TY - JOUR
T1 - Vegetative compatibility groups in colletotrichum coccodes subpopulations from Australia and genetic links with subpopulations from Europe/Israel and North America
AU - Ben-Deniel, B.
AU - Bar-Zvi, D.
AU - Johnson, D.
AU - Harding, R.
AU - Hazanovsky, M.
AU - Tsror, Lahkim
PY - 2010/3/1
Y1 - 2010/3/1
N2 - Vegetative compatibility of 94 isolates of Colletotrichum coccodes from Australia originating from potato, soil, and a weed (Solanum esuriale) was tested using nitrate-nonutilizing (nit) mutants. Isolates distributed to six vegetative compatibility groups (VCGs), five of them multimember (24.5, 23.4, 13.8, 12.8, and 7.5% distribution) and only one composed of two isolates (2.1%); 15.9% of them were not assigned to any of the VCGs. Aggressiveness of 51 isolates representing all six VCGs was tested by mature green tomato bioassay: isolates assigned to AUS-VCG-4 were the most aggressive and those in AUSVCG- 3 the least (P < 0.05). Isolates from warmer climates and lower latitudes were more aggressive (P < 0.05). In ad ition, we report for the first time complementations between isolates from Australia (AUS); North America (NA); and Israel, The Netherlands, Scotland, France, Germany (EU/I). Isolates assigned to AUS-VCG-4 anastomosed with isolates assigned to EU/I-VCG-7 and NA-VCG-5 (which also anastomosed with each other). Isolates assigned to EU/I-VCG-6 anastomosed with isolates assigned to NA-VCG-2 and isolates assigned to AUS-VCG-2 anastomosed with isolates assigned to EU/I-VCG-2. The linkage between subpopulations could result from the limited exchange of seed tubers among continents, or could be due to, for instance, gene flow, selection, or a limited number of polymorphic vegetative incompatibility genes.
AB - Vegetative compatibility of 94 isolates of Colletotrichum coccodes from Australia originating from potato, soil, and a weed (Solanum esuriale) was tested using nitrate-nonutilizing (nit) mutants. Isolates distributed to six vegetative compatibility groups (VCGs), five of them multimember (24.5, 23.4, 13.8, 12.8, and 7.5% distribution) and only one composed of two isolates (2.1%); 15.9% of them were not assigned to any of the VCGs. Aggressiveness of 51 isolates representing all six VCGs was tested by mature green tomato bioassay: isolates assigned to AUS-VCG-4 were the most aggressive and those in AUSVCG- 3 the least (P < 0.05). Isolates from warmer climates and lower latitudes were more aggressive (P < 0.05). In ad ition, we report for the first time complementations between isolates from Australia (AUS); North America (NA); and Israel, The Netherlands, Scotland, France, Germany (EU/I). Isolates assigned to AUS-VCG-4 anastomosed with isolates assigned to EU/I-VCG-7 and NA-VCG-5 (which also anastomosed with each other). Isolates assigned to EU/I-VCG-6 anastomosed with isolates assigned to NA-VCG-2 and isolates assigned to AUS-VCG-2 anastomosed with isolates assigned to EU/I-VCG-2. The linkage between subpopulations could result from the limited exchange of seed tubers among continents, or could be due to, for instance, gene flow, selection, or a limited number of polymorphic vegetative incompatibility genes.
KW - Aggressiveness
KW - Anastomosis
KW - Black dot
UR - http://www.scopus.com/inward/record.url?scp=77749291741&partnerID=8YFLogxK
U2 - 10.1094/PHYTO-100-3-0271
DO - 10.1094/PHYTO-100-3-0271
M3 - Article
C2 - 20128701
AN - SCOPUS:77749291741
SN - 0031-949X
VL - 100
SP - 271
EP - 278
JO - Phytopathology
JF - Phytopathology
IS - 3
ER -