草业科学2026，Vol.43Issue(2)：350-360,11.DOI:10.11829/j.issn.1001-0629.2024-0755
禾本科大油芒属5个叶绿体基因组比较分析
Comparative analysis of five chloroplast genomes in Spodiopogon(Poaceae)
摘要
Abstract
The classification status of Spodiopogon in the family Poaceae is unclear.We aimed to provide novel insights into the chloroplast genome characteristics and phylogenetic relationships of Spodiopogon by sequencing,assembling,annotating,and analyzing structural features of the chloroplast genomes of five closely related species:S.sagittifolius,S.cotulifer,S.sibiricus,S.duclouxii,and S.formosanus.Analysis revealed that all five chloroplasts possessed a typical quadripartite structure,with a consistent number of protein-coding genes,tRNAs,and rRNAs.Although slight variations were observed in the inverted repeat(IR)/large single-copy(LSC)boundaries,the overall structure was highly conserved.The LSC and small single-copy regions exhibited greater divergence than the IR region.Codon usage bias was observed across all species,with minimal interspecies variation.Phylogenetic analysis supported the monophyly of Spodiopogon with two clustered clades,in which the clade of S.cotulifer,S.sibiricus,and S.formosanus was reciprocally sister to that of S.sagittifolius and S.duclouxii.These findings are instrumental in investigating the molecular taxonomy and evolutionary history of Spodiopogon.关键词
高粱族/箭叶大油芒/四分结构/序列多态性/结构变异/单系/系统发育关系Key words
andropogoneae/Spodiopogon sagittifolius/quadripartite structure/sequence polymorphism/structural variation/monophyletic/phylogenetic relationships引用本文复制引用
许超,刘倩,肖潇,刘振稳..禾本科大油芒属5个叶绿体基因组比较分析[J].草业科学,2026,43(2):350-360,11.基金项目
云南省科技人才与平台计划"云南省退化森林生态修复创新团队(202505AS350020) （202505AS350020）
