Reaction norm variation between and within populations of two rare plant species, Vicia pisiformis and V. dumetorum (Fabaceae)

被引：12

作者：

Black-Samuelsson S. ^{[1
]}

Andersson S. ^{[2
]}

机构：

[1] Department of Forest Genetics, Swed. Univ. of Agricultural Sciences, S-750 07 Uppsala

[2] Department of Systematic Botany, University of Lund, S-223 61 Lund

来源：

Heredity | 1997年 / 79卷 / 3期

关键词：

Genetic variation; Genotype x environment interaction; Phenotypic plasticity; Rarity; Vicia dumetorum; Vicia pisiformis;

D O I：

10.1038/hdy.1997.154

中图分类号：

学科分类号：

摘要：

A split-family design with progenies grown across a steep temperature gradient was used to examine the patterns of reaction norm variation in two locally rare, thermophilous plant species, Vicia pisiformis and V. dumetorum. We predicted (i) a negative association between the amount of genetic variation and the magnitude of response across temperatures; (ii) broader ecological tolerance and higher levels of genetic variation for reaction norm parameters in the broadly adapted V. dumetorum than in the ecologically restricted V. pisiformis; and (iii) higher performance across environments for central populations than for geographically marginal populations. Patterns of variation in 10 vegetative characters, including measures of overall plant size, provided no evidence of a trade-off between plasticity and genetic variation. Our data indicate greater performance across temperatures and more divergent genotypes in V. dumetorum than in V. pisiformis. Central populations of V. pisiformis performed better than conspecific populations from the marginal (northern) regions.

引用

页码：268 / 276

页数：8

共 29 条

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