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Originally published as Genetics Published Articles Ahead of Print on March 17, 2006.
Genetics, Vol. 173, 1319-1328, July 2006, Copyright © 2006
doi:10.1534/genetics.106.055541
A Second-Generation Integrated Map of the Silkworm Reveals Synteny and Conserved Gene Order Between Lepidopteran Insects
Yuji Yasukochi*,1,
Laksmikutty A. Ashakumary*,
Kotaro Baba*,
Atsuo Yoshido
and
Ken Sahara
* Insect Genome Laboratory, National Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8634, Japan and Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University, Sapporo, Hokkaido 060-8589, Japan
1 Corresponding author: National Institute of Agrobiological Science, Owashi 1-2, Tsukuba, Ibaraki 305-8634, Japan.
E-mail: yaskoch{at}affrc.go.jp
A second-generation linkage map was constructed for the silkworm, Bombyx mori, focusing on mapping Bombyx sequences appearing in public nucleotide databases and bacterial artificial chromosome (BAC) contigs. A total of 874 BAC contigs containing 5067 clones (22% of the library) were constructed by PCR-based screening with sequence-tagged sites (STSs) derived from whole-genome shotgun (WGS) sequences. A total of 523 BAC contigs, including 342 independent genes registered in public databases and 85 expressed sequence tags (ESTs), were placed onto the linkage map. We found significant synteny and conserved gene order between B. mori and a nymphalid butterfly, Heliconius melpomene, in four linkage groups (LGs), strongly suggesting that using B. mori as a reference for comparative genomics in Lepidotera is highly feasible.
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