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Environmental effects on molecular and phenotypic variation in populations of Eruca sativa across a steep climatic gradient
Year:
2013
Source of publication :
Ecology and Evolution
Authors :
Barazani, Oz
;
.
Ohali, Shachar
;
.
Volume :
3
Co-Authors:
Westberg, E., Institute of Plant Sciences, Israel Plant Gene Bank, Agricultural Research Organization, 50250 Bet Dagan, Ireland, Institut für Spezielle Botanik und Botanischer Garten, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
Ohali, S., Institute of Plant Sciences, Israel Plant Gene Bank, Agricultural Research Organization, 50250 Bet Dagan, Ireland
Shevelevich, A., Institute of Plant Sciences, Israel Plant Gene Bank, Agricultural Research Organization, 50250 Bet Dagan, Ireland, The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, 76100 Rehovot, Ireland
Fine, P., Department of Soil Chemistry, Plant Nutrition and Microbiology, Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization, 50250 Bet Dagan, Ireland
Barazani, O., Institute of Plant Sciences, Israel Plant Gene Bank, Agricultural Research Organization, 50250 Bet Dagan, Ireland
Facilitators :
From page:
2471
To page:
2484
(
Total pages:
14
)
Abstract:
In Israel Eruca sativa has a geographically narrow distribution across a steep climatic gradient that ranges from mesic Mediterranean to hot desert environments. These conditions offer an opportunity to study the influence of the environment on intraspecific genetic variation. For this, we combined an analysis of neutral genetic markers with a phenotypic evaluation in common-garden experiments, and environmental characterization of populations that included climatic and edaphic parameters, as well as geographic distribution. A Bayesian clustering of individuals from nine representative populations based on amplified fragment length polymorphism (AFLP) divided the populations into a southern and a northern geographic cluster, with one admixed population at the geographic border between them. Linear mixed models, with cluster added as a grouping factor, revealed no clear effects of environment or geography on genetic distances, but this may be due to a strong association of geography and environment with genetic clusters. However, environmental factors accounted for part of the phenotypic variation observed in the common-garden experiments. In addition, candidate loci for selection were identified by association with environmental parameters and by two outlier methods. One locus, identified by all three methods, also showed an association with trichome density and herbivore damage, in net-house and field experiments, respectively. Accordingly, we propose that because trichomes are directly linked to defense against both herbivores and excess radiation, they could potentially be related to adaptive variation in these populations. These results demonstrate the value of combining environmental and phenotypic data with a detailed genetic survey when studying adaptation in plant populations. © 2013 The Authors.
Note:
Related Files :
Environmental adaptation
Eruca sativa
genetic diversity
Outlier loci
phenotypic variation
Show More
Related Content
More details
DOI :
10.1002/ece3.646
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
32783
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:12
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Scientific Publication
Environmental effects on molecular and phenotypic variation in populations of Eruca sativa across a steep climatic gradient
3
Westberg, E., Institute of Plant Sciences, Israel Plant Gene Bank, Agricultural Research Organization, 50250 Bet Dagan, Ireland, Institut für Spezielle Botanik und Botanischer Garten, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
Ohali, S., Institute of Plant Sciences, Israel Plant Gene Bank, Agricultural Research Organization, 50250 Bet Dagan, Ireland
Shevelevich, A., Institute of Plant Sciences, Israel Plant Gene Bank, Agricultural Research Organization, 50250 Bet Dagan, Ireland, The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, 76100 Rehovot, Ireland
Fine, P., Department of Soil Chemistry, Plant Nutrition and Microbiology, Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization, 50250 Bet Dagan, Ireland
Barazani, O., Institute of Plant Sciences, Israel Plant Gene Bank, Agricultural Research Organization, 50250 Bet Dagan, Ireland
Environmental effects on molecular and phenotypic variation in populations of Eruca sativa across a steep climatic gradient
In Israel Eruca sativa has a geographically narrow distribution across a steep climatic gradient that ranges from mesic Mediterranean to hot desert environments. These conditions offer an opportunity to study the influence of the environment on intraspecific genetic variation. For this, we combined an analysis of neutral genetic markers with a phenotypic evaluation in common-garden experiments, and environmental characterization of populations that included climatic and edaphic parameters, as well as geographic distribution. A Bayesian clustering of individuals from nine representative populations based on amplified fragment length polymorphism (AFLP) divided the populations into a southern and a northern geographic cluster, with one admixed population at the geographic border between them. Linear mixed models, with cluster added as a grouping factor, revealed no clear effects of environment or geography on genetic distances, but this may be due to a strong association of geography and environment with genetic clusters. However, environmental factors accounted for part of the phenotypic variation observed in the common-garden experiments. In addition, candidate loci for selection were identified by association with environmental parameters and by two outlier methods. One locus, identified by all three methods, also showed an association with trichome density and herbivore damage, in net-house and field experiments, respectively. Accordingly, we propose that because trichomes are directly linked to defense against both herbivores and excess radiation, they could potentially be related to adaptive variation in these populations. These results demonstrate the value of combining environmental and phenotypic data with a detailed genetic survey when studying adaptation in plant populations. © 2013 The Authors.
Scientific Publication
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