Interactions between the Bumblebee Bombus pascuorum and Red Clover (Trifolium pratense) Are Mediated by Plant Genetic Background.
Interactions between the Bumblebee Bombus pascuorum and Red Clover (Trifolium pratense) Are Mediated by Plant Genetic Background.
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DOI：
10.1371/journal.pone.0161327
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Rowntree JK
中科院分区：
文献类型：
--
作者：
Sands RJ;Rowntree JK
野花混合物通常种植在田地边缘，为授粉者提供饲料。尽管这些混合物的种子通常是野生来源的，但对于可获得农业栽培品种的物种，例如红三叶草（Trifolium pratense），也可包括栽培品种。先前的证据表明，植物遗传背景可以对植物-节肢动物相互作用产生强烈影响，因此野花混合物中包含的植物的种源和遗传背景可以影响植物-传粉者相互作用。我们测试了五个单独的T。pratense品种对两个商业上可获得的野生来源的T.利用温室和花园实验，研究了草地种群吸引潜在传粉者物种（重点是熊蜂）的能力及其花特征。观察到的主要熊蜂与T. Pratense为熊蜂（Bombus pascuorum），B的绝对数量无差异。pascuorum访问栽培品种或野生种群。然而，我们发现品种之间的变化和野生种群之间的吸引熊蜂的能力，这似乎是与他们的相对投资不同的花性状。野生居群的生物量与花序数呈正相关。Pratense，这是不明显的品种。这表明，对品种的人工选择改变了相关性状的G矩阵。结果表明，T. Pratense在吸引传粉者如熊蜂方面可以与野生种群一样有效，但是栽培品种和野生种群的遗传背景都可以对植物对传粉者的吸引力产生重大影响。我们还显示了T.如果植物杂交，可能导致远交衰退的草地栽培品种和野生种群。
Wildflower mixes are often planted around field margins to provide forage for pollinators. Although seed for these mixtures is often wild-sourced, for species where agricultural cultivars are available, for example red clover (Trifolium pratense), cultivars can also be included. Previous evidence suggests that plant genetic background can have a strong influence on plant-arthropod interactions and therefore the provenance and genetic background of the plants included in wildflower mixes could impact plant-pollinator interactions. We tested the performance of five individual T. pratense cultivars against two commercially available wild-sourced T. pratense populations in terms of their ability to attract potential pollinator species (focusing on bumblebees) and their floral traits using greenhouse and garden experiments. The main bumblebee observed interacting with T. pratense was Bombus pascuorum and we found no difference in the absolute number of B. pascuorum visiting the cultivars or wild populations. However, we found variation among cultivars and between wild populations in their ability to attract bumblebees, which seems to be related to their relative investment in different floral traits. There was a positive relationship between biomass and number of inflorescences produced by the wild populations of T. pratense, which was not apparent for the cultivars. This suggests that artificial selection on the cultivars has changed the G-matrix of correlated traits. We show that agricultural cultivars of T. pratense can be as effective as wild populations at attracting pollinators such as bumblebees, but that the genetic background of both cultivars and wild populations can have a significant impact on the attractiveness of the plant to pollinators. We also show divergence in the correlated traits of T. pratense cultivars and wild populations that could lead to outbreeding depression if the plants interbreed.