Early Cretaceous lineages of monocot flowering plants
Early Cretaceous lineages of monocot flowering plants
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DOI：
10.1073/pnas.080421597
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发表时间：
2000-04-25
影响因子：
11.1
通讯作者：
Bremer, K
中科院分区：
文献类型：
--
作者：
Bremer, K
通过DNA序列数据的分析，显花植物的进化史正在迅速被揭示，目前，许多白垩纪的显花植物化石正在被描述。将分子系统发育学与已知最小年龄的参考化石相结合，可以确定系统发育树的节点。可以通过计算沿着进化史分支沿着测序基因的推断变化，并使用参考化石计算变化率来确定年代。质体DNA rbcL序列和8个参考化石表明，大约14个现存的单子叶植物谱系可能在早白垩世> 1亿年B.P.之间相互分化。这些谱系在大小和地理分布上有很大差异，并为有花植物进化提供了视角。
The phylogeny of flowering plants is now rapidly being disclosed by analysis of DNA sequence data, and currently, many Cretaceous fossils of flowering plants are being described. Combining molecular phylogenies with reference fossils of known minimum age makes it possible to date the nodes of the phylogenetic tree. The dating may be done by counting inferred changes in sequenced genes along the branches of the phylogeny and calculating change rates by using the reference fossils. Plastid DNA rbcL sequences and eight reference fossils indicate that approximate to 14 of the extant monocot lineages may have diverged from each other during the Early Cretaceous >100 million years B.P. The lineages are very different in size and geographical distribution and provide perspective on flowering plant evolution.