Phylogeny of Magnoliaceae based on ten chloroplast DNA regions
Phylogeny of Magnoliaceae based on ten chloroplast DNA regions
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DOI：
10.1007/s12374-013-0111-9
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发表时间：
2013-10-01
影响因子：
2.9
通讯作者：
Suh, Youngbae
中科院分区：
文献类型：
--
作者：
Kim, Sangtae;Suh, Youngbae
对48个木兰科植物的10个叶绿体DNA区域ndhF、rbcL、matK、ORF350、trnL内含子、trnL-trnF、trnH-PSBA、rbcL-atpB、trnK 5‘内含子和trnK 3’内含子(8,719个碱基)进行了系统发育分析。分子树中的主要分支与目前建议的分类系统和该科传统上公认的亚群有很大的不同。11个主要支系在木兰亚科中得到了强有力的支持：(1)含笑支系：含笑亚科含笑亚科Elmerrillia亚科含笑亚科。Maingola，Sect.Alcimandra和Sect.Aromadendron，(2)玉兰分支：亚属。Yulania，(3)雌蕊支系：Pachylarnax，Sect.和Sect.Gynpodium，(4)Kmeria支序：Kmeria，(5)THEORHODON支序：Sect.Theorhodon Sensu Structo(不包括Sect.Splendentes，最近从Sect.Theorhodon)和Sect.Magnolia，(6)GWILLIMIA支系：Sect.Gvelimia，Sect.Lirianthe和Sect.Blumiana，(7)TALAUMA支序：Sect.Talauma和Sect.Splendentes，(8)Manglietia支系：Manglietia，(9)RYTIDOSPERMUM支系：Sect.Rytidosperum Sense u Stricto(不包括白玉兰、大叶木兰和白玉兰)和Sect.Oyama，(10)Fraseri支序：M.fraseri，和(11)大叶支序：M.macPhylla和M.derbata。本研究中对木兰亚科11个主要分支的识别与以往基于较少采样或较少DNA区域的分子研究相一致。所有这11个分支都得到了高度支持，在最大简约和最大似然分析中，Bootstrap值都超过80%，在贝叶斯分析中，后验概率超过0.98。然而，主要支系之间的详细关系得到的支持很弱。分子数据表明，应重新考虑家系下界和组成的分类界限。
Phylogenetic analyses of ten chloroplast DNA regions, ndhF, rbcL, matK, ORF350, trnL intron, trnL-trnF, trnH-psbA, rbcL-atpB, trnK 5' intron, and trnK 3' intron (8,719 bp in aligned sequences) from 48 selected taxa were carried out to address phylogenetic questions in the family Magnoliaceae. The major clades in the molecular tree are considerably different from the currently suggested classification system and from the traditionally recognized subgroups in the family. Eleven major clades were recognized with strong support in the subfamily Magnolioideae: (1) MICHELIA clade: Michelia, Elmerrillia, sect. Maingola, sect. Alcimandra, and sect. Aromadendron, (2) YULANIA clade: subgen. Yulania, (3) GYNOPODIUM clade: Pachylarnax, sect. Manglietiastrum, and sect. Gynopodium, (4) KMERIA clade: Kmeria, (5) THEORHODON clade: sect. Theorhodon sensu stricto (excluding sect. Splendentes, which was recently separated from sect. Theorhodon) and sect. Magnolia, (6) GWILLIMIA clade: sect. Gwillimia, sect. Lirianthe, and sect. Blumiana, (7) TALAUMA clade: sect. Talauma and sect. Splendentes, (8) MANGLIETIA clade: Manglietia, (9) RYTIDOSPERMUM clade: sect. Rytidospermum sensu stricto (excluding Magnolia fraseri, M. macrophylla, and M. dealbata) and sect. Oyama, (10) FRASERI clade: M. fraseri, and (11) MACROPHYLLA clade: M. macrophylla and M. dealbata. The recognition of eleven major clades in the subfamily Magnolioideae in this study is in good agreement with previous molecular studies based on less sampling or fewer DNA regions. All of these eleven clades were highly supported with bootstrap values exceeding 80% in both maximum parsimony and maximum likelihood analyses and with posterior probabilities exceeding 0.98 in a Bayesian analysis. However, detailed relationships among the major clades were weakly supported. The molecular data suggest that the taxonomic circumscription of infrafamilial delimitations and compositions should be reconsidered.