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Mitochondrial Genome Analysis of Myricaria laxiflora, a Protected Endangered Plant

PHYTON-INTERNATIONAL JOURNAL OF EXPERIMENTAL BOTANY 2024年第8期93卷 1981-1993页

作者： Wang, Chaoying Ma, Lihui Xie, Yingzan Ding, Bo Huang, Jingsi Wang, Qian Chongqing City Management Coll Sch Culture & Tourism Chongqing 401331 Peoples R China Chongqing Acad Forestry Sci Chongqing Urban Ecosyst Natl Positioning Observat Chongqing 400036 Peoples R China Southwest Univ Coll Agron & Biotechnol Chongqing 400715 Peoples R China Southwest Univ Sch Life Sci Key Lab Ecoenvironm Three Gorges Reservoir Reg Minist Educ Chongqing 400715 Peoples R China

Myricaria laxiflora, which grows along the Yangtze River in China, holds ornamental, ecological, and medicinal value. However, its wild population is threatened and currently designated protected as a national priority. The present research was the first to sequence and assemble M. laxiflora's mitochondrial genome and examine its structural characteristics and phylogenetic relationships with other sequenced Caryophyllales species. The mitochondrial double-stranded closed-ring genome of M. laxiflora was found to be 389,949 bp in length, containing numerous repetitive sequences and RNA editing sites, with 34 protein encoding, 21 tRNA, and 3 rRNA genes. Although there are 22 fragments in the mitochondrial genome of M. laxiflora that are homologous to its chloroplast genome, they are incomplete gene fragments. Phylogenetic analysis demonstrated evolutionary associations with related populations and was in agreement with findings on the chloroplast genome. These findings not only lay a foundation for its preservation but also offer valuable insights for evolutionary analysis and plant breeding research.

关键词： Myricaria laxiflora fl ora mitochondrial genome phylogenetic relationship ALGORITHM PROGRAM

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