Arid
DOI10.1002/ece3.646
Environmental effects on molecular and phenotypic variation in populations of Eruca sativa across a steep climatic gradient
Westberg, Erik1,2,3; Ohali, Shachar1; Shevelevich, Anatoly1,4; Fine, Pinchas5; Barazani, Oz1
通讯作者Barazani, Oz
来源期刊ECOLOGY AND EVOLUTION
ISSN2045-7758
出版年2013
卷号3期号:8页码:2471-2484
英文摘要

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.


英文关键词Environmental adaptation Eruca sativa genetic diversity outlier loci phenotypic variation
类型Article
语种英语
国家Israel ; Germany
收录类别SCI-E
WOS记录号WOS:000323200800007
WOS关键词HORDEUM-SPONTANEUM KOCH ; GENE FLOW ; MEDITERRANEAN POPULATIONS ; NATURAL-POPULATIONS ; ARIDITY GRADIENT ; ECOTYPIC DIFFERENTIATION ; WATER-STRESS ; GENOME-SCAN ; WILD BARLEY ; PLANT
WOS类目Ecology ; Evolutionary Biology
WOS研究方向Environmental Sciences & Ecology ; Evolutionary Biology
来源机构Hebrew University of Jerusalem
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/176757
作者单位1.Agr Res Org, Inst Plant Sci, Israel Plant Gene Bank, IL-50250 Bet Dagan, Israel;
2.Johannes Gutenberg Univ Mainz, Inst Spezielle Bot, D-55099 Mainz, Germany;
3.Johannes Gutenberg Univ Mainz, Bot Garten, D-55099 Mainz, Germany;
4.Hebrew Univ Jerusalem, Robert H Smith Inst Plant Sci & Genet Agr, Robert H Smith Fac Agr Food & Environm, IL-76100 Rehovot, Israel;
5.Agr Res Org, Inst Soil Water & Environm Sci, Dept Soil Chem Plant Nutr & Microbiol, IL-50250 Bet Dagan, Israel
推荐引用方式
GB/T 7714
Westberg, Erik,Ohali, Shachar,Shevelevich, Anatoly,et al. Environmental effects on molecular and phenotypic variation in populations of Eruca sativa across a steep climatic gradient[J]. Hebrew University of Jerusalem,2013,3(8):2471-2484.
APA Westberg, Erik,Ohali, Shachar,Shevelevich, Anatoly,Fine, Pinchas,&Barazani, Oz.(2013).Environmental effects on molecular and phenotypic variation in populations of Eruca sativa across a steep climatic gradient.ECOLOGY AND EVOLUTION,3(8),2471-2484.
MLA Westberg, Erik,et al."Environmental effects on molecular and phenotypic variation in populations of Eruca sativa across a steep climatic gradient".ECOLOGY AND EVOLUTION 3.8(2013):2471-2484.
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