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Identification and origin of Xanthomonas campestrispv.campestris races and related pathovars
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Vicente, Joana G., Conway, J., Roberts, S. J. and Taylor, J. D. (2001) Identification and origin of Xanthomonas campestrispv.campestris races and related pathovars. Phytopathology, 91 (5). pp. 492-499. doi:10.1094/PHYTO.2001.91.5.492 ISSN 0031-949X.
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Official URL: http://dx.doi.org/10.1094/PHYTO.2001.91.5.492
Abstract
One hundred sixty-four isolates of Xanthomonas campestris pv. campestris and other X. campestris pathovars known to infect cruciferous hosts (X. campestris pvs. aberrans, raphani, armoraciae, and incanae) were inoculated onto a differential series of Brassica spp. to determine both pathogenicity to brassicas and race. Of these, 144 isolates were identified as X. campestris pv. campestris and grouped into six races, with races 1 (62%) and 4 (32%) being predominant. Other races were rare. The remaining 20 isolates from brassicas and other cruciferous hosts were either nonpathogenic or very weakly pathogenic on the differential series and could not be race-typed. Five of these isolates, from the ornamental crucifers wallflower (Cheiranthus cheiri), stock (Matthiola incana) and candytuft (Iberis sp.), showed clear evidence of pathovar-like specificity to the hosts of origin. A gene-for-gene model based on the interaction of four avirulence genes in X. campestris pv. campestris races and four matching resistance genes in the differential hosts is proposed. Knowledge of the race structure and worldwide distribution of races is fundamental to the search for sources of resistance and for the establishment of successful resistance breeding programs.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||
Journal or Publication Title: | Phytopathology | ||||
Publisher: | American Phytopathological Society | ||||
ISSN: | 0031-949X | ||||
Official Date: | 2001 | ||||
Dates: |
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Volume: | 91 | ||||
Number: | 5 | ||||
Page Range: | pp. 492-499 | ||||
DOI: | 10.1094/PHYTO.2001.91.5.492 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Open Access (Creative Commons) |
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