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Identification of a major dominant gene for race-nonspecific tan spot resistance in wild emmer wheat.
Theor Appl Genet. 2020 Mar; 133(3):829-841.TA

Abstract

KEY MESSAGE

A single dominant gene found in tetraploid and hexaploid wheat controls broad-spectrum race-nonspecific resistance to the foliar disease tan spot caused by Pyrenophora tritici-repentis. Tan spot is an important foliar disease of durum and common wheat caused by the necrotrophic fungal pathogen Pyrenophora tritici-repentis. Genetic studies in common wheat have shown that pathogen-produced necrotrophic effectors interact with host genes in an inverse gene-for-gene manner to cause disease, but quantitative trait loci (QTLs) with broad race-nonspecific resistance also exist. Less work has been done to understand the genetics of tan spot interactions in durum wheat. Here, we evaluated a set of Langdon durum-wild emmer (Triticum turgidum ssp. dicoccoides) disomic chromosome substitution lines for reaction to four P. tritici-repentis isolates representing races 1, 2, 3, and 5 to identify wild emmer chromosomes potentially containing tan spot resistance genes. Chromosome 3B from the wild emmer accession IsraelA rendered the tan spot-susceptible durum cultivar Langdon resistant to all four fungal isolates. Genetic analysis indicated that a single dominant gene, designated Tsr7, governed resistance. Detailed mapping experiments showed that the Tsr7 locus is likely the same as the race-nonspecific QTL previously identified in the hexaploid wheat cultivars BR34 and Penawawa. Four user-friendly SNP-based semi-thermal asymmetric reverse PCR (STARP) markers cosegregated with Tsr7 and should be useful for marker-assisted selection of resistance. In addition to 3B, other wild emmer chromosomes contributed moderate levels of tan spot resistance, and, as has been shown previously for tetraploid wheat, the Tsn1-Ptr ToxA interaction was not associated with susceptibility. This is the first report of a major dominant gene governing resistance to tan spot in tetraploid wheat.

Authors+Show Affiliations

Northern Crop Science Laboratory, Cereal Crops Research Unit, Edward T. Schafer Agricultural Research Center, USDA-Agricultural Research Service, 1616 Albrecht Blvd. North, Fargo, ND, 58102-2765, USA. Justin.Faris@usda.gov.Northern Crop Science Laboratory, Cereal Crops Research Unit, Edward T. Schafer Agricultural Research Center, USDA-Agricultural Research Service, 1616 Albrecht Blvd. North, Fargo, ND, 58102-2765, USA.Department of Plant Pathology, North Dakota State University, 306 Walster Hall, Fargo, ND, 58105, USA.Department of Crop and Soil Sciences, Washington State University, Pullman, WA, 99164, USA.Northern Crop Science Laboratory, Cereal Crops Research Unit, Edward T. Schafer Agricultural Research Center, USDA-Agricultural Research Service, 1616 Albrecht Blvd. North, Fargo, ND, 58102-2765, USA.Department of Plant Pathology, North Dakota State University, 306 Walster Hall, Fargo, ND, 58105, USA. zhh.liu@ndsu.edu.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31863156

Citation

Faris, Justin D., et al. "Identification of a Major Dominant Gene for Race-nonspecific Tan Spot Resistance in Wild Emmer Wheat." TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik, vol. 133, no. 3, 2020, pp. 829-841.
Faris JD, Overlander ME, Kariyawasam GK, et al. Identification of a major dominant gene for race-nonspecific tan spot resistance in wild emmer wheat. Theor Appl Genet. 2020;133(3):829-841.
Faris, J. D., Overlander, M. E., Kariyawasam, G. K., Carter, A., Xu, S. S., & Liu, Z. (2020). Identification of a major dominant gene for race-nonspecific tan spot resistance in wild emmer wheat. TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik, 133(3), 829-841. https://doi.org/10.1007/s00122-019-03509-8
Faris JD, et al. Identification of a Major Dominant Gene for Race-nonspecific Tan Spot Resistance in Wild Emmer Wheat. Theor Appl Genet. 2020;133(3):829-841. PubMed PMID: 31863156.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Identification of a major dominant gene for race-nonspecific tan spot resistance in wild emmer wheat. AU - Faris,Justin D, AU - Overlander,Megan E, AU - Kariyawasam,Gayan K, AU - Carter,Arron, AU - Xu,Steven S, AU - Liu,Zhaohui, Y1 - 2019/12/20/ PY - 2019/05/28/received PY - 2019/12/10/accepted PY - 2019/12/22/pubmed PY - 2020/11/20/medline PY - 2019/12/22/entrez SP - 829 EP - 841 JF - TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik JO - Theor Appl Genet VL - 133 IS - 3 N2 - KEY MESSAGE: A single dominant gene found in tetraploid and hexaploid wheat controls broad-spectrum race-nonspecific resistance to the foliar disease tan spot caused by Pyrenophora tritici-repentis. Tan spot is an important foliar disease of durum and common wheat caused by the necrotrophic fungal pathogen Pyrenophora tritici-repentis. Genetic studies in common wheat have shown that pathogen-produced necrotrophic effectors interact with host genes in an inverse gene-for-gene manner to cause disease, but quantitative trait loci (QTLs) with broad race-nonspecific resistance also exist. Less work has been done to understand the genetics of tan spot interactions in durum wheat. Here, we evaluated a set of Langdon durum-wild emmer (Triticum turgidum ssp. dicoccoides) disomic chromosome substitution lines for reaction to four P. tritici-repentis isolates representing races 1, 2, 3, and 5 to identify wild emmer chromosomes potentially containing tan spot resistance genes. Chromosome 3B from the wild emmer accession IsraelA rendered the tan spot-susceptible durum cultivar Langdon resistant to all four fungal isolates. Genetic analysis indicated that a single dominant gene, designated Tsr7, governed resistance. Detailed mapping experiments showed that the Tsr7 locus is likely the same as the race-nonspecific QTL previously identified in the hexaploid wheat cultivars BR34 and Penawawa. Four user-friendly SNP-based semi-thermal asymmetric reverse PCR (STARP) markers cosegregated with Tsr7 and should be useful for marker-assisted selection of resistance. In addition to 3B, other wild emmer chromosomes contributed moderate levels of tan spot resistance, and, as has been shown previously for tetraploid wheat, the Tsn1-Ptr ToxA interaction was not associated with susceptibility. This is the first report of a major dominant gene governing resistance to tan spot in tetraploid wheat. SN - 1432-2242 UR - https://www.unboundmedicine.com/medline/citation/31863156/Identification_of_a_major_dominant_gene_for_race_nonspecific_tan_spot_resistance_in_wild_emmer_wheat_ L2 - https://dx.doi.org/10.1007/s00122-019-03509-8 DB - PRIME DP - Unbound Medicine ER -