Uniparental reproduction has often been regarded as advantageous for colonization. In pseudogamous apomicts, reproduction via single individuals requires self‐pollination and consequently self‐compatibility (SC) for production of viable seeds. SC and reproductive fitness have been studied in diploid and polyploid taxa of the Ranunculus auricomus complex via pollinator exclusion tests, assessment of seed set, and germination rates. Reproductive fitness of sexuals exceeds that of apomicts and of F1 hybrids but may fluctuate more strongly between years than is the case in apomicts. Diploid sexual taxa and also their F1 hybrids are completely self‐incompatible (SI). Autopolyploid sexual cytotypes are also predominantly SI, which may have restricted their range expansion. The observed breakdown of SI in the rather widespread allohexaploid apomicts may be explained by initial partial SC inherited from semi‐self‐compatible ancestors and strong selection for SC genotypes. It is concluded that higher reproductive fitness of sexuals may help to maintain sexual populations when cross‐pollination is available, whereas SC in apomicts may be advantageous in temporally and spatially unstable environments and also for colonization events. Results suggest that SC in connection with pseudogamous apomixis is an important factor for the observed distribution pattern of geographical parthenogenesis.

中文翻译：

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无融合生殖毛茛多倍体复合体（毛茛科）中自交和繁殖适应性的进化意义

单亲繁殖通常被认为有利于殖民。在假配偶无融合生殖中，通过单个个体进行繁殖需要自花授粉，因此需要自交亲和性 (SC) 来生产有活力的种子。已经通过传粉媒介排除试验、种子集评估和发芽率在毛茛复合体的二倍体和多倍体分类群中研究了 SC 和生殖适应性。有性生殖适合性超过无融合生殖和 F1 杂种，但可能比无融合生殖的情况在年份之间波动更大。二倍体有性分类群及其 F1 杂种是完全自交不相容 (SI)。同源多倍体有性细胞型也主要是 SI，这可能限制了它们的范围扩展。在相当广泛的异源六倍体无融合生殖体中观察到的 SI 分解可能是由于从半自交祖先继承的初始部分 SC 和对 SC 基因型的强烈选择。得出的结论是，当异花授粉可用时，有性生殖的较高生殖健康可能有助于维持有性种群，而无融合生殖中的 SC 可能在时间和空间不稳定的环境中以及殖民事件中有利。结果表明，与假配性无融合生殖相关的 SC 是观察到的地理孤雌生殖分布模式的重要因素。得出的结论是，当异花授粉可用时，有性生殖的较高生殖健康可能有助于维持有性种群，而无融合生殖中的 SC 可能在时间和空间不稳定的环境中以及殖民事件中有利。结果表明，与假配性无融合生殖相关的 SC 是观察到的地理孤雌生殖分布模式的重要因素。得出的结论是，当异花授粉可用时，有性生殖的较高生殖健康可能有助于维持有性种群，而无融合生殖中的 SC 可能在时间和空间不稳定的环境中以及殖民事件中有利。结果表明，与假配性无融合生殖相关的 SC 是观察到的地理孤雌生殖分布模式的重要因素。