Abstract:
:We studied the genomic organization of Hox genes in Atlantic salmon (Salmo salar) and made comparisons to that in rainbow trout (Oncorhynchus mykiss), another member of the family Salmonidae. We used these two species to test the hypothesis that the Hox genes would provide evidence for a fourth round of duplication (4R) of this gene family given the recent polyploid ancestry of the salmonid fish. Thirteen putative Hox clusters were identified and 10 of these complexes were localized to the current Atlantic salmon genetic map. Syntenic regions with the rainbow trout linkage map were detected and further homologies and homeologies are suggested. We propose that the common ancestor of Atlantic salmon and rainbow trout possessed at least 14 clusters of Hox genes, and additional clusters cannot be ruled out. Salmonid Hox cluster complements seem to be more similar to those of zebrafish (Danio rerio) than medaka (Oryzias latipes) or pufferfish (Sphoeroides nephelus and Takifugu rubripes), as both Atlantic salmon and rainbow trout have retained HoxCb ortholog, which has been lost in medaka and pufferfish but not in zebrafish. However, our data suggest that phylogenetically, the homologous genes within each cluster express mosaic relationships among the teleosts tested and, thus, leave unresolved the interfamilial relationships among these taxa.
journal_name
J Mol Evoljournal_title
Journal of molecular evolutionauthors
Moghadam HK,Ferguson MM,Danzmann RGdoi
10.1007/s00239-004-0338-7keywords:
subject
Has Abstractpub_date
2005-11-01 00:00:00pages
636-49issue
5eissn
0022-2844issn
1432-1432journal_volume
61pub_type
杂志文章abstract::The best reconstructions of the history of life will use both molecular time estimates and fossil data. Errors in molecular rate estimation typically are unaccounted for and no attempts have been made to quantify this uncertainty comprehensively. Here, focus is primarily on fossil calibration error because this error ...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
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journal_title:Journal of molecular evolution
pub_type: 杂志文章
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journal_title:Journal of molecular evolution
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journal_title:Journal of molecular evolution
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journal_title:Journal of molecular evolution
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更新日期:1994-10-01 00:00:00
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journal_title:Journal of molecular evolution
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journal_title:Journal of molecular evolution
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journal_title:Journal of molecular evolution
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journal_title:Journal of molecular evolution
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