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Pincot, Dominique D. A.; Feldmann, Mitchell J.; Hardigan, Michael A.; Vachev, Mishi V.; Henry, Peter M.; Gordon, Thomas R.; Bjornson, Marta; Rodriguez, Alan; Cobo, Nicolas; Famula, Randi A.; Cole, Glenn S.; Coaker, Gitta L.; Knapp, Steven J.

Novel Fusarium wilt resistance genes uncovered in natural and cultivated strawberry populations are found on three non-homoeologous chromosomes

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  • Media type: E-Article
  • Title: Novel Fusarium wilt resistance genes uncovered in natural and cultivated strawberry populations are found on three non-homoeologous chromosomes
  • Contributor: Pincot, Dominique D. A.; Feldmann, Mitchell J.; Hardigan, Michael A.; Vachev, Mishi V.; Henry, Peter M.; Gordon, Thomas R.; Bjornson, Marta; Rodriguez, Alan; Cobo, Nicolas; Famula, Randi A.; Cole, Glenn S.; Coaker, Gitta L.; Knapp, Steven J.
  • imprint: Springer Science and Business Media LLC, 2022
  • Published in: Theoretical and Applied Genetics
  • Language: English
  • DOI: 10.1007/s00122-022-04102-2
  • ISSN: 1432-2242; 0040-5752
  • Origination:
  • Footnote:
  • Description: <jats:title>Abstract</jats:title><jats:sec> <jats:title>Key Message</jats:title> <jats:p><jats:bold>Several Fusarium wilt resistance genes were discovered, genetically and physically mapped, and rapidly deployed via marker-assisted selection to develop cultivars resistant to</jats:bold><jats:bold><jats:italic>Fusarium oxysporum</jats:italic></jats:bold><jats:bold>f. sp.</jats:bold><jats:bold><jats:italic>fragariae</jats:italic></jats:bold>, <jats:bold>a devastating soil-borne pathogen of strawberry</jats:bold>.</jats:p> </jats:sec><jats:sec> <jats:title>Abstract</jats:title> <jats:p>Fusarium wilt, a soilborne disease caused by <jats:italic>Fusarium oxysporum</jats:italic> f. sp. <jats:italic>fragariae</jats:italic>, poses a significant threat to strawberry (<jats:italic>Fragaria</jats:italic><jats:inline-formula><jats:alternatives><jats:tex-math>$$\times$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mo>×</mml:mo> </mml:math></jats:alternatives></jats:inline-formula><jats:italic>ananassa</jats:italic>) production in many parts of the world. This pathogen causes wilting, collapse, and death in susceptible genotypes. We previously identified a dominant gene (<jats:italic>FW1</jats:italic>) on chromosome 2B that confers resistance to race 1 of the pathogen, and hypothesized that gene-for-gene resistance to Fusarium wilt was widespread in strawberry. To explore this, a genetically diverse collection of heirloom and modern cultivars and octoploid ecotypes were screened for resistance to Fusarium wilt races 1 and 2. Here, we show that resistance to both races is widespread in natural and domesticated populations and that resistance to race 1 is conferred by partially to completely dominant alleles among loci (<jats:italic>FW1</jats:italic>, <jats:italic>FW2</jats:italic>, <jats:italic>FW3</jats:italic>, <jats:italic>FW4</jats:italic>, and <jats:italic>FW5</jats:italic>) found on three non-homoeologous chromosomes (1A, 2B, and 6B). The underlying genes have not yet been cloned and functionally characterized; however, plausible candidates were identified that encode pattern recognition receptors or other proteins known to confer gene-for-gene resistance in plants. High-throughput genotyping assays for SNPs in linkage disequilibrium with <jats:italic>FW1</jats:italic>-<jats:italic>FW5</jats:italic> were developed to facilitate marker-assisted selection and accelerate the development of race 1 resistant cultivars. This study laid the foundation for identifying the genes encoded by <jats:italic>FW1-FW5</jats:italic>, in addition to exploring the genetics of resistance to race 2 and other races of the pathogen, as a precaution to averting a Fusarium wilt pandemic.</jats:p> </jats:sec>