Integrating the physical and genetic map of bread wheat facilitates the detection of chromosomal rearrangements
| Autor: | Liu Deng-cai, Ning Shunzong, Wang JiRui, Zheng You-liang, Yuan Zhong-wei, Luo Jiang-tao, Zhang Lianquan, Hao Ming, Huang Lei, Xie Die, Zhao Lai-bin, Jiang Bo, Zhang Shu-jie |
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| Rok vydání: | 2021 |
| Předmět: |
Genetics
Ecology medicine.diagnostic_test food and beverages Chromosomal translocation Single-nucleotide polymorphism Plant Science Biology Biochemistry Genome chemistry.chemical_compound Food Animals Tandem repeat chemistry Chromosomal region medicine Animal Science and Zoology Repeated sequence Agronomy and Crop Science DNA Food Science Fluorescence in situ hybridization |
| Zdroj: | Journal of Integrative Agriculture. 20:2333-2342 |
| ISSN: | 2095-3119 |
| Popis: | The bread wheat genome harbors a high content of repetitive DNA, which is amenable to detection and characterization using fluorescence in situ hybridization (FISH) karyotyping. An integrated genetic map was derived from a recombinant inbred population bred from a cross between a synthetic hexaploid wheat and a commercial Chinese bread wheat cultivar, based on 28 variable FISH sites and >150 000 single nucleotide polymorphism (SNP) loci. The majority (20/28) of the variable FISH sites were physically located within a chromosomal region consistent with the genetic location inferred from that of their co-segregating SNP loci. The eight exceptions reflected the presence of either a translocation (1R/1B, 1A/7A) or a presumptive intra-chromosomal inversion (4A). For eight out of the nine FISH sites detected on the Chinese Spring (CS) karyotype, there was a good match with the reference genome sequence, indicating that the most recent assembly has dealt well with the problem of placing tandem repeats. The integrated genetic map produced for wheat is informative as to the location of blocks of tandemly repeated DNA and can aid in improving the quality of the genome sequence assembly in regions surrounding these blocks. |
| Databáze: | OpenAIRE |
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