Huanhuan Li, Fu Guo, Yanlong Zhao, Chaoli Wang, Ziwei Fan, Yajun Feng, Xiang Ji, Luna Tao, Chao Ma, Jiajun Qian, Yue Zhao, Qianwen Liu, Sunish K Sehgal, Cheng Liu, Wenxuan Liu
{"title":"Construction of a physical map for Aegilops geniculata chromosome 7M<sup>g</sup> and localization of its novel purple coleoptile gene.","authors":"Huanhuan Li, Fu Guo, Yanlong Zhao, Chaoli Wang, Ziwei Fan, Yajun Feng, Xiang Ji, Luna Tao, Chao Ma, Jiajun Qian, Yue Zhao, Qianwen Liu, Sunish K Sehgal, Cheng Liu, Wenxuan Liu","doi":"10.1007/s00122-024-04792-w","DOIUrl":null,"url":null,"abstract":"<p><strong>Key message: </strong>A physical map of Aegilops geniculata chromosome 7M<sup>g</sup> was constructed, and a novel purple coleoptile gene was localized at 7M<sup>g</sup>S bin FL 0.60-0.65 by development of wheat-Ae. geniculata structural aberrations. The development of wheat-wild relative chromosomal structure aberrations not only provides novel germplasm resources for wheat improvement, but also aids in mapping desirable genes to specific chromosomal regions. Aegilops geniculata (2n = 4x = 28, U<sup>g</sup>U<sup>g</sup>M<sup>g</sup>M<sup>g</sup>), a wild relative of common wheat, possesses many favorable genes. In this study, Ae. geniculata chromosome 7M<sup>g</sup> was identified as harboring a purple coleoptile gene by phenotypic evaluation of Chinese Spring (CS)-Ae. geniculata addition and substitution lines. To construct a physical map of chromosome 7M<sup>g</sup> and localize the purple coleoptile gene, 59 molecular markers specific to 7M<sup>g</sup> were developed, and 43 wheat-Ae. geniculata 7M<sup>g</sup> chromosome structure aberrations were generated based on chromosome centromeric breakage-fusion and ph1b-induced homoeologous recombination. Segment sizes and breakpoint positions of each 7M<sup>g</sup> structure aberration were further characterized using in situ hybridization and molecular marker analysis. Consequently, a physical map of chromosome 7M<sup>g</sup> was constructed with 59 molecular markers, comprising six bins with 28 markers on 7M<sup>g</sup>S and six bins with 31 markers on 7M<sup>g</sup>L, and the purple coleoptile gene was mapped to an interval of FL 0.60-0.65 on 7M<sup>g</sup>S. The newly developed wheat-Ae. geniculata 7M<sup>g</sup> structural aberrations and the physical map of 7M<sup>g</sup> will facilitate the transfer and utilization of desirable genes from 7M<sup>g</sup> in the future.</p>","PeriodicalId":22955,"journal":{"name":"Theoretical and Applied Genetics","volume":"138 1","pages":"4"},"PeriodicalIF":4.4000,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Theoretical and Applied Genetics","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1007/s00122-024-04792-w","RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRONOMY","Score":null,"Total":0}
引用次数: 0
Abstract
Key message: A physical map of Aegilops geniculata chromosome 7Mg was constructed, and a novel purple coleoptile gene was localized at 7MgS bin FL 0.60-0.65 by development of wheat-Ae. geniculata structural aberrations. The development of wheat-wild relative chromosomal structure aberrations not only provides novel germplasm resources for wheat improvement, but also aids in mapping desirable genes to specific chromosomal regions. Aegilops geniculata (2n = 4x = 28, UgUgMgMg), a wild relative of common wheat, possesses many favorable genes. In this study, Ae. geniculata chromosome 7Mg was identified as harboring a purple coleoptile gene by phenotypic evaluation of Chinese Spring (CS)-Ae. geniculata addition and substitution lines. To construct a physical map of chromosome 7Mg and localize the purple coleoptile gene, 59 molecular markers specific to 7Mg were developed, and 43 wheat-Ae. geniculata 7Mg chromosome structure aberrations were generated based on chromosome centromeric breakage-fusion and ph1b-induced homoeologous recombination. Segment sizes and breakpoint positions of each 7Mg structure aberration were further characterized using in situ hybridization and molecular marker analysis. Consequently, a physical map of chromosome 7Mg was constructed with 59 molecular markers, comprising six bins with 28 markers on 7MgS and six bins with 31 markers on 7MgL, and the purple coleoptile gene was mapped to an interval of FL 0.60-0.65 on 7MgS. The newly developed wheat-Ae. geniculata 7Mg structural aberrations and the physical map of 7Mg will facilitate the transfer and utilization of desirable genes from 7Mg in the future.
期刊介绍:
Theoretical and Applied Genetics publishes original research and review articles in all key areas of modern plant genetics, plant genomics and plant biotechnology. All work needs to have a clear genetic component and significant impact on plant breeding. Theoretical considerations are only accepted in combination with new experimental data and/or if they indicate a relevant application in plant genetics or breeding. Emphasizing the practical, the journal focuses on research into leading crop plants and articles presenting innovative approaches.