Analysis of ITS of the rDNA to infer phylogenetic relationships among Vietnamese Citrus accessions

作者：Kyndt Tina; Tran Nhan Dung; Goetghebeur Paul; Ha Thanh Toan; Gheysen Godelieve^*

来源：Genetic Resources and Crop Evolution, 2010, 57(2): 183-192.

DOI：10.1007/s10722-009-9460-0

• Citrus
• Rutaceae
• Phylogeny
• ITS of the rDNA
• Vietnam

This study focused on clarifying phylogenetic relationships among Citrus accessions from Vietnam. Our phylogenetic analysis based on nucleotide sequences from the ITS of the ribosomal DNA included 69 accessions belonging to Citrus and related (sub)genera. Maximum parsimony and Bayesian analysis confirmed a clear separation of the three 'true' Citrus species (C. medica, C. maxima and C. reticulata). Confirming recent taxonomic revisions, Fortunella, Poncirus trifoliata and Citrus hystrix are clustered among the accessions of subgenus Citrus. C. x sinensis accessions revealed a close evolutionary relationship to either C. maxima or C. reticulata, thereby confirming their involvement in its hybrid origin. Also, some other hybrid taxa and their proposed parental species were investigated and their origin could in some cases be confirmed using the ITS sequence data.

• 出版日期2010-2