Plastome characterization and comparative analyses of wild crabapples (Malus baccata and M. toringo): insights into infraspecific plastome variation and phylogenetic relationships

Myong Suk Cho, Jin Hyeong Kim, Takayuki Yamada, Masayuki Maki, Seung Chul Kim

研究成果: Article査読

2 被引用数 (Scopus)

抄録

Malus baccata (L.) Borkh. and Malus toringo (Siebold) Siebold ex de Vriese of the genus Malus Mill. (Rosaceae) are wild crabapples occurring in temperate East Asia. Despite their horticultural importance as ornamental trees and the natural resources in apple breeding, their phylogenetic relationships have never been determined clearly owing to lack of resolution in previous studies. We characterized four complete chloroplast genomes of these two species and conducted various phylogenomic analyses comparatively to the previously reported plastomes of other wild Malus species. They were highly conserved in genomic structures and gene contents, containing 129 genes including 84 protein-coding genes, eight rRNA genes, and 37 tRNA genes. Phylogenetic analysis of 23 representative Malus plastomes did not support the current classification of the major sections in Malus, revealing non-monophylies. The plastomes of M. toringo revealed two chloroplast types corresponding to their geographic distribution; M. toringo from China was more closely related to other sympatric species, while two conspecific M. toringo from Japan and Korea were in a sister relationship with M. baccata from Korea. We identified one positively selected gene (ndhD) and seven mutation hotspots (trnK-rps16, trnR-atpA, petN-psbM, trnT-psbD, psbZ-trnG, ndhC-trnV, and ycf1) and variable SSRs as potential useful plastid markers.

本文言語English
論文番号41
ジャーナルTree Genetics and Genomes
17
5
DOI
出版ステータスPublished - 2021 10

ASJC Scopus subject areas

  • 林業
  • 分子生物学
  • 遺伝学
  • 園芸学

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