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首页> 外文期刊>American Journal of Botany >The effect of interplant distance on mating success in federally threatened, self-incompatible Hymenoxys herbacea = H. acaulis var. glabra (Asteraceae)
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The effect of interplant distance on mating success in federally threatened, self-incompatible Hymenoxys herbacea = H. acaulis var. glabra (Asteraceae)

机译：种间距离对受联邦威胁的，自交不亲和的Hymenoxys herbacea = H. acaulis var交配成功的影响。 glabra（菊科）

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摘要

We investigated large- and fine-scale effects of interplant distance on compatibility, seed set, and seed germination in a rare, self-incompatible perennial, Lakeside daisy (Hymenoxys herbacea = H. acaulis var. glabra). Plants were collected at the Marblehead Peninsula. Ohio, and transplanted to a greenhouse where they were hand-pollinated. For the large-scale analysis, 110 crosses were classified in three categories: Near crosses (0.75-6.70 m), Far crosses (17-72 m), and Very Far crosses (>900 ml. There was no significant effect of interplant distance on compatibility, seed set, or seed germination in these crosses. For the fine-scale analysis, we made 44 crosses with interplant distances ranging from 0.75 to 10 m. At this scale, interplant distance explained 10.9% of the variance of the seed/floret ratio, suggesting that local genetic structure may result in a modest amount of biparental inbreeding. We found no fine-scale effects of interplant distance on compatibility or percentage of seed germination, but it is possible that biparental inbreeding could affect later stages of the life cycle not included in this study. For all distance classes, >80% of the crosses were compatible, indicating that lack of compatibility between mates is not likely to limit seed production. Apparently, presumed population bottlenecks have not been severe enough for genetic drift to eliminate substantial numbers of self-incompatibility alleles.
机译：我们研究了一种罕见的，自交不亲的多年生湖边雏菊（Symenoxys grassacea =）中，种间距离对 相容性，种子结实和种子萌发的大规模和精细影响。 H. acaulis var。glabra）。 在马布尔黑德半岛收集了植物。俄亥俄州，然后将 移植到人工授粉的温室中。对于大规模 分析，将110个十字架分为三类：近十字架 （0.75-6.70 m），远十字架（17-72 m）和极远十字架杂交（> 900 ml。 ）在这些杂交中，株间距离对配伍性， 种子结实或种子萌发没有显着影响。 / sup>分析，我们进行了44次杂交，株间距离从0.75到 10 m，在这种规模下，株间距离解释了种子/小花的 方差的10.9％。比率，表明局部遗传结构可能导致适度的双亲近亲繁殖 ，我们没有发现种间距离对配种或种子发芽率的细微影响 sup> ，< sup> ，但双亲近亲繁殖可能会影响本研究未包括的 生命周期的后期阶段，对于所有距离类别， 兼容性不太可能限制种子生产。 显然，推测的种群瓶颈对于 遗传而言还不够严重。漂移以消除大量的自我不相容性 等位基因。

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