title: Comparative mapping for bighead carp (Aristichthys nobilis) against model and non-model fishes provides insights into the genomic evolution of cyprinids.
abstract: Comparative mapping provides an efficient method to connect genomes of non-model and model fishes. In this study, we used flanking sequences of the 659 microsatellites on a genetic map of bighead carp (Aristichthys nobilis) to comprehensively study syntenic relationships between bighead carp and nine model and non-model fishes. Of the five model and two food fishes with whole genome data, Cyprinus carpio showed the highest rate of positive BLAST hits (95.3 %) with bighead carp map, followed by Danio rerio (70.9 %), Oreochromis niloticus (21.7 %), Tetraodon nigroviridis (6.4 %), Gasterosteus aculeatus (5.2 %), Oryzias latipes (4.7 %) and Fugu rubripes (3.5 %). Chromosomal syntenic analyses showed that inversion was the basic chromosomal rearrangement during genomic evolution of cyprinids, and the extent of inversions and translocations was found to be positively correlated with evolutionary relationships among fishes studied. Among the five investigated cyprinids, linkage groups (LGs) of bighead carp, Hypophthalmichthys molitrix and Ctenopharyngodon idella exhibited a one-to-one relationship. Besides, LG 9 of bighead carp and homologous LGs of silver carp and grass carp all corresponded to the chromosomes 10 and 22 of zebrafish, suggesting that chromosomal fission may have occurred in the ancestor of zebrafish. On the other hand, LGs of bighead carp and common carp showed an approximate one-to-two relationship with extensive translocations, confirming the occurrence of a 4th whole genome duplication in common carp. This study provides insights into the understanding of genome evolution among cyprinids and would aid in transferring positional and functional information of genes from model fish like zebrafish to non-model fish like bighead carp.
authors: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China, zhuchuankun@hytc.edu.cn.
authors: Chuankun
authors: C
authors: Zhu
authors: Jingou
authors: J
authors: Tong
authors: Xiaomu
authors: X
authors: Yu
authors: Wenjie
authors: W
authors: Guo
mesh_terms: D000818:Animals; D002347:Carps / Q000235:genetics; D007446:Chromosome Inversion; D002874:Chromosome Mapping / Q000379:methods*; D002875:Chromosomes / Q000235:genetics; D023681:Cichlids / Q000235:genetics; D003530:Cyprinidae / Q000145:classification / Q000235:genetics*; D019143:Evolution, Molecular; D005399:Fishes / Q000145:classification / Q000235:genetics*; D020440:Gene Duplication; D008040:Genetic Linkage; D016678:Genome / Q000235:genetics*; D018895:Microsatellite Repeats / Q000235:genetics; D009990:Oryzias / Q000235:genetics; D010802:Phylogeny; D026801:Synteny; D023741:Takifugu / Q000235:genetics; D014178:Translocation, Genetic; D015027:Zebrafish / Q000235:genetics
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