Complete chloroplast genome of Guadua angustifolia and comparative analyses of neotropical-paleotropical bamboos
The number of chloroplast genomes of bamboos was growing, with an emphasis on Old World woody species.However, the chloroplast genomes of neotropical woody bamboos had rarely been studied.To pinpoint the pattern of chloroplast genome evolution within neotropical-paleotropical bamboos, we fully characterized one new chloroplast genome, for the woody bamboo Guadua angustifolia.The chloroplast genome of G.angustifolia was 135,332 bp long and was composed of an 82,840 bplarge single-copy (LSC) region, a 12,898 bp small single-copy (SSC) region, and a pair of 19,797 bp inverted repeats (IRs).Comparative analyses revealed marked conservation of gene contents and sequence evolutionary rates between neotropical and paleotropical woody bamboos.The neotropical herbaceous bamboo differed from woody bamboos in IR/SSC boundary due to slightly contracted IR and faster substitution rate.The chloroplast genome of G.angustifolia was similar in size to that of neotropical herbaceous bamboo but, notably, was ~3k bp smaller than that of paleotropical woody bamboos.Dissimilarities in genome size were correlated with various lengths of intergenic spacers caused by large-fragment insertion and deletion.Phylogenomic analyses of 53 taxa yielded an identical tree topology as in preceding studies.Divergence time estimation suggested that most genera of bamboos diverged in the Miocene and that speciation events of extant species happened in or after the Pliocene.
Guadua angustifolia chloroplast genome neotropical-paleotropical bamboos substitution rates genome evolution
WU Miaoli LAN Siren CAI Bangping CHEN Shipin CHEN Hui ZHOU Shiliang
School of Forestry, Fujian Agricultural and Forestry University, Fuzhou 350002,Fujian, China Xiamen Botanical Garden, Xiamen 361000, Fujian, China State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany,the Chinese Academy
国内会议
中国林学会树木学分会第十七届学术年会暨海峡两岸树木学教学研讨会
南京
英文
18-32
2015-08-01（万方平台首次上网日期，不代表论文的发表时间）