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Cytogenetic identification and molecular marker development of a novel wheat-Thinopyrum ponticum translocation line with powdery mildew resistance.
Theor Appl Genet. 2022 Jun; 135(6):2041-2057.TA

Abstract

KEY MESSAGE

A new wheat-Thinopyrum ponticum translocation line with excellent powdery mildew resistance was produced, and alien-specific PCR markers and FISH probes were developed by SLAF-seq. Powdery mildew is one of the most threatening diseases in wheat production. Thinopyrum ponticum (Podp.) Barkworth and D. R. Dewey, as a wild relative, has been used for wheat genetic improvement for the better part of a century. In view of the good powdery mildew resistance of Th. ponticum, we have been working to transfer the resistance genes from Th. ponticum to wheat by creating translocation lines. In this study, a new wheat-Th. ponticum translocation line with excellent resistance and agronomic performance was developed and through seedling disease evaluation, gene postulation and diagnostic marker analysis proved to carry a novel Pm gene derived from Th. ponticum. Cytogenetic analysis revealed that a small alien segment was translocated to the terminal of chromosome 1D to form new translocation TTh-1DS·1DL chromosome. The translocation breakpoint was determined to lie in 21.5 Mb region of chromosome 1D by using Wheat660K SNP array analysis. Based on specific-locus amplified fragment sequencing (SLAF-seq) technology, eight molecular markers and one repetitive sequence probe were developed, which were specific for Th. ponticum. Fortunately, the probe could be used in distinguishing six alien chromosome pairs in partial amphiploid Xiaoyan 7430 by fluorescence in situ hybridization (FISH). Furthermore, a Thinopyrum-specific oligonucleotide probe was designed depending on the sequence information of the FISH probe. The novel translocation line could be used in wheat disease resistance breeding, and these specific markers and probes will enable wheat breeders to rapidly trace the alien genome with the novel Pm gene(s).

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Publisher Full Text (DOI)

Authors+Show Affiliations

Yang G
State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing, 100101, China. University of Chinese Academy of Sciences, Beijing, 100049, China.
Tong C
State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing, 100101, China. College of Life Science and Technology, Inner Mongolia Normal University, Hohhot, 010022, China.
Li H
State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing, 100101, China.
Li B
State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing, 100101, China.
Li Z
State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing, 100101, China.
Zheng Q
State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing, 100101, China. qzheng@genetics.ac.cn.

MeSH

Chromosomes, PlantCytogenetic AnalysisDisease ResistanceIn Situ Hybridization, FluorescencePlant BreedingPlant DiseasesPoaceaeTranslocation, GeneticTriticum

Pub Type(s)

Journal Article

Language

eng

PubMed ID

35451594

Citation

Yang, Guotang, et al. "Cytogenetic Identification and Molecular Marker Development of a Novel wheat-Thinopyrum Ponticum Translocation Line With Powdery Mildew Resistance." TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik, vol. 135, no. 6, 2022, pp. 2041-2057.
Yang G, Tong C, Li H, et al. Cytogenetic identification and molecular marker development of a novel wheat-Thinopyrum ponticum translocation line with powdery mildew resistance. Theor Appl Genet. 2022;135(6):2041-2057.
Yang, G., Tong, C., Li, H., Li, B., Li, Z., & Zheng, Q. (2022). Cytogenetic identification and molecular marker development of a novel wheat-Thinopyrum ponticum translocation line with powdery mildew resistance. TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik, 135(6), 2041-2057. https://doi.org/10.1007/s00122-022-04092-1
Yang G, et al. Cytogenetic Identification and Molecular Marker Development of a Novel wheat-Thinopyrum Ponticum Translocation Line With Powdery Mildew Resistance. Theor Appl Genet. 2022;135(6):2041-2057. PubMed PMID: 35451594.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Cytogenetic identification and molecular marker development of a novel wheat-Thinopyrum ponticum translocation line with powdery mildew resistance. AU - Yang,Guotang, AU - Tong,Chunyan, AU - Li,Hongwei, AU - Li,Bin, AU - Li,Zhensheng, AU - Zheng,Qi, Y1 - 2022/04/22/ PY - 2021/12/22/received PY - 2022/03/26/accepted PY - 2022/4/23/pubmed PY - 2022/6/22/medline PY - 2022/4/22/entrez SP - 2041 EP - 2057 JF - TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik JO - Theor Appl Genet VL - 135 IS - 6 N2 - KEY MESSAGE: A new wheat-Thinopyrum ponticum translocation line with excellent powdery mildew resistance was produced, and alien-specific PCR markers and FISH probes were developed by SLAF-seq. Powdery mildew is one of the most threatening diseases in wheat production. Thinopyrum ponticum (Podp.) Barkworth and D. R. Dewey, as a wild relative, has been used for wheat genetic improvement for the better part of a century. In view of the good powdery mildew resistance of Th. ponticum, we have been working to transfer the resistance genes from Th. ponticum to wheat by creating translocation lines. In this study, a new wheat-Th. ponticum translocation line with excellent resistance and agronomic performance was developed and through seedling disease evaluation, gene postulation and diagnostic marker analysis proved to carry a novel Pm gene derived from Th. ponticum. Cytogenetic analysis revealed that a small alien segment was translocated to the terminal of chromosome 1D to form new translocation TTh-1DS·1DL chromosome. The translocation breakpoint was determined to lie in 21.5 Mb region of chromosome 1D by using Wheat660K SNP array analysis. Based on specific-locus amplified fragment sequencing (SLAF-seq) technology, eight molecular markers and one repetitive sequence probe were developed, which were specific for Th. ponticum. Fortunately, the probe could be used in distinguishing six alien chromosome pairs in partial amphiploid Xiaoyan 7430 by fluorescence in situ hybridization (FISH). Furthermore, a Thinopyrum-specific oligonucleotide probe was designed depending on the sequence information of the FISH probe. The novel translocation line could be used in wheat disease resistance breeding, and these specific markers and probes will enable wheat breeders to rapidly trace the alien genome with the novel Pm gene(s). SN - 1432-2242 UR - https://www.unboundmedicine.com/medline/citation/35451594/Cytogenetic_identification_and_molecular_marker_development_of_a_novel_wheat_Thinopyrum_ponticum_translocation_line_with_powdery_mildew_resistance_ DB - PRIME DP - Unbound Medicine ER -