Systematics and Geographic Relations of Phlox L. (Polemoniaceae)

弗格森和帕特森北美福禄草属(Polemoniaceae)，约有种，几十年来一直是众多生态和进化研究的对象，但该群的分类依赖于一本现已有50年历史的专著，该专著写于可用于清晰、明确的系统发育分析的方法之前。堪萨斯州立大学的Carolyn Ferguson博士和她的同事旧金山州立大学的Robert Patterson博士正在研究该属所有物种的分子(DNA)和形态变异模式，以便为该群体构建系统发育树，从而研究授粉关系的进化、生活史、地理迁徙和范围、多倍体和杂交等问题。福禄克属是该科中最大的属，与该科中的所有温带属一样，其多样性中心位于北美西部。目前正在努力对所有物种进行采样，以进行核和叶绿体DNA序列的分子分析，以及叶绿体基因组的限制性内切酶图谱，作为系统发育分析突变特征的来源。田野和植物标本研究还将从形态学和重新检查已发表的描述中增加新的数据。在Phlox的一些物种复合体中已经报道了杂交，并在Pilosa和angberrima组中得到了证实，并将成为核和叶绿体联合分析的重点。对该属的分子和形态的综合研究将有助于为正在进行的北美植物群项目撰写该物种的主要分类学处理，作为额外的贡献。

0089656Ferguson and Patterson The North American genus Phlox (family Polemoniaceae), with about 64 species, has been the object of numerous ecological and evolutionary studies for many decades, but the taxonomy of the group has relied upon a now-50 year old monograph written before methods were available for clear, explicit analyses of phylogenetic relationships. Dr. Carolyn Ferguson at Kansas State University, with her colleague Dr. Robert Patterson at San Francisco State University, is studying molecular (DNA) and morphological patterns of variability in all the species of the genus, in order to construct a phylogenetic tree for the group, and thereby examine questions about evolution of pollination relationships, life history, geographic migration and ranges, and polyploidy and hybridization. Phlox is the largest genus in the family, and like all temperate genera in the family has its center of diversity in western North America. Efforts are underway to sample all of the species for molecular analyses of nuclear and chloroplast DNA sequences and for restriction-enzyme mapping of the chloroplast genome, as sources of mutational characters for phylogenetic analysis. Field and herbarium studies will also add new data from morphology, and for re-examination of published descriptions. Hybridization has been reported in a number of species complexes in Phlox, and has been confirmed in the pilosa and glaberrima groups, and will be the focus of combined nuclear and chloroplast analyses. The combined molecular and morphological studies of the genus will facilitate writing of major taxonomic treatments for the species for the ongoing Flora of North America project, as an additional contribution.