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Identification and mapping of PmG16, a powdery mildew resistance gene derived from wild emmer wheat.
Theor Appl Genet. 2010 Aug; 121(3):499-510.TA

Abstract

The gene-pool of wild emmer wheat, Triticum turgidum ssp. dicoccoides, harbors a rich allelic repertoire for disease resistance. In the current study, we made use of tetraploid wheat mapping populations derived from a cross between durum wheat (cv. Langdon) and wild emmer (accession G18-16) to identify and map a new powdery mildew resistance gene derived from wild emmer wheat. Initially, the two parental lines were screened with a collection of 42 isolates of Blumeria graminis f. sp. tritici (Bgt) from Israel and 5 isolates from Switzerland. While G18-16 was resistant to 34 isolates, Langdon was resistant only to 5 isolates and susceptible to 42 isolates. Isolate Bgt#15 was selected to differentiate between the disease reactions of the two genotypes. Segregation ratio of F(2-3) and recombinant inbreed line (F(7)) populations to inoculation with isolate Bgt#15 indicated the role of a single dominant gene in conferring resistance to Bgt#15. This gene, temporarily designated PmG16, was located on the distal region of chromosome arm 7AL. Genetic map of PmG16 region was assembled with 32 simple sequence repeat (SSR), sequence tag site (STS), Diversity array technology (DArT) and cleaved amplified polymorphic sequence (CAPS) markers and assigned to the 7AL physical bin map (7AL-16). Using four DNA markers we established colinearity between the genomic region spanning the PmG16 locus within the distal region of chromosome arm 7AL and the genomic regions on rice chromosome 6 and Brachypodium Bd1. A comparative analysis was carried out between PmG16 and other known Pm genes located on chromosome arm 7AL. The identified PmG16 may facilitate the use of wild alleles for improvement of powdery mildew resistance in elite wheat cultivars via marker-assisted selection.

Authors+Show Affiliations

Department of Evolutionary and Environmental Biology, The Institute of Evolution, Faculty of Science and Science Education, University of Haifa, Mt. Carmel, 31905, Haifa, Israel.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20407741

Citation

Ben-David, Roi, et al. "Identification and Mapping of PmG16, a Powdery Mildew Resistance Gene Derived From Wild Emmer Wheat." TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik, vol. 121, no. 3, 2010, pp. 499-510.
Ben-David R, Xie W, Peleg Z, et al. Identification and mapping of PmG16, a powdery mildew resistance gene derived from wild emmer wheat. Theor Appl Genet. 2010;121(3):499-510.
Ben-David, R., Xie, W., Peleg, Z., Saranga, Y., Dinoor, A., & Fahima, T. (2010). Identification and mapping of PmG16, a powdery mildew resistance gene derived from wild emmer wheat. TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik, 121(3), 499-510. https://doi.org/10.1007/s00122-010-1326-5
Ben-David R, et al. Identification and Mapping of PmG16, a Powdery Mildew Resistance Gene Derived From Wild Emmer Wheat. Theor Appl Genet. 2010;121(3):499-510. PubMed PMID: 20407741.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Identification and mapping of PmG16, a powdery mildew resistance gene derived from wild emmer wheat. AU - Ben-David,Roi, AU - Xie,Weilong, AU - Peleg,Zvi, AU - Saranga,Yehoshua, AU - Dinoor,Amos, AU - Fahima,Tzion, Y1 - 2010/04/21/ PY - 2009/12/12/received PY - 2010/03/12/accepted PY - 2010/4/22/entrez PY - 2010/4/22/pubmed PY - 2010/10/13/medline SP - 499 EP - 510 JF - TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik JO - Theor Appl Genet VL - 121 IS - 3 N2 - The gene-pool of wild emmer wheat, Triticum turgidum ssp. dicoccoides, harbors a rich allelic repertoire for disease resistance. In the current study, we made use of tetraploid wheat mapping populations derived from a cross between durum wheat (cv. Langdon) and wild emmer (accession G18-16) to identify and map a new powdery mildew resistance gene derived from wild emmer wheat. Initially, the two parental lines were screened with a collection of 42 isolates of Blumeria graminis f. sp. tritici (Bgt) from Israel and 5 isolates from Switzerland. While G18-16 was resistant to 34 isolates, Langdon was resistant only to 5 isolates and susceptible to 42 isolates. Isolate Bgt#15 was selected to differentiate between the disease reactions of the two genotypes. Segregation ratio of F(2-3) and recombinant inbreed line (F(7)) populations to inoculation with isolate Bgt#15 indicated the role of a single dominant gene in conferring resistance to Bgt#15. This gene, temporarily designated PmG16, was located on the distal region of chromosome arm 7AL. Genetic map of PmG16 region was assembled with 32 simple sequence repeat (SSR), sequence tag site (STS), Diversity array technology (DArT) and cleaved amplified polymorphic sequence (CAPS) markers and assigned to the 7AL physical bin map (7AL-16). Using four DNA markers we established colinearity between the genomic region spanning the PmG16 locus within the distal region of chromosome arm 7AL and the genomic regions on rice chromosome 6 and Brachypodium Bd1. A comparative analysis was carried out between PmG16 and other known Pm genes located on chromosome arm 7AL. The identified PmG16 may facilitate the use of wild alleles for improvement of powdery mildew resistance in elite wheat cultivars via marker-assisted selection. SN - 1432-2242 UR - https://www.unboundmedicine.com/medline/citation/20407741/Identification_and_mapping_of_PmG16_a_powdery_mildew_resistance_gene_derived_from_wild_emmer_wheat_ L2 - https://dx.doi.org/10.1007/s00122-010-1326-5 DB - PRIME DP - Unbound Medicine ER -