Karyotype mosaicism in early generation synthetic hexaploid wheats

文献类型： 外文期刊

第一作者： Luo, Jiangtao

作者： Luo, Jiangtao;Zheng, Jianmin;Pu, Zongjun;Luo, Jiangtao;Zheng, Jianmin;Pu, Zongjun;Zhao, Laibin;Li, Yazhou;Zhang, Lianquan;Liu, Dengcai;Hao, Ming;Zhao, Laibin;Liu, Dengcai;Hao, Ming

作者机构：

关键词： chromosomal variation; genome instability; somatic cell; synthetic wheat

期刊名称：GENOME （ 影响因子：2.166； 五年影响因子：2.474 ）

ISSN： 0831-2796

年卷期： 2020 年 63 卷 7 期

页码：

收录情况： SCI

摘要： It is known that both the number and the structure of somatic chromosomes can vary in early generation hexaploid wheats. The phenomenon is generally assumed to arise as a result of the meiotic instability characteristic of freshly created allopolyploids. Here, an analysis of the somatic karyotype of a set of 33 early generation synthetic hexaploid wheats has revealed that variation, taking the form of sub-chromosomal fragments and inter-chromosomal translocations, can also arise in somatic tissue. A possible explanation for the observations was that karyotypic instability in early generation hexaploid wheat probably occurs not just during sporogenesis, but also in somatic tissue. However, other factors such as the use of nitrous oxide during the experiments could also cause the chromosome variations, and additional experimentation would be required to determine the most likely.

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