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Morphological distinctiveness of Ligularia tongolensis and L. cymbulifera is maintained between habitats despite bidirectional and asymmetrical introgression in multiple hybrid zones
Hu,Li; Yang,Rui; Yang,Guo-Qian; Sun,Gui-Ling; Gong,Xun
2021
Source PublicationJOURNAL OF SYSTEMATICS AND EVOLUTION
ISSN1674-4918
AbstractNatural hybridization is a crucial evolutionary process and a long-standing topic of study in evolutionary biology. Hybrid zones, where two congeneric species interact, can provide insight into the process of natural hybridization, especially with respect to how taxon diversity is maintained. In this study, we used double digest restriction-site associated DNA sequencing technology (ddRAD-seq) to examine genetic structure and estimate introgression in four hybrid zones of Ligularia tongolensis and Ligularia cymbulifera. Our analysis demonstrated that parental species were highly differentiated, whereas pairwise F-ST between parents and their hybrids was low, indicating that sympatric sites can form hybrid zones. As most F-1 hybrid individuals were observed within these zones, our finding also implied the presence of substantial barriers to interbreeding. Furthermore, some individuals that possessed the typical morphology of the parental species belonged to the F-1 generation. Genomic clines analysis revealed that a large fraction of single nucleotide polymorphisms (SNPs) deviated from a model of neutral introgression in the four hybrid zones, and most SNPs exhibited selection favoring the L. cymbulifera genotype. Bidirectional but asymmetric introgression was revealed as evident in the four hybrid zones. Habitat differences between the four hybrid zones may affect isolation barriers between both species. Taken together, these findings suggest that where incomplete reproductive barriers allow natural hybridization, the introgression between species generates rich genetic recombination that contributes to the fast adaptation and diversification of the widespread Ligularia in the Hengduan Mountains Region (HMR).
KeywordddRAD hybrid zones Ligularia natural hybridization reproductive isolation REPRODUCTIVE ISOLATION NATURAL HYBRIDIZATION HENGDUAN MOUNTAINS POPULATION-STRUCTURE ASTERACEAE YUNNAN DIVERSIFICATION PHYLOGEOGRAPHY SPECIATION VELLEREA
DOI10.1111/jse.12756
WOS IDWOS:000685415200001
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Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/73672
Collection中国科学院昆明植物研究所
Affiliation1.Chinese Acad Sci, Kunming Inst Bot, CAS Key Lab Plant Div & Biogeog East Asia, Kunming 650201, Yunnan, Peoples R China
2.Chinese Acad Sci, Kunming Inst Bot, Key Lab Econ Plants & Biotechnol, Kunming 650201, Yunnan, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Kunming Inst Bot, Germplasm Bank Wild Species, Kunming 650201, Yunnan, Peoples R China
5.Henan Univ, Inst Plant Stress Biol, HPC Ctr Bioinformat Platform, Dept Biol,State Key Lab Cotton Biol, Kaifeng 475001, Henan, Peoples R China
Recommended Citation
GB/T 7714
Hu,Li,Yang,Rui,Yang,Guo-Qian,et al. Morphological distinctiveness of Ligularia tongolensis and L. cymbulifera is maintained between habitats despite bidirectional and asymmetrical introgression in multiple hybrid zones[J]. JOURNAL OF SYSTEMATICS AND EVOLUTION,2021.
APA Hu,Li,Yang,Rui,Yang,Guo-Qian,Sun,Gui-Ling,&Gong,Xun.(2021).Morphological distinctiveness of Ligularia tongolensis and L. cymbulifera is maintained between habitats despite bidirectional and asymmetrical introgression in multiple hybrid zones.JOURNAL OF SYSTEMATICS AND EVOLUTION.
MLA Hu,Li,et al."Morphological distinctiveness of Ligularia tongolensis and L. cymbulifera is maintained between habitats despite bidirectional and asymmetrical introgression in multiple hybrid zones".JOURNAL OF SYSTEMATICS AND EVOLUTION (2021).
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