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首页> 外文期刊>Ecosphere >Discovery of a dune‐building hybrid beachgrass ( Ammophila arenaria?×? A.?breviligulata) in the U.S. Pacific Northwest
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Discovery of a dune‐building hybrid beachgrass ( Ammophila arenaria?×? A.?breviligulata) in the U.S. Pacific Northwest

机译：发现沙丘建筑混合海滩草（ ammophila arenaria ？×？ a.beregiligulata ）在美国太平洋西北地区

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摘要

The production of novel hybrid zones is an ecologically important consequence of globally increasing rates of species introductions and invasions. Interspecific hybridization can facilitate gene flow between parent species or produce novel taxa that may alter invasion dynamics or ecosystem services. The coastal sand dunes of the U.S. Pacific Northwest coast are densely populated by two non‐native, congeneric, dune‐building beachgrasses (Ammophila arenaria andA.?breviligulata ). Here, we present morphological, cytological, and genetic evidence that the two beachgrass species have hybridized in this globally unique range overlap. TheA.?arenaria ?×?A.?breviligulata hybrid has been found at 12 coastal sites in Washington and Oregon. It is a first‐generation hybrid between the beachgrass species as evidenced by genome size comparisons and single nucleotide polymorphism genotyping. It is intermediate between the parent grasses in many morphological characters but exceeds both parents in shoot height, a trait associated with dune‐building potential. Understanding the ecological and population genetic consequences of this novel hybridization event is of the utmost importance in a system where any change in dominant beachgrass species can have large effects on both biodiversity management and coastal protection.
机译：新型杂交区的生产是世规论地增加物种介绍和入侵率的生态重要性后果。间隙杂交可以促进母体物种之间的基因流量或产生可能改变入侵动力学或生态系统服务的新型分类群。美国太平洋西北海岸的沿海沙丘受到两个非原生，Congeneric，沙丘大楼沙滩（ Ammophila arenaria和 A. a.breviligulata）的密集。在这里，我们表现了形态学，细胞学和遗传证据，即两个海滩草种在全球独特的范围重叠中杂交。 A.? arenaria？×？ A.?breviligulata混合在华盛顿和俄勒冈州的12个沿海网站上被发现。这是由基因组大小比较和单核苷酸多态性基因分型所证明的沙兰物种之间的第一代杂交。它是父草之间的中间形态特征，但超过拍摄高度的父母，一种与沙丘建设潜力相关的特征。了解这种新型杂交事件的生态和群体遗传后果在一个系统中最重要的是，主导海滩种类的任何变化都可以对生物多样性管理和沿海保护产生大量影响。

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