A chloroplast DNA phylogeny of Solanum section Lasiocarpa
A chloroplast DNA phylogeny of Solanum section Lasiocarpa
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DOI：
10.1600/036364404772974310
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发表时间：
2004-01-01
影响因子：
1
通讯作者：
Bohs, L
中科院分区：
文献类型：
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作者：
Bohs, L
龙葵科：龙葵科包括大约12个物种，其多样性中心位于新世界热带地区。Solanum lasiocarpum和S. repandum（有时被认为与S. ferox同属）在亚洲和太平洋岛屿的旧大陆分布。这部分的几个品种出产可食用的果实，其中两种，lulo或naranjilla （S. quitoense）和椰子（S. sessiliflorum）是商业种植的。利用叶绿体trnT-trnL间隔段、trnL- trnf间隔段和trnL基因（含trnL内含子）的序列数据，研究了茄属植物Lasiocarpa的系统发育关系。取样包括Lasiocarpa组的24份材料和其他茄属植物的14份材料。除最近描述的S. atheniae外，所有先前作者认为属于Lasiocarpa剖面的物种都进行了研究。根据trn数据，有时被认为属于Lasiocarpa剖面的Solanum robustum和S. stagale被排除在该组之外。该剖面中剩余的种形成了一个单系群，其中有三个支持良好的分支：S. hirtum， S. pectinatum-sessiliflorum-stramonifolium，以及该剖面中剩余的种。这两个亚洲分类群的序列非常相似，并与新世界的candidum和pseudolulo分布在三棵树上。
Solanum section Lasiocarpa includes about a dozen species with a center of diversity in the New World tropics. Solanum lasiocarpum and S. repandum (sometimes considered to be conspecific as S. ferox) have an Old World distribution in Asia and the Pacific Islands. Several species in this section produce edible fruits, and two, the lulo or naranjilla (S. quitoense) and the cocona (S. sessiliflorum) are cultivated commercially. Phylogenetic relationships in Solanum section Lasiocarpa were investigated using sequence data from the chloroplast trnT-trnL spacer, the trnL-trnF spacer, and the trnL gene, including the trnL intron. Sampling included 24 accessions from section Lasiocarpa and 14 accesssions of other Solanum species as outgroups. All species considered to belong to section Lasiocarpa by previous authors were examined with the exception of the recently described S. atheniae. Solanum robustum and S. stagnale, sometimes considered to belong to section Lasiocarpa, are excluded from the group on the basis of the trn data. The remaining species in the section form a monophyletic group, with three well-supported clades within it: S. hirtum, S. pectinatum-sessiliflorum-stramonifolium, and the remainder of the species in the section. Sequences of S. lasiocarpum and S. repandum are extremely similar, and these two Asian taxa cluster with the New World S. candidum and S. pseudolulo on the trn trees.