Quantitative genetics of response to competitors in Nemophila menziesii: a field experiment.
Quantitative genetics of response to competitors in Nemophila menziesii: a field experiment.
复制标题
Nemophila menziesii 对竞争者反应的定量遗传学：田间实验。
作者：
R. G. Shaw;G. A. Platenkamp;F. Shaw;Robert H. Podolsky
最近对异质环境中进化的研究已经开始适应自然种群典型的遗传和环境复杂性。理论研究表明，多基因性状的进化在很大程度上依赖于发生选择的不同环境中性状表达的遗传相关性，但有关这一问题的信息很少。我们进行了一项田间试验，以评估一年生植物曼氏根结线虫在五种不同密度和组成的生物条件下的遗传变异性。植株大小的显著加性遗传差异虽然不大，但在特定的处理中表现出来。在种间和种内竞争性能之间发现了加性遗传权衡的证据，但这一结果在整个实验中并不一致。在以前发表的许多实验中，实验设计的两个方面可能会掩盖基于遗传的跨环境权衡：(1)无法从其他变异来源中分离出加性基因；(2)使用新的(如实验室)环境。
Recent investigations of evolution in heterogeneous environments have begun to accommodate genetic and environmental complexity typical of natural populations. Theoretical studies demonstrate that evolution of polygenic characters depends heavily on the genetic interdependence of the expression of traits in the different environments in which selection occurs, but information concerning this issue is scarce. We conducted a field experiment to assess the genetic variability of the annual plant Nemophila menziesii in five biotic regimes differing in plant density and composition. Significant, though modest, additive genetic variance in plant size was expressed in particular treatments. Evidence of additive genetic tradeoffs between interspecific and intraspecific competitive performance was found, but this result was not consistent throughout the experiment. Two aspects of experimental design may tend to obscure genetically based tradeoffs across environments in many previously published experiments: (1) inability to isolate additive genetic from other sources of variation and (2) use of novel (e.g., laboratory) environments.
影响因子：
1.5
作者：
LANDE, R;KIRKPATRICK, M
通讯作者：
KIRKPATRICK, M
空间异质环境中遗传变异的演化：基因型-环境相互作用的影响。
DOI：
10.1017/s001667230002694x
发表时间：
1987
期刊：
Genetical research
影响因子：
--
作者：
Via,S;Lande,R
通讯作者：
Lande,R