Plant domestication: a model for studying the selection of linkage

被引:36
作者
D'Ennequin, ML
Toupance, B
Robert, T
Godelle, B
Gouyon, PH
机构
[1] Univ Paris 11, CNRS, UPRESA 8079, Lab Evolut & Systemat, F-91405 Orsay, France
[2] INAPG, F-75231 Paris 05, France
关键词
Batesian mimicry; cereals; gene flow; reproductive system; supergene;
D O I
10.1046/j.1420-9101.1999.00115.x
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
The profess of domestication leads to acquisition of traits that are often similar between plant species that belong to the same family but have different breeding systems. Hence domestication is a useful model for studying evolutionary responses to selection in plants with contrasting breeding systems. We consider a stochastic model simulating gene now between a natural population and an initial population containing mutants with domesticated phenotypes at low frequency. We assume that a large number of loci contribute equally to the cultivated phenotype. Our results indicate that the number of loci for which the mutant ('domestication') allele is maintained is larger in autogamous plants than in allogamous ones and that domestication can lead to the selection of tightly linked combinations of genes in allogamous plants. This work provides a general model for the selection of gene clusters through a sieve effect and it is discussed in comparison with models proposed to explain the evolution of linkage of genes determining wing patterns in butterflies exhibiting Batesian mimicry.
引用
收藏
页码:1138 / 1147
页数:10
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