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首页> 外文期刊>AoB PLANTS >Pollinator-mediated selection on floral traits varies in space and between morphs in Primula secundiflora
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Pollinator-mediated selection on floral traits varies in space and between morphs in Primula secundiflora

机译：传粉媒介介导的花性状选择在空间上和报春花报春花的形态之间变化

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Elucidating how variation in selection shapes the evolution of flowers is key to understanding adaptive differentiation processes. We estimated pollinator-mediated selection through female function in L-morph (long-style and short-anther phenotype) and S-morph (short-style and long-anther phenotype) flowers among four Primula secundiflora populations with different pollinator assemblages. Variation in pollinator assemblage strongly contributed to differences in reproductive success among populations and between morphs of the primrose species. A wider corolla tube width was selected in the bumblebee-dominated populations, whereas shorter corolla tube length and wider corolla tube width were selected in the syrphid fly-dominated populations. Morph-specific variation in pollinator-mediated selection on corolla tube length was detected in the syrphid fly-dominated populations. A shorter corolla tube was selected in the L-morph flowers. However, similar selective pressure on this trait was not observed in the S-morph flowers. These results show that variation in pollinator assemblage leads to variation in selection in space and between morphs. The findings highlight the potential forces of different pollinator agents in driving floral evolution in this primrose species.
机译：阐明选择差异如何影响花朵的进化是理解适应性分化过程的关键。我们估计了通过授粉媒介介导的选择，通过四个授粉组合不同的报春花种群中L型（长型和短花药表型）和S型（短型和长花药表型）花的雌性功能介导。传粉媒介组合的变化极大地促进了种群之间以及报春花物种的形态之间生殖成功的差异。在以大黄蜂为主的种群中选择了较宽的花冠管宽度，而在以苍蝇为食的苍蝇种群中选择了较短的花冠管长度和较宽的花冠管宽度。在花粉虱以蝇为主导的种群中，在花粉管长度上的授粉媒介介导的选择中发生了形态特异性变化。在L型花中选择了较短的花冠管。然而，在S型花中未观察到对该性状的类似选择压力。这些结果表明，传粉媒介组合的变化导致空间和形态之间选择的变化。这些发现凸显了不同授粉媒介在该报春花物种中推动花卉进化的潜在作用力。

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