Evolutionary origin of a tetraploid <i>Allium</i> species on the Qinghai–Tibet Plateau

Li, Minjie; Zheng, Zeyu; Liu, Juncheng; Yang, Yongzhi; Ren, Guangpeng; Ru, Dafu; Zhang, Shangzhe; Du, Xin; Ma, Tao; Milne, Richard I.; Liu, Jianquan

doi:10.1111/mec.16168

Cited by 15 publications

(20 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…cyathophorum ) and one tetraploid ( A . tetraploideum ) species are allopatrically distributed in the QTP sl (M. J. Li et al ., 2021). Based on population genomic data from specific‐locus amplified fragment sequencing (SLAF‐seq), gene flow was frequently detected during historical divergence of the two diploid species, and a complex hybridization history involved in the allopolyploid origin of A .…”

Section: Species Divergence With Gene Flowmentioning

confidence: 99%

“…farreri and A . cyaphophorum , and the other an allotetraploid derived from hybridization of an extinct diploid and one of the two extant diploids (M. J. Li et al ., 2021). These two case studies suggest that similar analyses may shed light on other allopolyploid species with repeated polyploidization events on the QTP sl .…”

Section: Hybrids and Hybrid Polyploidizationmentioning

confidence: 99%

See 1 more Smart Citation

Species divergence with gene flow and hybrid speciation on the Qinghai–Tibet Plateau

Wang

et al. 2022

New Phytologist

Self Cite

View full text Add to dashboard Cite

The Qinghai-Tibet Plateau (QTP) sensu lato (sl ), comprising the platform, the Himalaya and the Hengduan Mountains, is characterized by a large number of endemic plant species. This evolutionary cradle may have arisen from explosive species diversification because of geographic isolation. However, gene flow has been widely detected during the speciation processes of all groups examined, suggesting that natural selection may have also played an important role during species divergence in this region. In addition, natural hybrids have been recovered in almost all species-rich genera. This suggests that numerous species in this region are still 'on the speciation pathway to complete reproductive isolation (RI)'. Such hybrids could directly develop into new species through hybrid polyploidization and homoploid hybrid speciation (HHS). HHS may take place more easily than previously thought through alternate inheritance of alleles of parents at multiple RI loci. Therefore, isolation, selection and hybridization could together have promoted species diversification of numerous plant genera on the QTP sl. We emphasize the need for identification and functional analysis of alleles of major genes for speciation, and especially encourage investigations of parallel adaptive divergence causing RI across different lineages within similar but specific habitats in this region.

show abstract

Section: Species Divergence With Gene Flowmentioning

confidence: 99%

Section: Hybrids and Hybrid Polyploidizationmentioning

confidence: 99%

Species divergence with gene flow and hybrid speciation on the Qinghai–Tibet Plateau

Wang

et al. 2022

New Phytologist

Self Cite

View full text Add to dashboard Cite

show abstract

“…Therefore, C. putoensis may originate from the hybrid polyploidization between C. mianningensis and C. tschonoskii. Therefore, C. putoensis remains an independently evolving lineage because the allopolyploidization immediately leads to direct postzygotic isolation ( Li et al 2021 ). However, because of the small population (one individual), rare sexual recombination, tree life longevity and early speciation stage, multiple ITS copies from both parents have not experienced the concerted evolution into a single sequence and not accumulated the species-specific mutations.…”

Section: Discussionmentioning

confidence: 99%

Delimiting 33 Carpinus (Betulaceae) species with a further phylogenetic inference

Dong

Zhang

et al. 2022

AoB PLANTS

Self Cite

View full text Add to dashboard Cite

Carpinus (Betulaceae) has approximately 52 species distributed in the Northern Hemisphere, with many species of Carpinus found in China. However, the species boundaries and phylogenetic relationships remain poorly understood. This study reported ITS sequences for 225 individuals of 33 Carpinus species, mainly from China. We also included eight Ostrya species in our analyses, the closely related sister group of Carpinus. We aimed to delimit these species based on ITS sequences and clarify their phylogenetic relationships by constructing tree-like topology and networks at population level. We found that only 17 of 33 species could be delimited from the closely related ones based on species-specific mutations in ITS sequence variation, including all species of sect. Distegocarpus, and sect. Carpinus subsect. Carpinus. Carpinus subsect. Carpinus contained two endangered species, although one seemed to be a recently originated allopolyploid species with genetic additivity from two likely parents in the ITS sequence variation. 16 species of sect. Carpinus subsect. Polyneurae were classified into three species complexes, in each of which two or more could be not distinguished from each other. The closely related species of these complexes may still diverge at the early stage without genetic distinction in the nuclear ITS sequences because of too short of divergence time and frequent gene flow. Otherwise, some species may be established based on the intraspecific variations without genetic bases for an independently evolving unit.

show abstract

“…The species barrier within Rhododendron is very fragile and numerous natural hybridization events have been detected (Ma et al, 2010;Milne et al, 1999Milne et al, , 2010Yan et al, 2017Yan et al, , 2019Zha et al, 2008Zha et al, , 2010Zhang et al, 2007;Zheng et al, 2021).…”

Section: Intensive Sampling Produces High Resolution But Reveals Phyl...mentioning

confidence: 99%

“…Moreover, conflict among these studies likely reflects reticulate evolution, which might in turn have contributed to poor resolution of some key nodes. Numerous Rhododendron species occur sympatrically, and considerable interspecific hybridization/introgression events occur among them (Ma et al, 2010;Milne and Abbott, 2008;Milne et al, 1999Milne et al, , 2003Yan et al, 2017;Zhang et al, 2007;Zheng et al, 2021). There are hence two particular challenges to generating a well resolved and accurate phylogeny for Rhododendron: recent and rapid speciation, and reticulate evolution, both of which raise a challenge for phylogenetic inference and species identification in Rhododendron, whether based on morphology or molecular data (e.g.…”

Section: Introductionmentioning

confidence: 99%

Resolution, conflict and rate shifts: insights from a densely sampled plastome phylogeny forRhododendron(Ericaceae)

Zhu

et al. 2022

Annals of Botany

View full text Add to dashboard Cite

Background and Aims Rhododendron is a species-rich and taxonomically challenging genus due to recent adaptive radiation and frequent hybridization. A well resolved phylogenetic tree is conducive to understanding the diverse history of Rhododendron in the Himalaya-Hengduan Mountains where the genus is most diverse. Methods We reconstructed the phylogeny based on plastid genomes with broad taxon sampling, covering 161 species representing all eight subgenera and all 12 sections, including approximate 45% of the Rhododendron species native to the Himalaya-Hengduan Mountains. We compared this phylogeny with nuclear phylogenies to elucidate reticulate evolution events and clarify relationships at all levels within the genus. We also estimated the timing and diversification history of Rhododendron, especially the two species-rich subgenera Rhododendron and Hymenanthes that comprise >90% of Rhododendron species in the Himalaya-Hengduan Mountains. Key Results The full plastid dataset produced a well resolved and supported phylogeny of Rhododendron. We identified 13 clades that were almost always monophyletic across all published phylogenies. The conflicts between nuclear and plastid phylogenies strongly suggested that reticulation events may have occurred in the deep lineage history of the genus. Within Rhododendron, subgenus Therorhodion diverged first at 56 Mya, then a burst of diversification occurred from 23.8 to 17.6 Mya, generating 10 lineages of the component 12 clades of core Rhododendron. Diversification in subgenus Rhododendron accelerated c. 16.6 Mya and then became fairly continuous. Conversely, Hymenanthes diversification was slow at first, then accelerated very rapidly around 5 Mya. In the Himalaya-Hengduan Mountains, subgenus Rhododendron contained one major clade adapted to high altitudes and another to low altitudes, whereas most clades in Hymenanthes contained both low- and high-altitude species, indicating greater ecological plasticity during its diversification. Conclusions The 13 clades proposed here may help identify specific ancient hybridisation events. This study will aid to establish a stable and reliable taxonomic framework for Rhododendron, and help to provide insight into what drove its diversification and ecological adaption. Denser sampling of taxa, examining both organelle and nuclear genomes, is needed to better understand the divergence and diversification history of Rhododendron.

show abstract

Evolutionary origin of a tetraploid Allium species on the Qinghai–Tibet Plateau

Cited by 15 publications

References 71 publications

Species divergence with gene flow and hybrid speciation on the Qinghai–Tibet Plateau

Species divergence with gene flow and hybrid speciation on the Qinghai–Tibet Plateau

Delimiting 33 Carpinus (Betulaceae) species with a further phylogenetic inference

Resolution, conflict and rate shifts: insights from a densely sampled plastome phylogeny forRhododendron(Ericaceae)

Contact Info

Product

Resources

About