A Nested Phylogenetic Analysis of Malvales, Bombacaceae and Adansonieae

小行星9419997 锦葵属植物含有Ca。5000种主要的热带植物，包括几种重要的经济植物（棉花，巧克力，秋葵，芙蓉）。 这项研究由哈佛大学的大卫鲍姆博士和他的同事威廉阿尔弗森博士将采用分子技术和植物形态分析来研究该目的进化，特别是某些群体在三个嵌套层次上的繁殖。 锦葵目在开花植物的主要双子叶植物辐射中的位置;木棉科（木棉科）在该目中的位置;以及木棉科的部落和属之间的关系，是三个强调的层次。 分子生物学研究将包括确定木棉科和相关锦葵科，椴树科和梧桐科的代表性物种的DNA序列，重点是几个叶绿体基因。 在平行的木棉科和其他三个家庭的亲属属的形态特征进行了研究，并结合数据集将被用来推断类群之间的系统发育关系。 由此产生的系统发育框架可以用来解释巨大的多样性，花的形式在木棉科和占染色体数量的进化变化和地理迁移通过时间。 ??

9419997 Baum The plant order Malvales contains ca. 5000 species of mainly tropical plants including several of economic importance (cotton, chocolate, okra, hibiscus). This study by Dr. David Baum of Harvard University and his colleague Dr. William Alverson will employ molecular techniques and analyses of plant morphology to study the evolution of the order, and in particular the phylogeny of certain groups at three nested levels. The placement of the order Malvales within the major dicot radiation of flowering plants; the placement of the family Bombacaceae (the kapok family) within the order; and relationships among the tribes and genera of Bombacaceae, are the three levels of emphasis. The molecular studies will involve the determination of DNA sequences from representative species of Bombacaceae and related Malvaceae, Tiliaceae, and Sterculiaceae, with emphasis on several chloroplast genes. In parallel the genera of Bombacaceae and relatives in the other three families will be studied for morphological characteristics, and the combined datasets will be used to infer phylogenetic relationships among the taxa. The resulting phylogenetic framework can be used to explain the great diversity of floral form within Bombacaceae and to account for evolutionary shifts in chromosome number and for geographical migrations through time. ??