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2 results for “domesticated caprines”
The assembly of caprine Y chromosome sequence reveals a unique paternal phylogenetic pattern and improves our understanding the origin of domestic goat
<p>The mammalian Y chromosome offers a unique perspective on the male reproduction and paternal evolutionary histories. However, further understanding of the Y chromosome biology for most mammals is hindered by the lack of a Y chromosome assembly. This study presents an integrated <i>in silico</i> strategy for identifying and assembling the goat Y-linked scaffolds <span>using existing data</span>. A total of 11.5 Mb Y-linked sequences were clustered into 33 scaffolds, and 187 protein-coding genes were annotated. We also identified high abundance of repetitive elements. A 5.84 Mb subset was further ordered into an assembly with the evidence from the goat Radiation-Hybrid map (RH map). The existing whole-genome re-sequencing data of 96 goats (worldwide distribution) were utilized to exploit the paternal relationships among bezoars and domestic goats. Goat paternal lineages were clearly divided into two clades (Y1 and Y2), predating the goat domestication. Demographic history analyses indicated that maternal lineages experienced a bottleneck effect around 2,000 YBP (years before present), after which goats belonging to the A haplogroup spread worldwide from the Near East. As opposed to this, paternal lineages experienced a population decline around the 10,000 YBP. The evidence from the Y chromosome suggests that male goats were not affected by the A haplogroup worldwide transmission, which implies sexually unbalanced contribution to the goat trade and population expansion in post-Neolithic period.</p>
The assembly of caprine Y chromosome sequence reveals a unique paternal phylogenetic pattern and improves our understanding the origin of domestic goat
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