major research programme has been undertaken on milch animals. Similarly the scenario of cancer incidences in India is not much clear due to lack of systemic study at national level and absence of Animal Cancer Registry. In India, the incidence ...
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