Morphological and molecular evidence for natural hybridization between Sorbus pohuashanensis and S. discolor (Rosaceae)  

作　　者：Yuxia Wu Xuedan Yu Wei Tang Wenhua Yang Qidi Fu Yongqi Zheng Chuanhong Zhang 

机构地区：[1]State Key Laboratory of Tree Genetics and Breeding,Research Institute of Forestry,Chinese Academy of Forestry,Beijing 100091,People’s Republic of China [2]Beijing Waiyan Online Digital Technology Co.,Ltd,Beijing 100081,People’s Republic of China [3]Huabanlv Nature Enlightenment Education Technology Co.,Ltd,Beijing 100010,People’s Republic of China

出　　处：《Journal of Forestry Research》2024年第4期189-201,共13页林业研究（英文版）

基　　金：This study was supported by the National Natural Science Foundation of China,Grant/Award Number:32071779.

摘　　要：In overlapping distribution areas of Sorbus pohuashanensis and S.discolor in North China(Mount Tuoliang,Mount Xiling and Mount Baihua),Sorbus indi-viduals were found with pink fruit,which have never been recorded for the flora of China.Fourteen morphological characters combined with four chloroplast DNA markers and internal transcribed spacer(ITS)were used to analyze the origin of the Sorbus individuals with pink fruits and their relationship to S.pohuashanensis and S.discolor.PCA,SDA and one-way(taxon)ANOVA of morphological characters provided convincing evidence of the hybrid ori-gin of Sorbus individuals with pink fruits based on a novel morphological character and many intermediate characters.Haplotype analysis based on four cpDNA markers showed that either S.pohuashanensis or S.discolor were maternal parents of Sorbus individuals with pink fruits.Incongru-ence of the position of Sorbus individuals with pink fruits between cpDNA and ITS in cluster trees supported by DNA sequence comparative analysis,implying former hybridiza-tion events between S.pohuashanensis and S.discolor.Mul-tiple hybridization events between S.pohuashanensis and S.discolor might have contributed to the generation of Sorbus individuals with pink fruits.This study has provided insights into hybridization between species of the same genus in sympatric areas,which is of great significance for the study of interspecific hybridization.

关 键 词：HYBRIDIZATION ITS Chloroplast DNA Morphological characters SORBUS 

分 类 号：S792.25[农业科学—林木遗传育种]