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Effects of crossing distance on fitness components in the carnivorous plant Pinguicula moranensis (Lentibulariaceae)
Plant Species Biology ( IF 1.1 ) Pub Date : 2020-04-17 , DOI: 10.1111/1442-1984.12271 Villegas Sara Gabriela 1 , Ospina‐Garcés Sandra Milena 2 , Fornoni Juan 3 , Domínguez César Augusto 3 , Alcalá Raúl Ernesto 1
Plant Species Biology ( IF 1.1 ) Pub Date : 2020-04-17 , DOI: 10.1111/1442-1984.12271 Villegas Sara Gabriela 1 , Ospina‐Garcés Sandra Milena 2 , Fornoni Juan 3 , Domínguez César Augusto 3 , Alcalá Raúl Ernesto 1
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Plant species vary in the pollination distance at which negative fitness effects are expressed, and it has been proposed that optimal mating should occur at a distance large enough to diminish the risks of inbreeding, but short enough to prevent outbreeding depression. In a natural population of Pinguicula moranensis we assessed the fitness of plants (seeds per fruit) and their progeny (germination and seedling survival) as a function of pollination distance by hand‐pollinating with donors from five distances: 0 m (self‐fertilization), 1, 4 and 460 m (within‐population) and 9,900 m (between‐population) under in situ and ex situ conditions. We found that average values for fitness components were consistently lower in the in situ experiment than in the ex situ experiment. Under both conditions, the self‐fertilization treatment had the lowest values. Inbreeding depression values were high (0.94 to 0.98), corresponding with the values expected for an outcrossing species subjected to self‐fertilization. Overall, no evidence of outbreeding depression was detected. Considering that our experiment was restricted to one single donor population and one recipient population, our results indicate that despite the within‐population patchy distribution of individuals, biparental inbreeding could occur at low rates, due in part to short seed dispersal distance. However, pollen movement of at least 1 m is apparently sufficient to reverse negative effects.
中文翻译：
穿越距离对肉食植物Pinguicula moranensis（Lentbulariaceae）健身成分的影响
植物种类在表达负适应性效应的授粉距离上各不相同，并且建议最佳交配应发生在足以减小近交风险的距离上，但应足够短以防止近交衰退。通过在五个距离上与供体进行人工授粉，我们在天然Pinguicula moranensis种群中评估了植物的适合度（每个果实的种子）及其子代（发芽和幼苗存活）与授粉距离的关系，作为授粉距离的函数。 ，1、4和460 m（种群内），以及9,900 m（种群间）在原地和非原位条件下。我们发现健身组件的平均值在现场一直较低实验比异位实验。在两种情况下，自体受精处理的值最低。近交抑制值很高（0.94至0.98），与经过自我受精的异交物种的预期值相对应。总体而言，未检测到近亲抑郁的迹象。考虑到我们的实验仅限于一个供体群体和一个受者群体，我们的结果表明，尽管个体内部分布不规则，但双亲近亲繁殖的发生率可能较低，部分原因是种子传播距离短。但是，至少1 m的花粉运动显然足以抵消负面影响。
更新日期：2020-04-17
中文翻译：
穿越距离对肉食植物Pinguicula moranensis（Lentbulariaceae）健身成分的影响
植物种类在表达负适应性效应的授粉距离上各不相同，并且建议最佳交配应发生在足以减小近交风险的距离上，但应足够短以防止近交衰退。通过在五个距离上与供体进行人工授粉，我们在天然Pinguicula moranensis种群中评估了植物的适合度（每个果实的种子）及其子代（发芽和幼苗存活）与授粉距离的关系，作为授粉距离的函数。 ，1、4和460 m（种群内），以及9,900 m（种群间）在原地和非原位条件下。我们发现健身组件的平均值在现场一直较低实验比异位实验。在两种情况下，自体受精处理的值最低。近交抑制值很高（0.94至0.98），与经过自我受精的异交物种的预期值相对应。总体而言，未检测到近亲抑郁的迹象。考虑到我们的实验仅限于一个供体群体和一个受者群体，我们的结果表明，尽管个体内部分布不规则，但双亲近亲繁殖的发生率可能较低，部分原因是种子传播距离短。但是，至少1 m的花粉运动显然足以抵消负面影响。
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