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Microsatellite primers indicate the presence of asexual populations of Venturia inaequalis in coastal Israeli apple orchards
Year:
2003
Source of publication :
Phytoparasitica
Authors :
Freeman, Stanley
;
.
Shabi, Ezra
;
.
Volume :
31
Co-Authors:
Boehm, E.W.A., Dept. of Biology, SUNY Potsdam, Potsdam, NY 13676-2294, United States
Freeman, S., Dept. of Plant Pathology, ARO, Volcani Center, Bet Dagan 50250, Israel
Shabi, E., Dept. of Plant Pathology, ARO, Volcani Center, Bet Dagan 50250, Israel
Michailides, T.J., Dept. of Plant Pathology, University of California Davis, Kearney Agricultural Center, Parlier, CA 93648, United States
Facilitators :
From page:
236
To page:
251
(
Total pages:
16
)
Abstract:
This study was initiated to determine whether differences in genotypic diversity among populations of Venturia inaequalis (Cke.) Wint., as detected using neutral genetic markers, were related to the ecological conditions in which apples are grown in Israel. Since sexual reproduction in this fungal pathogen has an obligate requirement for sustained low winter temperatures, and since these requirements in Israel are met only on the Golan Heights, we were interested in whether lower elevation populations of this pathogen might be comprised of asexual clonal lineages. Unlike temperate apple growing regions; where the primary spring inoculum is ascosporic derived from overwintered pseudothecia, Israeli apple orchards at lower elevations in the Hula Valley and along the coastal plain rarely if ever experience low winter temperatures and pseudothecia have never been recovered. Two orchards were sampled from the Golan Heights (El Rom and Ortal, n = 38) and three orchards from the Hula Valley and coastal plain (Sede Eliezer, Ginaton and Be'er Tuvia, n = 40). Microsatellite primers were used to analyze population structure and the resulting binary data analyzed by both cluster and parsimony analysis. Populations from the coastal plain were genetically uniform within each of the orchards sampled, whereas populations from the Golan Heights showed levels of genotypic diversity ten times as high. The data support field observations that this pathogen does not reproduce sexually in regions characterized by the absence of low winter temperatures and is instead composed of clonal lineages. This may have bearing on control strategies for the disease in Israel.
Note:

See also the attached poster: "The influence of climate on sexual reproduction in the Apple Scab Fungus Venturia inaequalis in Israel"

https://www.eboehm.com/wp-content/uploads/2018/11/boehm_vi_portrait_36_x_48.pdf

Related Files :
Apple scab
fungi
Loculoascomycete
Malus
Myxogastria
Spilocea pomi
transposons
Venturia inaequalis
Show More
Related Content
More details
DOI :
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
27348
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:30
You may also be interested in
Scientific Publication
Microsatellite primers indicate the presence of asexual populations of Venturia inaequalis in coastal Israeli apple orchards
31
Boehm, E.W.A., Dept. of Biology, SUNY Potsdam, Potsdam, NY 13676-2294, United States
Freeman, S., Dept. of Plant Pathology, ARO, Volcani Center, Bet Dagan 50250, Israel
Shabi, E., Dept. of Plant Pathology, ARO, Volcani Center, Bet Dagan 50250, Israel
Michailides, T.J., Dept. of Plant Pathology, University of California Davis, Kearney Agricultural Center, Parlier, CA 93648, United States
Microsatellite primers indicate the presence of asexual populations of Venturia inaequalis in coastal Israeli apple orchards
This study was initiated to determine whether differences in genotypic diversity among populations of Venturia inaequalis (Cke.) Wint., as detected using neutral genetic markers, were related to the ecological conditions in which apples are grown in Israel. Since sexual reproduction in this fungal pathogen has an obligate requirement for sustained low winter temperatures, and since these requirements in Israel are met only on the Golan Heights, we were interested in whether lower elevation populations of this pathogen might be comprised of asexual clonal lineages. Unlike temperate apple growing regions; where the primary spring inoculum is ascosporic derived from overwintered pseudothecia, Israeli apple orchards at lower elevations in the Hula Valley and along the coastal plain rarely if ever experience low winter temperatures and pseudothecia have never been recovered. Two orchards were sampled from the Golan Heights (El Rom and Ortal, n = 38) and three orchards from the Hula Valley and coastal plain (Sede Eliezer, Ginaton and Be'er Tuvia, n = 40). Microsatellite primers were used to analyze population structure and the resulting binary data analyzed by both cluster and parsimony analysis. Populations from the coastal plain were genetically uniform within each of the orchards sampled, whereas populations from the Golan Heights showed levels of genotypic diversity ten times as high. The data support field observations that this pathogen does not reproduce sexually in regions characterized by the absence of low winter temperatures and is instead composed of clonal lineages. This may have bearing on control strategies for the disease in Israel.

See also the attached poster: "The influence of climate on sexual reproduction in the Apple Scab Fungus Venturia inaequalis in Israel"

https://www.eboehm.com/wp-content/uploads/2018/11/boehm_vi_portrait_36_x_48.pdf

Scientific Publication
You may also be interested in