东亚——北美东部间断透骨草属的扩增片段长度多态性(英文)

AFLP Analysis of Phryma (Phrymaceae) Disjunct between Eastern Asia and Eastern North America

透骨草属(Phryma)是一个单种属,间断分布于东亚与北美东部。尽管东亚与北美东部居群形态差异非常小,但分子变异却非常明显。本研究进一步运用AFLP两对引物来衡量透骨草属的遗传多样性并评估其形态保守性。结果发现透骨草的遗传差异主要存在于两大洲的居群之间。聚类与PCA分析显示透骨草分成两大支与其地理分布相吻合,一支全部来自东亚,另一支则是北美东部的居群。我们的结果强烈支持透骨草东亚——北美东部居群存在明显的遗传分化和形态保守。

Although little morphological differentiation is detected between intercontinental disjunct populations of Phryma, this monotypic genus shows distinct molecular divergence corresponding to its distribution in eastern Asia and eastem North America. This study further employs amplified fragment length polymorphism （AFLP） analyses using two selective primer pairs to quantify genetic diversity and evaluate the morphological stasis. Most of the molecular variance is accoanted for by variance among populations between regions. Cluster and PCA analyses revealed that Phryma constitutes two major groups in line with their geographic distribution, with one genetically distinct group from the eastern Asia and the other with accessions from eastern Noah America. The results robustly supported the distinct genetic divergence and morphological stasis in Phryma.