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Plant Diversity 2017, 39(03) 117-122 DOI:   http://dx.doi.org/10.1016/j.pld.2017.05.003  ISSN: 2096-2703 CN: 53-1233

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Keywords
Elymus nutans
Karyotype variation
Inter-genomic translocation
Authors
PubMed

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

Quanwen Dou a, *, Feng Yu a, b, Yuan Li a, b, Yanyan Zhao a, b, Ruijuan Liu a, b

a Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Plateau Institute of Biology, Chinese Academy of Sciences, Xining, 810001, China
b Graduate University of Chinese Academy of Sciences, Beijing, 100049, China

Abstract

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.

Keywords Elymus nutans   Karyotype variation   Inter-genomic translocation  
Received 2016-08-29 Revised  Online: 2017-05-13 
DOI: http://dx.doi.org/10.1016/j.pld.2017.05.003
Fund:the National Natural Science Foundation of Qinghai Province (2015-ZJ-903) and the National Natural Science Foundation of China (31072075)
Corresponding Authors:
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