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Cytotype coexistence in the field cannot be explained by inter-cytotype hybridization alone: linking experiments and computer simulations in the sexual species Pilosella echioides (Asteraceae)

机译:不能仅通过细胞间杂交来解释该领域中细胞型的共存:有性种Piechella echioides(菊科)的链接实验和计算机模拟

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摘要

BackgroundProcesses driving ploidal diversity at the population level are virtually unknown. Their identification should use a combination of large-scale screening of ploidy levels in the field, pairwise crossing experiments and mathematical modelling linking these two types of data. We applied this approach to determine the drivers of frequencies of coexisting cytotypes in mixed-ploidy field populations of the fully sexual plant species Pilosella echioides. We examined fecundity and ploidal diversity in seeds from all possible pairwise crosses among 2x, 3x and 4x plants. Using these data, we simulated the dynamics of theoretical panmictic populations of individuals whose progeny structure is identical to that determined by the hybridization experiment.
机译:背景技术在人口水平上驱动倍性多样性的过程实际上是未知的。他们的鉴定应结合在现场对倍性水平的大规模筛选,成对杂交实验和链接这两种数据的数学建模相结合。我们应用这种方法来确定完全有性植物种Pilosella echioides的混合倍性田间种群中共存细胞型频率的驱动因素。我们检查了2x,3x和4x植物之间所有可能的成对杂交的种子的繁殖力和倍性多样性。利用这些数据,我们模拟了其后代结构与杂交实验确定的个体相同的理论恐慌种群的动态。

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