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首页> 外文期刊>Biotropica >Mating system parameters in a tropical tree species, Shorea leprosula Miq. (Dipterocarpaceae), from Malaysian lowland dipterocarp forest
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Mating system parameters in a tropical tree species, Shorea leprosula Miq. (Dipterocarpaceae), from Malaysian lowland dipterocarp forest

机译：热带树种Shore leprosula Miq的交配系统参数。 （龙脑香科），来自马来西亚低地龙脑香林

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摘要

The mating system in a natural population of Shorea leprosula from Malaysian lowland dipterocarp forest was quantified by allozyme analysis using the multi-locus mixed-mating model. The population was found to be predominantly outcrossed (t_m = 0.837 +- 0.066). Variation in individual multi-locus outcrossing rates (range = 0.55-1.00) may have reflected variation in individual self-compatibility, heterogeneity in the pollen pool, differences in the mating neighborhood of individuals, or population substructure. Departure from the mixed-mating model was evident from the differences in pollen and ovule allele frequencies. Pollen pool heterogeneity and significant levels of biparental mating (t_m - t_s = 0.127, P < 0.01) indicated that the population was most probably genetically substructured. The inbreeding coefficient based on Wright's fixation index for maternal trees (F_a = -0.078) was lower than that obtained for progenies (F_e = 0.089), suggesting considerable selection against selfed progenies during growth of seedlings to reproductive size. Incidence of multiple seedlings was observed in a small proportion of seeds, but genetic analysis and genotype comparisons showed that this was not due to apomixis and may have been caused by multiple fertilization.
机译：使用多位点混合交配模型通过等位酶分析定量了来自马来西亚低地龙脑香树林的麻风树天然种群的交配系统。发现该群体主要是杂种的（t_m = 0.837 +-0.066）。个体多基因座异交率的变化（范围= 0.55-1.00）可能反映了个体自我相容性，花粉池异质性，个体交配邻里差异或种群子结构的变化。从花粉和胚珠等位基因频率的差异可以明显看出混合交配模型的偏离。花粉池异质性和双亲交配的显着水平（t_m-t_s = 0.127，P <0.01）表明该种群很可能是遗传亚结构的。基于赖特固着指数的母树近交系数（F_a = -0.078）低于后代获得的近交系数（F_e = 0.089），表明在幼苗生长至繁殖体时，对自交后代的选择相当多。在少数种子中观察到多株幼苗的发生，但是遗传分析和基因型比较表明，这不是由于无融合生殖引起的，并且可能是由多次施肥引起的。

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