Localization of 5,105 Hanwoo (Korean Cattle) BAC Clones on Bovine Chromosomes by the Analysis of BAC End Sequences (BESs) Involving 21,024 Clones

Choi, Jae Min;Chae, Sung-Hwa;Kang, Se Won;Choi, Dong-Sik;Lee, Yong Seok;Park, Hong-Seog;Yeo, Jung-Sou;Choi, Inho

  • 투고 : 2006.11.19
  • 심사 : 2007.04.07
  • 발행 : 2007.11.01


As an initial step toward a better understanding of the genome structure of Korean cattle (Hanwoo breed) and initiation of the framework for genomic research in this bovine, the bacterial artificial chromosome (BAC) end sequencing of 21,024 clones was recently completed. Among these clones, BAC End Sequences (BESs) of 20,158 clones with high quality sequences (Phred score ${\geq}20$, average BES equaled 620 bp and totaled 23,585,814 bp), after editing sequencing results by eliminating vector sequences, were used initially to compare sequence homology with the known bovine chromosomal DNA sequence by using BLASTN analysis. Blast analysis of the BESs against the NCBI Genome database for Bos taurus (Build 2.1) indicated that the BESs from 13,201 clones matched bovine contig sequences with significant blast hits (E<$e^{-40}$), including 7,075 single-end hits and 6,126 paired-end hits. Finally, a total of 5,105 clones of the Korean cattle BAC clones with paired-end hits, including 4,053 clones from the primary analysis and 1,052 clones from the secondary analysis, were mapped to the bovine chromosome with very high accuracy.


Korean Cattle (Hanwoo);BAC End Sequence (BES);Chromosomal Map


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