Silvain J F, Delobel A
Populations, Génétique et Evolution (Equipe INRA-ORSTOM), CNRS, 209-213 rue La Fayette, Paris, 75480, France.
Mol Phylogenet Evol. 1998 Jun;9(3):533-41. doi: 10.1006/mpev.1998.0502.
Seed beetles belonging to the Old World genus Caryedon feed in the seeds of various Caesalpinioideae, Mimosoideae, and Combretaceae. In an attempt to resolve broad phylogenetic relationships within the genus, we obtained 332 base pair sequences of mitochondrial 12S ribosomal DNA and morphological data for the 16 West African Caryedon species. Morphological characters were analyzed under maximum parsimony and sequences were compared under maximum parsimony, maximum likelihood, and neighbor joining. Using a partition homogeneity test, we determined that morphological and molecular data sets were combinable. Combined data were analyzed under maximum parsimony. Morphological and molecular trees were congruent at the species group level and total evidence analyses yielded the same topologies as molecular data with each of the three outgroups used. Four main terminal clades are recognized, each corresponding with a group of species generally feeding on the same host plant family, subfamily, genus, or species. The monophyly of legume feeding Caryedon is supported by both data sets, and Combretaceae feeders split in two monophyletic assemblages.
属于旧大陆卡里登属的种子甲虫以各种苏木科、含羞草科和使君子科植物的种子为食。为了厘清该属内广泛的系统发育关系，我们获得了16种西非卡里登物种的线粒体12S核糖体DNA的332个碱基对序列以及形态学数据。在最大简约法下分析形态特征，并在最大简约法、最大似然法和邻接法下比较序列。通过分区同质性检验，我们确定形态学和分子数据集是可合并的。在最大简约法下分析合并的数据。形态学树和分子树在物种组水平上是一致的，并且使用三个外类群中的每一个进行的总证据分析产生了与分子数据相同的拓扑结构。识别出四个主要的末端分支，每个分支对应一组通常以相同寄主植物科、亚科、属或物种为食的物种。两个数据集都支持以豆科植物为食的卡里登的单系性，以使君子科植物为食的物种分为两个单系类群。
