Abstract：
Green tides in the Yellow Sea have occurred periodically since 2007, impacting the ecological environment and green algal communities along the coasts of Jiangsu and Shandong provinces in China. To investigate the morphological characteristics and genetic diversity of Ulva prolifera, we conducted surveys and comparative analyses of both its floating and attached forms along the coastal areas of Jiangsu and Shandong. The results revealed that the external morphology of the floating U. prolifera was multibranched. The attached U. prolifera displayed significant morphological variation among individuals. Based on the analysis of the amplified characteristic bands of the chloroplast gene, it was shown that both floating and attached U. prolifera could hybridize with Ulva linza. The genetic diversity of U. prolifera was studied using mitochondrial and chloroplast genome fragments. All floating U. prolifera and three strains of attached U. prolifera belonged to the same haplotype. The genetic diversity of floating U. prolifera was low, and there were some genetic differences with attached U. prolifera. The attached U. prolifera displayed a higher level of genetic diversity with abundant sites of variation and haplotypes.
摘要：
自2007年以来，黄海的绿潮周期性发生，影响了中国江苏和山东沿海的生态环境和绿藻群落。为探讨榆树的形态特征和遗传多样性,我们对江苏和山东沿海地区的漂浮和附着形式进行了调查和比较分析。结果表明，漂浮U.prolima的外部形态是多分支的。附着的U.promula在个体之间显示出明显的形态差异。通过对叶绿体基因扩增特征带的分析,研究表明，漂浮和附着的U.prolima都可以与Ulvalinza杂交。使用线粒体和叶绿体基因组片段研究了U.prolima的遗传多样性。所有漂浮的U.prophia和三个附着的U.prophia属于相同的单倍型。浮动U.prolifera的遗传多样性较低，和有一些遗传差异与附着者。附加的U.prolima显示出更高水平的遗传多样性，具有丰富的变异位点和单倍型。
