南京林业大学学报（自然科学版）2024，Vol.48Issue(4)：25-36,12.DOI:10.12302/j.issn.1000-2006.202205003
蔷薇科花楸属白毛系的系统发生分析
Phylogenetic analysis of Sorbus ser.Folgnerianae(Rosaceae)
摘要
Abstract
[Objective]To test whether Sorbus ser.Folgnerianae is a monophyletic group and to reconstruct the phylogenetic relationship among three species,S.dunnii,S.folgneri and S.hemsleyi.[Method]Morphological characteristics of leaves,flowers and fruits of Ser.Folgnerianae species were compared through specimen examination and field observation.Phylogenetic relationships within Ser.Folgnerianae were analyzed based on the comparison of the plastid genomes,repeat sequences,sequence variations of the five plastid genomes newly sequenced including three Ser.Folgnerianae species and S.megalocarpa from Sect.Aria,together with other plastid genomes available in this genus,using representatives of related genera in Rosaceae and Barbeya oleoides(Barbeyaceae)as the outgroups.[Result]Species of Ser.Folgnerianae can be easily distinguished from each other in the number of styles,color of anthers,fruit morphology and the persistence of calyx.Plastid genomes of five samples have a similar structure,gene content and organization.This sizes of plastid genomes range from 159 898 to 160 755 bp,with the GC contain range between 36.4%and 36.6%.All plastid genomes contain 113 unique genes(79 protein-coding genes,30 tRNA genes and four ribosomal RNA genes).The IR region has two pseudogenes,rps 19 Ψand ycf 1Ψ,with different extension lengths.48-54 simple sequence repeats(SSRs),36-49 long repeats sequences(LRSs)and 20 highly variable regions in the noncoding regions are identified as the most promising potentially variable makers for population genetics,species delimitation and phylogenetic studies.Phylogenetic analyses under ML/BI indicated that Sorbus is polyphyletic and the six sections within it are all monophyletic.Although,three sampled species of Ser.Folgnerianae are clustered in one group,S.Alnifolia of Ser.Alnifolia is more closely related to S.dunnii and S.folgneri than S.hemsleyi.[Conclusion]Sorbus ser.Folgnerianae is not monophyletic.Morphological characteristics and plastid genome analysis are effective in understanding the phylogenetic relationship in Ser.Folgnerianae.关键词
花楸属/形态特征/质体基因组/系统发生Key words
Sorbus/morphology/plastid genome/phylogeny分类
农业科技引用本文复制引用
马建慧,陈昕,耿礼阳,汤晨茜,魏雪妍..蔷薇科花楸属白毛系的系统发生分析[J].南京林业大学学报（自然科学版）,2024,48(4):25-36,12.基金项目
江苏省自然科学基金项目(BK20141472) （BK20141472）
江苏高校优势学科建设工程资助项目(PAPD). （PAPD）
