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Physical mapping of repetitive sequences and genome analysis in six Elymus species by in situ hybridization
Dou, Quan-Wen ; Zhang, Tong-Lin ; Tsujimoto, Hisashi
2011-07-01
发表期刊JOURNAL OF SYSTEMATICS AND EVOLUTION ; Dou, QW; Zhang, TL; Tsujimoto, H.Physical mapping of repetitive sequences and genome analysis in six Elymus species by in situ hybridization,JOURNAL OF SYSTEMATICS AND EVOLUTION,2011,49(4):347-352
摘要Genome constitution and genetic relationships between six Elymus species were assessed by physical mapping of different repetitive sequences using a technique of sequential fluorescence in situ hybridization and genomic in situ hybridization. The six Elymus species are all naturally growing species in northwest China, namely, E. sibiricus, E. nutans, E. barystachyus, E. xiningensis, E. excelsus, and E. dahuricus. An StStHH genome constitution was revealed for E. sibiricus and StStHHYY for the remainder species. Each chromosome could be clearly characterized by physical mapping with 18S-26S rDNA, 5S rDNA, Afa-family, and AAG repeats, and be allocated to a certain genome by genomic in situ hybridization. Two 5S rDNA sites, each in the H and St genomes, and three 18S-26S rDNA sites, two in the St genome and one in the Y genome, were uncovered in most of the species. The strong Afa-family hybridization signals discriminated the H genome from the St and Y genomes. The H and Y genome carried more AAG repeats than St. A common non-Robertsonian reciprocal translocation between the H and Y genomes was revealed in E. barystachyus, E. xiningensis, E. excelsus and E. dahuricus. Comparison of molecular karyotypes strongly suggests that they can be classified into three groups, namely, E. sibiricus, E. nutans, and others.; Genome constitution and genetic relationships between six Elymus species were assessed by physical mapping of different repetitive sequences using a technique of sequential fluorescence in situ hybridization and genomic in situ hybridization. The six Elymus species are all naturally growing species in northwest China, namely, E. sibiricus, E. nutans, E. barystachyus, E. xiningensis, E. excelsus, and E. dahuricus. An StStHH genome constitution was revealed for E. sibiricus and StStHHYY for the remainder species. Each chromosome could be clearly characterized by physical mapping with 18S-26S rDNA, 5S rDNA, Afa-family, and AAG repeats, and be allocated to a certain genome by genomic in situ hybridization. Two 5S rDNA sites, each in the H and St genomes, and three 18S-26S rDNA sites, two in the St genome and one in the Y genome, were uncovered in most of the species. The strong Afa-family hybridization signals discriminated the H genome from the St and Y genomes. The H and Y genome carried more AAG repeats than St. A common non-Robertsonian reciprocal translocation between the H and Y genomes was revealed in E. barystachyus, E. xiningensis, E. excelsus and E. dahuricus. Comparison of molecular karyotypes strongly suggests that they can be classified into three groups, namely, E. sibiricus, E. nutans, and others.
文献类型期刊论文
条目标识符http://210.75.249.4/handle/363003/30634
专题中国科学院西北高原生物研究所
推荐引用方式
GB/T 7714
Dou, Quan-Wen,Zhang, Tong-Lin,Tsujimoto, Hisashi. Physical mapping of repetitive sequences and genome analysis in six Elymus species by in situ hybridization[J]. JOURNAL OF SYSTEMATICS AND EVOLUTION, Dou, QW; Zhang, TL; Tsujimoto, H.Physical mapping of repetitive sequences and genome analysis in six Elymus species by in situ hybridization,JOURNAL OF SYSTEMATICS AND EVOLUTION,2011,49(4):347-352,2011.
APA Dou, Quan-Wen,Zhang, Tong-Lin,&Tsujimoto, Hisashi.(2011).Physical mapping of repetitive sequences and genome analysis in six Elymus species by in situ hybridization.JOURNAL OF SYSTEMATICS AND EVOLUTION.
MLA Dou, Quan-Wen,et al."Physical mapping of repetitive sequences and genome analysis in six Elymus species by in situ hybridization".JOURNAL OF SYSTEMATICS AND EVOLUTION (2011).
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