Life-history QTLS and natural selection on flowering time in Boechera stricta, a perennial relative of Arabidopsis.
Life-history QTLS and natural selection on flowering time in Boechera stricta, a perennial relative of Arabidopsis.
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DOI：
10.1111/j.1558-5646.2010.01175.x
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发表时间：
2011-03
期刊：
影响因子：
--
通讯作者：
Mitchell-Olds T
中科院分区：
文献类型：
--
作者：
Anderson JT;Lee CR;Mitchell-Olds T
植物必须准确地确定开花的时间，才能利用有利的条件。尽管我们对控制条件下模式物种开花物候的遗传基础了解很多，但在非模式生物中，这一生态重要特征的遗传结构却知之甚少。在此，我们评估了拟南芥的多年生近亲--狭叶羊茅从营养生长到开花的转变。我们利用7,920个重组自交系个体，在7个春化、温度和光周期不同的实验室和田间环境中检测了开花时间QTL。遗传和环境因素强烈地影响了向生殖的过渡。我们发现了田间开花较早的定向选择。在生长室实验中，较长的冬季加速了开花，而环境温度升高则推迟了开花。我们的分析发现了一个大效应QTL(NFT)，它影响了两个试验的开花时间和田间开花概率。在蒙大拿州，NFT的天然等位基因纯合子显示出6.6%的选择优势。然而，我们发现田间开花时间和生长室之间的相关性相对较低。此外，我们在田间检测到与开花相关的QTL，这些QTL在所有实验室条件下都不存在，因此强调了在自然环境中进行实验的必要性。
Plants must precisely time flowering to capitalize on favorable conditions. Although we know a great deal about the genetic basis of flowering phenology in model species under controlled conditions, the genetic architecture of this ecologically-important trait is poorly understood in non-model organisms. Here, we evaluated the transition from vegetative growth to flowering in Boechera stricta, a perennial relative of Arabidopsis thaliana. We examined flowering time QTLs using 7,920 recombinant inbred individuals, across seven lab and field environments differing in vernalization, temperature, and photoperiod. Genetic and environmental factors strongly influenced the transition to reproduction. We found directional selection for earlier flowering in the field. In the growth chamber experiment, longer winters accelerated flowering, whereas elevated ambient temperatures delayed flowering. Our analyses identified one large effect QTL (nFT), which influenced flowering time in both experiments and the probability of flowering in the field. In Montana, homozygotes for the native allele at nFT showed a selective advantage of 6.6%. Nevertheless, we found relatively low correlations between flowering times in the field and the growth chambers. Additionally, we detected flowering-related QTLs in the field which were absent across the full range of laboratory conditions, thus emphasizing the need to conduct experiments in natural environments.
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影响因子：
11.6
作者：
Hayama, Ryosuke;Agashe, Bhavna;Coupland, George
通讯作者：
Coupland, George
DOI：
10.1016/j.cub.2010.01.059
发表时间：
2010-04-13
期刊：
Current biology : CB
影响因子：
--
作者：
Blackman BK;Strasburg JL;Raduski AR;Michaels SD;Rieseberg LH
通讯作者：
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影响因子：
3.8
作者：
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通讯作者：
KNOTT, SA
影响因子：
3.3
作者：
Hall, MC;Basten, CJ;Willis, JH
通讯作者：
Willis, JH
影响因子：
56.9
作者：
Böhlenius, H;Huang, T;Nilsson, O
通讯作者：
Nilsson, O