Systematics of the Marine Red Algal Family Phyllophoraceae (Gigartinales, Rhodophyta) Based on Morphological and Molecular Evidence

基于形态学和分子证据的海洋红藻科Phyllophoraceae（Gigartinales，Rhodophyta）的系统学

• 批准号: 9903900
• 负责人: Suzanne Fredericq
• 金额: $ 19万
• 依托单位: University of Louisiana at Lafayette
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-08-01 至 2002-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9903900&HistoricalAwards=false
• 关键词: Systematics; Marine; Red; Algal; Family

9903900Fredericq Red algae are exceptional for the great diversity in reproductive structures and for their complex life histories. One family of marine red algae, the Phyllophoraceae, in particular exhibits a wide range of life-history types, with corresponding diversity in morphological structures of the various diploid phases of the life cycle, and thus presents an opportunity to assess the phylogenetic importance of reproductive traits relative to the classification of the group. Type of life history and position of the reproductive structures on the plant body have traditionally formed the basis for identifying the 11 or so genera and ca. 100 species in the family; however, preliminary phylogenetic analyses inferred from DNA sequences of the plastid rbcL gene indicate a lack of correlation among the established taxa. This lack of correlation challenges the traditional taxonomy of the group. Dr. Suzanne Fredericq of the University of Southwestern Louisiana will use a comprehensive worldwide survey of the ca. 100 species of Phyllophoraceae (including the small group Petrocelidaceae) to generate new DNA sequence data from nuclear and plastid genes, and morphological data from detailed comparative studies of the same taxa. Integration of the molecular and morphological evidence will provide a phylogenetic framework for the entire group, from which can be reconstructed the sequence of critical developmental stages leading to the diverse "fruiting bodies" of these algae. Determination of the evolutionary relationships among the species of this family will also facilitate the study of their biogeographic distributions and migration patterns. As well, modern taxonomic monographs of the genera will be produced, incorporating the results of the new molecular evidence. An international network of colleagues is helping supply materials for the study, to be completed in collaboration with postdoctoral associate Juan Lopez-Bautista

9903900 Fredericq红藻的生殖结构和复杂的生活史的巨大多样性是例外。一个家庭的海洋红藻，Phyllophoraceae，特别是表现出广泛的生活史类型，与相应的多样性在形态结构的各种二倍体阶段的生活史，从而提供了一个机会，以评估系统发育的重要性，生殖性状相对于组的分类。传统上，生活史类型和生殖结构在植物体上的位置构成了鉴定11个左右属和ca的基础。100种的家庭;然而，初步的系统发育分析推断，从DNA序列的质体rbcL基因表明缺乏相关性之间建立的类群。这种缺乏相关性的情况挑战了传统的群体分类法。路易斯安那州西南大学的苏珊娜·弗雷德里克博士将对这一现象进行全面的全球调查。100种Phyllophoraceae（包括岩芹科），以产生新的DNA序列数据的核和质体基因，和形态数据的详细比较研究相同的类群。整合的分子和形态学证据将提供一个系统发育的框架，为整个集团，从中可以重建的序列的关键发展阶段，导致这些藻类的不同的“子实体”。确定该科物种间的进化关系也将有助于研究它们的地理分布和迁移模式。此外，还将编写这些属的现代分类学专著，其中将纳入新的分子证据的结果。一个由同事组成的国际网络正在帮助为这项研究提供材料，该研究将与博士后助理Juan Lopez-Bautista合作完成