Abstract:
:Many lepidopteran insects exhibit body colour variations, where the high phenotypic diversity observed in the wings and bodies of adults provides opportunities for studying adaptive morphological evolution. In the silkworm Bombyx mori, two genes responsible for moth colour mutation, Bm and Ws, have been mapped to 0.0 and 14.7 cM of the B. mori genetic linkage group 17; however, these genes have not been identified at the molecular level. We performed positional cloning of both genes to elucidate the molecular mechanisms that underlie the moth wing- and body-colour patterns in B. mori. We successfully narrowed down Bm and Ws to ~2-Mb-long and 100-kb-long regions on the same scaffold Bm_scaf33. Gene prediction analysis of this region identified 77 candidate genes in the Bm region, whereas there were no candidate genes in the Ws region. Fluorescence in-situ hybridisation analysis in Bm mutant detected chromosome inversion, which explains why there are no recombination in the corresponding region. The comparative genomic analysis demonstrated that the candidate regions of both genes shared synteny with a region associated with wing- and body-colour variations in other lepidopteran species including Biston betularia and Heliconius butterflies. These results suggest that the genes responsible for wing and body colour in B. mori may be associated with similar genes in other Lepidoptera.
journal_name
Heredity (Edinb)journal_title
Heredityauthors
Ito K,Katsuma S,Kuwazaki S,Jouraku A,Fujimoto T,Sahara K,Yasukochi Y,Yamamoto K,Tabunoki H,Yokoyama T,Kadono-Okuda K,Shimada Tdoi
10.1038/hdy.2015.69subject
Has Abstractpub_date
2016-01-01 00:00:00pages
52-9issue
1eissn
0018-067Xissn
1365-2540pii
hdy201569journal_volume
116pub_type
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