construction of red fox chromosomal fragments from the short-read genome assembly
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ID: 163191
2018
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Abstract
The genome of a red fox (Vulpes vulpes) was recently sequenced and assembled using next-generation sequencing (NGS). The assembly is of high quality, with 94X coverage and a scaffold N50 of 11.8 Mbp, but is split into 676,878 scaffolds, some of which are likely to contain assembly errors. Fragmentation and misassembly hinder accurate gene prediction and downstream analysis such as the identification of loci under selection. Therefore, assembly of the genome into chromosome-scale fragments was an important step towards developing this genomic model. Scaffolds from the assembly were aligned to the dog reference genome and compared to the alignment of an outgroup genome (cat) against the dog to identify syntenic sequences among species. The program Reference-Assisted Chromosome Assembly (RACA) then integrated the comparative alignment with the mapping of the raw sequencing reads generated during assembly against the fox scaffolds. The 128 sequence fragments RACA assembled were compared to the fox meiotic linkage map to guide the construction of 40 chromosomal fragments. This computational approach to assembly was facilitated by prior research in comparative mammalian genomics, and the continued improvement of the red fox genome can in turn offer insight into canid and carnivore chromosome evolution. This assembly is also necessary for advancing genetic research in foxes and other canids.
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rando2018genesconstruction
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| Authors | ;Halie M. Rando;Marta Farré;Michael P. Robson;Naomi B. Won;Jennifer L. Johnson;Ronak Buch;Estelle R. Bastounes;Xueyan Xiang;Shaohong Feng;Shiping Liu;Zijun Xiong;Jaebum Kim;Guojie Zhang;Lyudmila N. Trut;Denis M. Larkin;Anna V. Kukekova |
| Journal | thermal science and engineering progress |
| Year | 2018 |
| DOI |
10.3390/genes9060308
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| URL | |
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