High molecular karyotype variation revealed in indigenous Elymus nutans in the Qinghai Plateau  

作　　者：Quanwen Dou Feng Yu Yuan Li Yanyan Zhao Ruijuan Liu 

机构地区：[1]Laboratory of Adaptation and Evolution of Plateau Biota,Northwest Plateau Institute of Biology,Chinese Academy of Sciences, Xining, 810001, China [2]Graduate University of Chinese Academy of Sciences, Beijing, 100049, China

出　　处：《Plant Diversity》2017年第3期117-122,共6页植物多样性（英文版）

基　　金：supported by the National Natural Science Foundation of Qinghai Province (2015-ZJ-903);the National Natural Science Foundation of China (31072075)

摘　　要：The karyotypes of 27 individuals of Elymus nutans from eight wild populations in the Qinghai Plateau were analyzed using sequential FISH and GISH. High FISH pattern polymorphism and karyotype variation were detected within and among populations. The chromosome variations were mainly characterized as repeat deletions and amplifications along with inter-genomic translocations. The chromosomes of the St and Y genomes demonstrated higher polymorphism than those of the H genome. Six different intergenomic translocations were identified in 33.3% of individuals; type Ⅰ and Ⅱ translocations were detected with higher frequency. Further analysis revealed that type Ⅰ and Ⅱ translocations were distributed in different geographic regions. The origin of high karyotype variation of E. nutans in the Qinghai plateau is further discussed.The karyotypes of 27 individuals of Elymus nutans from eight wild populations in the Qinghai Plateau were analyzed using sequential FISH and GISH. High FISH pattern polymorphism and karyotype variation were detected within and among populations. The chromosome variations were mainly characterized as repeat deletions and amplifications along with inter-genomic translocations. The chromosomes of the St and Y genomes demonstrated higher polymorphism than those of the H genome. Six different inter- genomic translocations were identified in 33.3% of individuals; type I and II translocations were detec- ted with higher frequency. Further analysis revealed that type I and II translocations were distributed in different geographic regions. The origin of high karyotype variation of E. nutans in the Qinghai plateau is further discussed.

关 键 词：Elymus nutans Karyotype variation Inter-genomic translocation 

分 类 号：Q948[生物学—植物学]