Genome size variation in wild and cultivated maize along altitudinal gradients.
Genome size variation in wild and cultivated maize along altitudinal gradients.
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DOI：
10.1111/nph.12247
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发表时间：
2013-07
期刊：
影响因子：
--
通讯作者：
Tenaillon MI
中科院分区：
文献类型：
--
作者：
Díez CM;Gaut BS;Meca E;Scheinvar E;Montes-Hernandez S;Eguiarte LE;Tenaillon MI
基因组大小（GS）变异是否是由自然选择形成的，这仍然是一个悬而未决的问题。解决这个问题的一种方法是人口水平的调查，评估GS的变化和GS的生态变异的关系。·我们评估了玉米中的GS，玉米是一种包括栽培作物玉米及其最接近的野生亲戚大刍草的物种。我们测量GS在5个植物的22个玉米地方品种和21个玉米种群从墨西哥平行的海拔梯度采样。·地方品种的GS显著小于大刍草，但GS变异的最大成分是地方品种和居群之间。在玉米中，GS与海拔高度呈负相关;更普遍的是，最好的GS预测因子与地理位置有关。与此相反，GS的变化在大刍草是最好的解释温度和降水。总的来说，我们的研究结果进一步证明了玉米基因组的大小灵活性，但也指出了自驯化以来GS变异模式的急剧变化。我们认为，这样的模式可能反映了选择GS的间接作用，通过多样性的表型和生活史性状。
• It is still an open question as to whether genome size (GS) variation is shaped by natural selection. One approach to address this question is a population-level survey that assesses both the variation in GS and the relationship of GS to ecological variants. • We assessed GS in Zea mays, a species that includes the cultivated crop, maize, and its closest wild relatives, the teosintes. We measured GS in five plants of each of 22 maize landraces and 21 teosinte populations from Mexico sampled from parallel altitudinal gradients. • GS was significantly smaller in landraces than in teosintes, but the largest component of GS variation was among landraces and among populations. In maize, GS correlated negatively with altitude; more generally, the best GS predictors were linked to geography. By contrast, GS variation in teosintes was best explained by temperature and precipitation. • Overall, our results further document the size flexibility of the Zea genome, but also point to a drastic shift in patterns of GS variation since domestication. We argue that such patterns may reflect the indirect action of selection on GS, through a multiplicity of phenotypes and life-history traits.
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DOI：
10.1073/pnas.052125199
发表时间：
2002-04-30
影响因子：
11.1
作者：
Matsuoka, Y;Vigouroux, Y;Doebley, J
通讯作者：
Doebley, J
影响因子：
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影响因子：
30.8
作者：
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通讯作者：
Ware, Doreen
DOI：
10.1073/pnas.95.18.10785
发表时间：
1998-09-01
影响因子：
11.1
作者：
Ananiev, EV;Phillips, RL;Rines, HW
通讯作者：
Rines, HW
影响因子：
3.7
作者：
Hufford MM;Richardson G;Zhou H;Manicassamy B;García-Sastre A;Enelow RI;Braciale TJ
通讯作者：
Braciale TJ