title: The Complete Chloroplast Genome of Guadua angustifolia and Comparative Analyses of Neotropical-Paleotropical Bamboos.
abstract: To elucidate chloroplast genome evolution within neotropical-paleotropical bamboos, we fully characterized the chloroplast genome of the woody bamboo Guadua angustifolia. This genome is 135,331 bp long and comprises of an 82,839-bp large 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 content and sequence evolutionary rates between neotropical and paleotropical woody bamboos. The neotropical herbaceous bamboo Cryptochloa strictiflora differs from woody bamboos in IR/SSC boundaries in that it exhibits slightly contracted IRs and a faster substitution rate. The G. angustifolia chloroplast genome is similar in size to that of neotropical herbaceous bamboos but is ~3 kb smaller than that of paleotropical woody bamboos. Dissimilarities in genome size are correlated with differences in the lengths of intergenic spacers, which are caused by large-fragment insertion and deletion. Phylogenomic analyses of 62 taxa yielded a tree topology identical to that found in preceding studies. Divergence time estimation suggested that most bamboo genera diverged after the Miocene and that speciation events of extant species occurred during or after the Pliocene.
authors.affiliation: Forestry College, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China.
authors.forename: Miaoli
authors.initials: M
authors.lastname: Wu
authors.affiliation: Forestry College, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China.
authors.forename: Siren
authors.initials: S
authors.lastname: Lan
authors.affiliation: Xiamen Botanical Garden, Xiamen, 361000, Fujian, China.
authors.forename: Bangping
authors.initials: B
authors.lastname: Cai
authors.affiliation: Forestry College, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China.
authors.forename: Shipin
authors.initials: S
authors.lastname: Chen
authors.affiliation: Forestry College, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, the Chinese Academy of Sciences, Beijing, 100093, China.
authors.forename: Shiliang
authors.initials: S
authors.lastname: Zhou
mesh_terms: D002874:Chromosome Mapping; D017124:Conserved Sequence; D018742:DNA, Chloroplast / Q000235:genetics; D019143:Evolution, Molecular; D054628:Genome, Chloroplast; D018745:Genome, Plant; D010802:Phylogeny; D006109:Poaceae / Q000145:classification / Q000235:genetics*; D013045:Species Specificity; D013997:Time Factors; D014329:Tropical Climate
chemical_list: D018742:DNA, Chloroplast