Abstract
164 Single nucleotide variants and indels identified from whole-genome resequencing of Gyr, Girolando, and Holstein cattle breeds
Highlights
Brazil has the world’s largest commercial cattle herd with around 215.2 million head in 2015 according to the agricultural census [1], from which about 80% is estimated to be composed of purebred and crossbreed Bos primigenius indicus animals
We presented an extensive genome analysis of Gyr, Girolando, Guzerat and Holstein breeds following whole-genome re-sequencing using an Illumina HiSeq 2000 sequencing platform, which lead to identification of 27,441,279 single nucleotide variations (SNVs) and 3,828,041InDels in the cattle genome
The high number of genetic variants identified for each breed is important to monitoring genetic diversity and for developing strategies to prevent an eventual loss of genetic variability
Summary
Brazil has the world’s largest commercial cattle herd with around 215.2 million head in 2015 according to the agricultural census [1], from which about 80% is estimated to be composed of purebred and crossbreed Bos primigenius indicus animals. Guzerat and Gyr, which were introduced from India, are important indicine cattle breeds for milk and meat production in Brazil. The Guzerat breed is recognized for traits such as resistance to parasites, heat tolerance and willingness to consume forage with low nutritional value, all of which are important to its adaptation to adverse tropical environments. This breed was included in the FAO list of domestic animal genetic resources to be conserved by management [4] due to their potential for production in the tropics and their small effective population size
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