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Predominant wheat-alien chromosome translocations in newly developed wheat of China

文献类型： 外文期刊

作者： Wu, Nan 1 ; Lei, Yanhong 1 ; Pei, Dan 2 ; Wu, Hao 1 ; Liu, Xin 1 ; Fang, Jiaxin 1 ; Guo, Jiangtao 1 ; Wang, Conglei 4 ; Guo, 1 ;

作者机构： 1.Nanjing Agr Univ, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Peoples R China

2.Nanjing Agr Univ, Hort Coll, Nanjing 210095, Peoples R China

3.Jiangsu Acad Agr Sci, Inst Food Crops, Prov Key Lab Agrobiol, Nanjing 210014, Peoples R China

4.Tianjin Crops Res Inst, Tianjin 300384, Peoples R China

5.Shanxi Agr Univ, Agr Coll, Taigu 030801, Peoples R China

6.Henan Inst Sci & Technol, Xinxiang 453003, Henan, Peoples R China

7.Shandong Acad Agr Sci, Crop Inst, Jinan 2501000, Peoples R China

8.Zhenjiang Inst Agr Sci, Jurong 212400, Jiangsu, Peoples R China

9.Yangzhou Acad Agr Sci, Yangzhou 225007, Jiangsu, Peoples R China

10.USDA ARS, Edward T Schafer Agr Res Ctr, Fargo, ND 58102 USA

关键词： Founder wheat; T6VS· 6AL; Oligonucleotide FISH; Chromosome fingerprinting; Powdery mildew resistance

期刊名称：MOLECULAR BREEDING （ 影响因子：2.149； 五年影响因子：2.574 ）

ISSN： 1380-3743

年卷期： 2021 年 41 卷 4 期

页码：

收录情况： SCI

摘要： Founder wheat lines have played key role in Chinese wheat improvement. Wheat-Dasypyrum villosum translocation T6VS center dot 6AL has been widely used in wheat breeding in recent years due to its high level of powdery mildew resistance and other beneficial genes. Reference oligo-nucleotide multiplex probe (ONMP)-FISH karyotypes of six T6VS center dot 6AL donor lines were developed and used for characterizing 32 derivative cultivars and lines. T6VS center dot 6AL was present in 27 cultivar/lines with 20 from southern China. Next, ONMP-FISH was used to study chromosome constitution of randomly collected wheat cultivars and advanced breeding lines from southern and northern regions of China: 123 lines from the regional test plots of southern China and 110 from northern China. In southern China, T6VS center dot 6AL (35.8%) was the most predominant variation, while T1RS center dot 1BL (27.3%) was the most predominant in northern China. The pericentric inversion perInv 6B derived from its founder wheat Funo and Abbondaza was the second most predominant chromosome variant in both regions. Other chromosome variants were present in very low frequencies. Additionally, 167 polymorphic chromosome types were identified. Based on these variations, 271 cultivars and lines were clustered into three groups, including southern, northern, and mixed groups that contained wheat from both regions. Different dominant chromosome variations were seen, indicating chromosome differentiation in the three groups of wheat. The clearly identified wheat lines with T6VS center dot 6AL in different backgrounds and oligonucleotide probe set will facilitate their utilization in wheat breeding and in identifying other beneficial traits that may be linked to this translocation.

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