Systematic position of Gyrocheilos and some odd species of Didymocarpus （Gesneriaceae）inferred from molecular data, with reference to pollen and other morphological characters  

作　　者：Jia-Mei Li Wei-Juan Sun Ying Chang Wen-Guang Yang 

机构地区：[1]College of Life Sciences, Henan Agricultural University, Zhengzhou 45ooo2, China

出　　处：《Journal of Systematics and Evolution》2016年第2期113-122,共10页植物分类学报（英文版）

基　　金：Work started while the first author was working at PE and would like to take this opportunity to thank Dr. Yin Zheng Wang for guidance. We are grateful to Professor James Smith for his constructive comments and language improvements on the manuscript, and to Dr. Fang Wen for kindly providing dried leaves of some species analyzed in this study. We would like to thank the institutions （PE, HITBC, and HEAC） that provided pollen for this study. This research was supported bythe National Natural Science Foundation of China （Grant Nos. 31070171 and 31270236） and the West Light Foundation of the Chinese Academy of Sciences.

摘　　要：A phylogenetic analysis was carried out to clarify the systematic position of Gyrocheilos and Didymocarpus, particularly the species placed in Didymocarpus sect. Heteroboea by Wang et al. Based on sequencing the internal transcribed spacer and the chloroplast spacer trnL-F, parsimony and Bayesian inference analyses were carried out using separate nuclear and chloroplast datasets, as well as a combined dataset. Our results showed that the two sections of Didymocarpus in China and Gyrocheilos did not form separate monophyletic subclades, but turned up in three different places in the phylogenetic trees. In the frame of the present study, the pollen morphology of the species included in the analysis was studied. It proved inconsistent with the delimitation between Didymocarpus and Gyrocheilos. Furthermore, pollen and other morphological characters indicate that Gyrocheilos and some taxa of Didymocarpus should be placed within Didymocarpus.A phylogenetic analysis was carried out to clarify the systematic position of Gyrocheilos and Didymocarpus, particularly the species placed in Didymocarpus sect. Heteroboea by Wang et al. Based on sequencing the internal transcribed spacer and the chloroplast spacer trnL-F, parsimony and Bayesian inference analyses were carried out using separate nuclear and chloroplast datasets, as well as a combined dataset. Our results showed that the two sections of Didymocarpus in China and Gyrocheilos did not form separate monophyletic subclades, but turned up in three different places in the phylogenetic trees. In the frame of the present study, the pollen morphology of the species included in the analysis was studied. It proved inconsistent with the delimitation between Didymocarpus and Gyrocheilos. Furthermore, pollen and other morphological characters indicate that Gyrocheilos and some taxa of Didymocarpus should be placed within Didymocarpus.

关 键 词：Didymocarpus Gyrocheilos PHYLOGENY pollen. 

分 类 号：Q944.42[生物学—植物学] TS805.4[轻工技术与工程]