Direct and indirect selection on flowering time, water-use efficiency (WUE, δ (13)C), and WUE plasticity to drought in Arabidopsis thaliana.
Direct and indirect selection on flowering time, water-use efficiency (WUE, δ (13)C), and WUE plasticity to drought in Arabidopsis thaliana.
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DOI：
10.1002/ece3.1270
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发表时间：
2014-12
影响因子：
2.6
通讯作者：
Juenger TE
中科院分区：
文献类型：
--
作者：
Kenney AM;McKay JK;Richards JH;Juenger TE
开花时间和水分利用效率（WUE）是植物干旱响应的两个重要生态性状。为了了解拟南芥开花时间、WUE以及WUE对干旱的可塑性等自然遗传变异的进化意义，我们解决了以下问题：（1）不同土壤水分环境内和之间的生理生态性状如何遗传相关？(2)末期干旱选择早花和逃避干旱吗？(3)WUE对干旱的可塑性是适应性的还是代价高昂的？我们测量了一套生态生理和繁殖性状的234个春季开花的拟南芥加入生长在良好的浇水和季节结束的土壤干燥处理，并量化的遗传变异，相关性和选择模式在每个处理。WUE和开花时间始终呈遗传正相关。水分利用效率与水分利用效率的可塑性相关，但方向不同。选择一般有利于早开花和低WUE，干旱有利于早开花显着超过良好的浇水条件。选择较低的WUE是略强干旱。WUE可塑性没有净适应性成本。WUE可塑性（本身）是全球中性的，但在干旱的地方青睐。WUE与开花时间之间的强遗传相关可能促进干旱逃逸的进化，或限制这些性状的独立进化。末期干旱有利于这些春开花的A。thaliana.在周期性干旱的环境中，WUE的可塑性可能比完全固定的发育更有利。
Flowering time and water-use efficiency (WUE) are two ecological traits that are important for plant drought response. To understand the evolutionary significance of natural genetic variation in flowering time, WUE, and WUE plasticity to drought in Arabidopsis thaliana, we addressed the following questions: (1) How are ecophysiological traits genetically correlated within and between different soil moisture environments? (2) Does terminal drought select for early flowering and drought escape? (3) Is WUE plasticity to drought adaptive and/or costly? We measured a suite of ecophysiological and reproductive traits on 234 spring flowering accessions of A. thaliana grown in well-watered and season-ending soil drying treatments, and quantified patterns of genetic variation, correlation, and selection within each treatment. WUE and flowering time were consistently positively genetically correlated. WUE was correlated with WUE plasticity, but the direction changed between treatments. Selection generally favored early flowering and low WUE, with drought favoring earlier flowering significantly more than well-watered conditions. Selection for lower WUE was marginally stronger under drought. There were no net fitness costs of WUE plasticity. WUE plasticity (per se) was globally neutral, but locally favored under drought. Strong genetic correlation between WUE and flowering time may facilitate the evolution of drought escape, or constrain independent evolution of these traits. Terminal drought favored drought escape in these spring flowering accessions of A. thaliana. WUE plasticity may be favored over completely fixed development in environments with periodic drought.
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影响因子：
10.1
作者：
Keesing, F
通讯作者：
Keesing, F
影响因子：
56.9
作者：
BOYER, JS
通讯作者：
BOYER, JS
影响因子：
3.3
作者：
Angert, AL;Schemske, DW
通讯作者：
Schemske, DW
影响因子：
3.3
作者：
Caruso, Christina M.;Maherali, Hafiz;Sherrard, Mark
通讯作者：
Sherrard, Mark
拟南芥中全基因组的关联映射确定了先前已知的开花时间和病原体抗性基因。
影响因子：
4.5
作者：
Aranzana MJ;Kim S;Zhao K;Bakker E;Horton M;Jakob K;Lister C;Molitor J;Shindo C;Tang C;Toomajian C;Traw B;Zheng H;Bergelson J;Dean C;Marjoram P;Nordborg M
通讯作者：
Nordborg M