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 

作者机构：Laboratory of Adaptation and Evolution of Plateau BiotaNorthwest Plateau Institute of BiologyChinese Academy of Sciences Xining 810001 China Graduate University of Chinese Academy of Sciences Beijing 100049 China 

出 版 物：《Plant Diversity》 (植物多样性（英文版）)

年 卷 期：2017年第39卷第3期

页      面：117-122页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 0901[农学-作物学] 0902[农学-园艺学] 0713[理学-生态学] 

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

主　　题：Elymus nutans Karyotype variation Inter-genomic translocation 

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.