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Molecular Diagnosis and Diversity for Regulated Xanthomonas
Bacterial virulence factors
This DokuWiki is based upon work from COST Action CA16107 EuroXanth, supported by COST (European Cooperation in Science and Technology)
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Author: Inga Moročko-Bičevska (Joël F. Pothier)
Internal reviewer: Giusy D'Attoma
Expert reviewer: WANTED!
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Wild accessions US4808 (native Fragaria virginiana clone SG-89 from Minesota) and US4809 (hybrid between F. virginiana clone SG-26 from Georgia and F. x ananassa ‘Earliglow’) (Maas et al., 2002; Hartung et al., 2003; Roach et al., 2016).
QTL mapped on linkage group 6D (Roach et al., 2016).
SNPs (Roach et al., 2016).
Accessions US4808 and US4809 were identified as resistant to the four genetic clades of X. fragariae (Maas et al., 2002; Hartung et al., 2003). Introgression of the trait into commercial quality perennial-type germplasm was initiated by Roach et al. (2016). Resistance detected in two wild accessions US4808 and US4809 was found to be highly heritable and controlled by a major locus FaRXf1 on linkage group 6D (Roach et al., 2016). Annotation of the FaRXf1 region in F. vesca genome revealed the presence of several resistance-associated genes, including nucleotide-binding leucine-rich repeat (NB-LRRs), zinc finger and serine/threonine-protein kinase genes (Roach et al., 2016). Allelic diversity at the FaRXf1 locus is unknown.
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Hartung JS, Gouin CC, Lewers KS, Maas JL, Hokanson S (2003). Identification of sources of resistance to bacterial angular leafspot disease of strawberry. Acta Hort. 626: 155-159. DOI: 10.17660/ActaHortic.2003.626.20
Maas JL, Gouin CC, Hokanson SC, Hartung JS (2002). Strawberry parent clones US 4808 and US 4809 resistant to bacterial angular leafspot disease caused by Xanthomonas fragariae. HortScience 37: 716-717. DOI: 10.21273/HORTSCI.37.4.716
Roach JA, Verma S, Peres NA, Jamieson AR, van de Weg WE, Bink MCAM, Bassil NV, Lee S, Whitaker VM (2016). FaRXf1: a locus conferring resistance to angular leaf spot caused by Xanthomonas fragariae in octoploid strawberry. Theor. Appl. Genet. 129: 1191-1201. DOI: 10.1007/s00122-016-2695-1
This fact sheet is based upon work from COST Action CA16107 EuroXanth, supported by COST (European Cooperation in Science and Technology).
