Gene flow between wheat and wild relatives: empirical evidence from Aegilops geniculata, Ae. neglecta and Ae. triuncialis

被引：34

作者：

Arrigo, Nils ^{[1
]}

Guadagnuolo, Roberto ^{[1
]}

Lappe, Sylvain ^{[1
]}

Pasche, Sophie ^{[1
]}

Parisod, Christian ^{[1
]}

Felber, Francois ^{[1
]}

机构：

[1] Univ Neuchatel, Lab Evolutionary Bot, Inst Biol, CH-2000 Neuchatel, Switzerland

来源：

EVOLUTIONARY APPLICATIONS | 2011年 / 4卷 / 05期

基金：

瑞士国家科学基金会;

关键词：

admixture; amplified fragment length polymorphism; crop-to-wild gene flow; introgression; transposable element-based markers; TRITICUM-AESTIVUM L; B-GENOME; POPULATION-STRUCTURE; FIELD CONDITIONS; A-GENOME; AFLP; INTROGRESSION; HYBRIDIZATION; DNA; DIVERSITY;

D O I：

10.1111/j.1752-4571.2011.00191.x

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Gene flow between domesticated species and their wild relatives is receiving growing attention. This study addressed introgression between wheat and natural populations of its wild relatives (Aegilops species). The sampling included 472 individuals, collected from 32 Mediterranean populations of three widespread Aegilops species (Aegilops geniculata, Ae. neglecta and Ae. triuncialis) and compared wheat field borders to areas isolated from agriculture. Individuals were characterized with amplified fragment length polymorphism fingerprinting, analysed through two computational approaches (i.e. Bayesian estimations of admixture and fuzzy clustering), and sequences marking wheat-specific insertions of transposable elements. With this combined approach, we detected substantial gene flow between wheat and Aegilops species. Specifically, Ae. neglecta and Ae. triuncialis showed significantly more admixed individuals close to wheat fields than in locations isolated from agriculture. In contrast, little evidence of gene flow was found in Ae. geniculata. Our results indicated that reproductive barriers have been regularly bypassed during the long history of sympatry between wheat and Aegilops.

引用

页码：685 / 695

页数：11

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