海三棱藨草[Scirpus x mariqueter Tang&F.T. Wang=Bolboschoenus planiculmis (F. Schmidt) T. Koyama]是滩涂的先锋物种,分布于长江口和杭州湾的潮间带。本文对海三棱藨草的分类学疑点、种群遗传结构和有性繁殖策略进行了综合研究。内容包括四部分:1)利用AFLP分子标记检验了海三棱藨草是否为杂交起源;2)基于核糖体基因的ITS序列对海三棱藨草及其近缘种的亲缘关系进行分析;3)通过分析遗传变异的空间分布格局及其影响因子,探讨了河口异质生境对其遗传结构的影响;4)利用杂交实验对海三棱藨草和扁秆藨草[Scirpus planiculmis=Bolboschoenus planiculmis (F. Schmidt) T.V. Egorova]的有性繁殖策略作初步探讨,并通过种间杂交进一步理解这两个种的亲缘关系。
1)AFLP分子标记推断海三棱藨草与其潜在的亲本扁秆藤草和藨草[Scirpus triqueter L.=Schoenoplectus triqueter (L.) Palla]之间的关系。研究发现,海三棱藨草与藨草之间的遗传距离...
【英文摘要】
Scirpus x mariqueter Tang&F.T. Wang [=Bolboschoenus planiculmis (F. Schmidt) T. Koyama] is a pioneer species that confined to the brackish habitats of the inter-tidal zone of Yangtze estuary and Hangzhou bay. Studies on clarifying the dubious taxonomic status of Scirpus x mariqueter Tang&F.T. Wang [=Bolboschoenus planiculmis (F. Schmidt) T. Koyama], population genetic structure and breeding system were carried. This report is composed of four parts. Firstly, AFLP markers were applied for hybrid detection of...