Real-time patterns of pollen flow in the wild-service tree, Sorbus torminalis (Rosaceae). III. Mating patterns and the ecological maternal neighborhood.
Real-time patterns of pollen flow in the wild-service tree, Sorbus torminalis (Rosaceae). III. Mating patterns and the ecological maternal neighborhood.
复制标题
野生花楸树（蔷薇科）花粉流的实时模式。
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
F. Austerlitz
中科院分区：
文献类型：
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作者：
S. Oddou‐Muratorio;E. Klein;Brigitte Demesure;F. Austerlitz
了解母株作为花粉接受者在形成交配模式中的作用对于理解种群的进化，特别是预测栖息地破碎化的后果是至关重要的。在这里，我们调查了交配模式的变化，由于母亲的表型性状，物候变异，和景观特征，花楸，雌雄同体，昆虫授粉和低密度，欧洲温带森林树木。本文研究了南秦岭地区母树花粉云的多样性和组成。torminalis主要是由他们的同种邻居：孤立的个人样本更多的多样性，通过更均匀的父亲的贡献，低相关性的父亲基因，和高比率的远距离花粉传播在他们的后代。与传粉者吸引力相关的母体表型性状也有影响，但只有在竞争激烈的情况下：在这种情况下，具有更多花朵的较大母树采样更多多样性。S. torminalis，多种子果实，强烈的形状交配模式，具有较高的水平，属于同一个水果的种子（30%全同胞）比种子属于不同的水果（14%全同胞）之间的相关亲子关系。最后，开花物候影响母体花粉云的多样性分布，但最早和最晚的母树并没有收到比其他少的花粉多样性。
Understanding the role of mother plants as pollen recipients in shaping mating patterns is essential for understanding the evolution of populations and in particular to predict the consequence of habitat fragmentation. Here, we investigated variation in mating patterns due to maternal phenotypic traits, phenological variance, and landscape features in Sorbus torminalis, a hermaphroditic, insect-pollinated and low-density, European temperate forest tree. The diversity and composition of pollen clouds received by maternal trees in S. torminalis were mainly determined by their conspecific neighborhood: isolated individuals sample more diversity through more even paternal contributions, low relatedness among paternal genes, and high rates of long-distance pollen dispersal within their progenies. Maternal phenotypic traits related to pollinator attractiveness also had an effect, but only when competition was strong: in this case, larger mother trees with more flowers sampled more diversity. The floral architecture of S. torminalis, with multiple-seeded fruit, strongly shaped mating patterns, with higher levels of correlated paternity among seeds belonging to the same fruit (30% full sibs) than among seeds belonging to different fruits (14% full sibs). Finally, flowering phenology affected the distribution of diversity among maternal pollen clouds, but the earliest and latest mother trees did not receive less diversity of pollen than the others.