Data from: High correlated paternity leads to negative effects on progeny performance in two mediterranean shrub species

Anthropogenic habitat deterioration can promote changes in plant mating systems that subsequently may affect progeny performance, thereby conditioning plant recruitment for the next generation. However, very few studies yet tested mating system parameters other than outcrossing rates; and the direct effects of the genetic diversity of the pollen received by maternal plants (i.e. correlated paternity) has often been overlooked. In this study, we investigated the relation between correlated paternity and progeny performance in two common Mediterranean shrubs, Myrtus communis and Pistacia lentiscus. To do so, we collected open-pollinated progeny from selected maternal plants, calculated mating system parameters using microsatellite genotyping and conducted sowing experiments under greenhouse and field conditions. Our results showed that some progeny fitness components were negatively affected by the high correlated paternity of maternal plants. In Myrtus communis, high correlated paternity had a negative effect on the proportion and timing of seedling emergence in the natural field conditions and in the greenhouse sowing experiment, respectively. In Pistacia lentiscus, seedling emergence time under field conditions was also negatively influenced by high correlated paternity and a progeny survival analysis in the field experiment showed greater mortality of seedlings from maternal plants with high correlated paternity. Overall, we found effects of correlated paternity on the progeny performance of Myrtus communis, a self-compatible species. Further, we also detected effects of correlated paternity on the progeny emergence time and survival in Pistacia lentiscus, an obligate outcrossed species. This study represents one of the few existing empirical examples which highlight the influence that correlated paternity may exert on progeny performance in multiple stages during early seedling growth.人为生境退化可推动植物交配系统发生改变，进而对子代表现产生影响，最终调控下一代植物的更新过程。然而，目前仅有极少研究检验了除异交率（outcrossing rates）之外的交配系统参数；且母本植株接收的花粉遗传多样性（即父本相关性（correlated paternity））的直接效应常被忽视。本研究以两种常见的地中海灌木——香桃木（Myrtus communis）与乳香黄连木（Pistacia lentiscus）为研究对象，探究父本相关性与子代表现之间的关联。为此，我们从选定的母本植株上采集自由授粉子代，通过微卫星基因分型（microsatellite genotyping）计算交配系统参数，并在温室与田间条件下开展播种实验。研究结果表明，母本较高的父本相关性会对部分子代适合度组分产生负面影响。就香桃木而言，较高的父本相关性分别对自然田间条件下的幼苗出土比例，以及温室播种实验中的幼苗出土时间产生了负向影响。在乳香黄连木中，田间条件下的幼苗出土时间同样会因较高的父本相关性而受到负面影响；此外，田间实验的子代存活分析显示，来自高父本相关性母本的幼苗死亡率更高。整体而言，我们发现父本相关性对自交亲和物种（self-compatible species）香桃木的子代表现存在调控作用。此外，我们还检测到父本相关性对专性异交物种（obligate outcrossed species）乳香黄连木的子代出苗时间与存活亦存在影响。本研究是现有少数实证案例之一，阐明了父本相关性在幼苗早期生长的多个阶段对子代表现可能产生的调控作用。