种子2026，Vol.45Issue(7)：51-61,71,12.DOI:10.16590/j.cnki.1001-4705.2026.07.051
4种橡胶树叶绿体基因组密码子偏好性分析
Analysis of Codon Usage Bias in the Chloroplast Genomes of 4 Varieties of Hevea brasiliensis
摘要
Abstract
To investigate the codon usage bias and its influencing factors in the chloroplast genomes of Hevea brasiliensis,the chloroplast genome codon usage bias of 4 Hevea brasiliensis varieties[Hevea brasiliensis,Hevea nitida,Hevea benthamiana and Hevea camargoana]was analyzed.The results showed that neutrality plot and ENC-plot analyses indicated that the chloroplast codon usage bias of the 4 Hevea brasiliensis varieties was influenced by both mutation pressure and natural selection,with natural selection exerting a greater effect on codon usage bias than mutation pressure.PR2-plot analysis revealed that the frequency of base T was higher than that of A,and the frequency of G was higher than that of C at the third codon position in the 4 Hevea brasiliensis varieties,suggesting a certain selective preference at the third codon position in the chloroplast genomes of these 4 Hevea brasiliensis varieties.This indicates that the codon usage bias of the 4 Hevea brasiliensis varieties is not solely determined by mutation but is also jointly regulated by multiple factors,including natural selection.The study demonstrated that natural selection is the primary factor driving codon usage bias in the chloroplast genomes of the 4 Hevea brasiliensis varieties,while mutation pressure is a seconda-ry factor.A total of 14 optimal codons were identified in each of the 4 Hevea brasiliensis varieties,with the majority of their third-position bases being A/U.关键词
橡胶树/叶绿体基因组/密码子偏好性/最优密码子Key words
Hevea brasiliensis/chloroplast genome/codon usage bias/optimal codon分类
农业科技引用本文复制引用
邱俊超,杞美军,王步天,曲鹏,葛宇,杜华波..4种橡胶树叶绿体基因组密码子偏好性分析[J].种子,2026,45(7):51-61,71,12.基金项目
国家自然科学基金(32560522) （32560522）
云南省黄华孙专家工作站项目(202305AF150125) （202305AF150125）
国家天然橡胶产业技术体系普洱综合试验站(CARS-33-YN4) （CARS-33-YN4）
2024年大学生创新创业训练计划(S202410676056) （S202410676056）
孟连县农民院士科技服务站(无项目编号) （无项目编号）
云南省重点研发计划(202503AS090007) （202503AS090007）
