Plastid rbcL sequence data indicate a close affinity between Diegodendron and Bixa
Plastid rbcL sequence data indicate a close affinity between Diegodendron and Bixa
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作者：
Fay, MF;Bayer, C;Chase, MW
毛竹（毛竹科毛竹）是马达加斯加特有植物。该家族是单特异性的，尽管各种亲缘关系已被提出，但其系统发育位置仍不清楚。rbcL序列数据分析表明与Bixa关系密切。这些分类群一起形成了一个单系群，与其他Malvales s.l群（包括cochlospermacae）的关系稍远。cochlospermacae （cochlosperaceae和Amoreuxia）应该作为一个独立于Biraceae的科来维持，但如果Biraceae扩大到包括cochlospermacae，他们也应该包括Diegodendron。描述了从植物标本馆标本中提取DNA，涉及对标准提取和扩增技术的修改。
Diegodendron humbertii Capuron (Diegodendraceae Capuron) is endemic to Madagascar. The family is monospecific, and whereas various affinities have been suggested, its phylogenetic position has remained unclear. Analysis of rbcL sequence data indicates a close relationship to Bixa. Together these taxa form a monophyletic group with a somewhat more distant relationship to other groups of Malvales s.l. including Cochlospermaceae. Cochlospermaceae (Cochlospermum and Amoreuxia) should be maintained as a family distinct from Biraceae but if Biraceae are expanded to include Cochlospermaceae they should also include Diegodendron. DNA extraction from herbarium specimens, involving modifications to the standard extraction and amplification techniques, is described.