期刊
FRONTIERS IN PLANT SCIENCE
卷 13, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2022.865606
关键词
Lilium species; lily cultivars; plastid genome; phylogenetic relationship; maternal origin
资金
- National Key Research and Development Program of China [2020YFD1000400]
- Major Science and Technology Project of Yunnan Provincial Department of Science and Technology [2019ZG006]
- CAS Pioneer Hundred Talents Program
Lilies are globally important ornamental flowers with a wide variety of wild species and cultivars. In this study, the plastome sequences of major Lilium species and cultivars were analyzed to reveal the genetic relationships within Lilium and determine the maternal origins of cultivars. The results provide important insights for the classification and origin of cultivars in Lilium.
Lilies are one of the most important ornamental flowers worldwide with approximately 100 wild species and numerous cultivars, but the phylogenetic relationships among wild species and their contributions to these cultivars are poorly resolved. We collected the major Lilium species and cultivars and assembled their plastome sequences. Our phylogenetic reconstruction using 114 plastid genomes, including 70 wild species representing all sections and 42 cultivars representing six hybrid divisions and two outgroups, uncovered well-supported genetic relationships within Lilium. The wild species were separated into two distinct groups (groups A and B) associated with geographical distribution, which further diversified into eight different clades that were phylogenetically well supported. Additional support was provided by the distributions of indels and single-nucleotide variants, which were consistent with the topology. The species of sections Archelirion, Sinomartagon III, and Leucolirion 6a and 6b were the maternal donors for Oriental hybrids, Asiatic hybrids, Trumpet hybrids, and Longiflorum hybrids, respectively. The maternal donors of the OT hybrids originated from the two sections Archelirion and Leucolirion 6a, and LA hybrids were derived from the two sections Leucolirion 6b and Sinomartagon. Our study provides an important basis for clarifying the infrageneric classification and the maternal origin of cultivars in Lilium.
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