Space-time patterns of genetic structure within a stand of Androcymbium gramineum (Cav.) McBride (Colchicaceae)

被引：20

作者：

CaujapeCastells, J ^{[1
]}

PedrolaMonfort, J ^{[1
]}

机构：

[1] ESTACIO INT BIOL MEDITERRANIA, JARDI BOT MARIMURTRA, BLANES 17300, GIRONA, SPAIN

来源：

HEREDITY | 1997年 / 79卷 / 4期

关键词：

allozymes; Androcymbium; genetic structure; population growth; spatial autocorrelation; vegetative reproduction;

D O I：

10.1038/hdy.1997.166

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Space-time patterns of genetic structure in the largest known Spanish stand of Androcymbium gramineum were explored through spatial autocorrelation on allele frequencies at 17 allozymic loci. Our results strongly suggest that the consistent overall profiles of short-distance genetic structure detected have evolved in a scenario of prolonged habitat uniformity by the action of prolific vegetative reproduction overlaid with a minor incidence of outcrossing and self-fertilization. Investigation of the temporal component of spatial genetic structure through the assessment of differently aged cohorts of plants provided evidence that patch sizes in this stand are progressively enlarged in the absence of microhabitat differentiation. These results explain the maintenance of large amounts of variability in this endangered endemic species.

引用

页码：341 / 349

页数：9

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