Identification of Novel Chromosomal Aberrations Induced by Co-60-gamma-Irradiation in Wheat-Dasypyrum villosum Lines

文献类型： 外文期刊

第一作者： Jiang, Yun

作者： Jiang, Yun;Guo, Yuanlin;Xuan, Pu;Zhang, Jie;Li, Guangrong;Yang, Zujun;Xu, Delin;Xuan, Pu

作者机构：

关键词： irradiation;wheat;Dasypyrum villosum;chromosomal aberrations;ND-FISH

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN： 1422-0067

年卷期： 2015 年 16 卷 12 期

页码：

收录情况： SCI

摘要： Mutations induced by radiation are widely used for developing new varieties of plants. To better understand the frequency and pattern of irradiation-induced chromosomal rearrangements, we irradiated the dry seeds of Chinese Spring (CS)-Dasypyrum villosum nullisomic-tetrasomic (6A/6D) addition (6V) line (2n = 44), WD14, with Co-60--rays at dosages of 100, 200, and 300 Gy. The M-0 and M-1 generations were analyzed using Feulgen staining and non-denaturing fluorescence in situ hybridization (ND-FISH) by using oligonucleotide probes. Abnormal mitotic behavior and chromosomes with structural changes were observed in the M-0 plants. In all, 39 M-1 plants had structurally changed chromosomes, with the B genome showing the highest frequency of aberrations and tendency to recombine with chromosomes of the D genome. In addition, 19 M-1 plants showed a variation in chromosome number. The frequency of chromosome loss was considerably higher for 6D than for the alien chromosome 6V, indicating that 6D is less stable after irradiation. Our findings suggested that the newly obtained -induced genetic materials might be beneficial for future wheat breeding programs and functional gene analyses.

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