PLASTOME SEQUENCES OF TWO NEW WORLD BAMBOOS-ARUNDINARIA GIGANTEA AND CRYPTOCHLOA STRICTIFLORA (POACEAE)-EXTEND PHYLOGENOMIC UNDERSTANDING OF BAMBUSOIDEAE
PLASTOME SEQUENCES OF TWO NEW WORLD BAMBOOS-ARUNDINARIA GIGANTEA AND CRYPTOCHLOA STRICTIFLORA (POACEAE)-EXTEND PHYLOGENOMIC UNDERSTANDING OF BAMBUSOIDEAE
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DOI：
10.3732/ajb.1200365
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发表时间：
2012-12-01
影响因子：
3
通讯作者：
Duvall, Melvin R.
中科院分区：
文献类型：
--
作者：
Burke, Sean V.;Grennan, Colin P.;Duvall, Melvin R.
研究前提：对竹亚科的两个新大陆种--竹斑野竹和狭花野竹进行了染色体组学研究。完整的质体序列先前已确定和分析的九个bestroids物种，专门代表旧世界的血统。新世界种的加入为竹亚科内的亲缘关系提供了更完整的信息。和C.采用桑格法测定了狭花杜鹃的全序列。结果：系统基因组和分歧估计分析表明，A. 1.94- 3.92mya之间，C.在24.83 ~ 40.22 mya之间，strictiflora分化为热带木本植物的姐妹种。这些结果与现代相对dilibrium在这两个lineage.Conclusions：这两个新世界的竹子显示出独特的质体功能积累和保持在旧世界类群的地理隔离。对A. Alcantea与最近的传播相一致，C。strictiflora与地理分隔相一致。
Premise of the study: Two New World species of Bambusoideae, Arundinaria gigantea and Crytpochloa strictiflora, were investigated in a phylogenomic context. Complete plastome sequences have been previously determined and analyzed for nine bambusoid species that exclusively represent Old World lineages. The addition of New World species provides more complete information on relationships within Bambusoideae.Methods: Plastomes from A. gigantea and C. strictiflora were sequenced using Sanger methods. Phylogenomic and divergence estimate analyses were conducted on both species with 23 other Poaceae.Key Results: Phylogenomic and divergence analyses suggested that A. gigantea diverged from within Arundinarieae between 1.94-3.92 mya and that C. strictiflora diverged as the sister to tropical woody species between 24.83 and 40.22 mya. These results are correlated with modern relative diversities in the two lineages.Conclusions: The two New World bamboos show unique plastome features accumulated and maintained in biogeographic isolation from Old World taxa. The overall evidence for A. gigantea is consistent with recent dispersal, and that for C. strictiflora is consistent with vicariance.