Biosystematic study ofSedum L. SubgenusAizoon (Crassulaceae)

Amano, Makoto

doi:10.1007/bf02488412

Cited by 7 publications

(6 citation statements)

References 12 publications

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“…Aizoon ; Fröderström (1931) included all but one species ( P. hybridus ), either as a subspecies or synonym in P. aizoon . We fully agree that large-scale, comprehensive biosystematics studies of natural populations are required to properly understand morphological and cytological variation ( Amano, 1990 ; Amano and Ohba, 1992 ; Hart and Bleij, 2003 ). However, our current study provides some insights into the species boundaries in subg.…”

Section: Discussionsupporting

confidence: 61%

“…In contrast, P. aizoon var. floribundus sensu Japan (= P. kamtschaticus sensu Korea, China, and Russia) is tetraploid (2 n = 32), hexaploid (2 n = 48), and octoploid (2 n = 64) ( Ohba, 1982 ; Amano, 1990 ; Amano and Ohba, 1992 ). Therefore, it is plausible that P. kamtschaticus sensu Japan ( n = 16) is conspecific to P. aizoon var.…”

Section: Discussionmentioning

confidence: 99%

“…The genus Phedimus Rafinesque comprises approximately 20 species worldwide and represents a lineage distinct from the more broadly circumscribed "catch-all" genus Sedum (Ohba et al, 2000;Mayuzumi and Ohba, 2004). Phedimus species are phenotypically like Sedum species, but morphological characteristics (i.e., welldeveloped rhizomes and flattened leaves with dentate margins) and molecular phylogenetic studies strongly support the monophyly of Phedimus and its segregation from Sedum sensu stricto (Hart, 1995; polyploidy and aneuploidy, the circumscription of species and interspecific relationships within Phedimus in East Asia has been problematic (Uhl and Moran, 1972;Chung and Kim, 1989;Amano, 1990;Amano and Ohba, 1992). Individual species within Phedimus show diverse morphologies that often intergrade with other recognized taxa, blurring species boundaries and resulting in the recognition of species complexes and polymorphic species with many varieties (Chung and Kim, 1989;Amano, 1990).…”

Section: Introductionmentioning

confidence: 98%

“…Aizoon in East Asia is restricted to certain countries, such as Russia ( P. litoralis and P. sichotensis ), Japan ( P. sikokianus ), and China ( P. odontophyllus , P. floriferus , and P. yangshanicus ). Owing to a lack of synapomorphic characters for species, highly variable morphologies within species, and extensive polyploidy and aneuploidy, the circumscription of species and interspecific relationships within Phedimus in East Asia has been problematic ( Uhl and Moran, 1972 ; Chung and Kim, 1989 ; Amano, 1990 ; Amano and Ohba, 1992 ). Individual species within Phedimus show diverse morphologies that often intergrade with other recognized taxa, blurring species boundaries and resulting in the recognition of species complexes and polymorphic species with many varieties ( Chung and Kim, 1989 ; Amano, 1990 ).…”

Section: Introductionmentioning

confidence: 99%

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Plastome-based backbone phylogeny of East Asian Phedimus (Subgenus Aizoon: Crassulaceae), with special emphasis on Korean endemics

Kim

Yang

et al. 2023

Front. Plant Sci.

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Although the monophyly of Phedimus has been strongly demonstrated, the species relationships among approximately 20 species of Phedimus have been difficult to determine because of the uniformity of their floral characteristics and extreme variation of their vegetative characters, often accompanied by high polyploid and aneuploid series and diverse habitats. In this study, we assembled 15 complete chloroplast genomes of Phedimus species from East Asia and generated a plastome-based backbone phylogeny of the subgenus Aizoon. As a proxy for nuclear phylogeny, we reconstructed the nuclear ribosomal DNA internal transcribed spacer (nrDNA ITS) phylogeny independently. The 15 plastomes of subg. Aizoon were highly conserved in structure and organization; hence, the complete plastome phylogeny fully resolved the species relationships with strong support. We found that P. aizoon and P. kamtschaticus were polyphyletic and morphologically distinct or ambiguous species, and they most likely evolved from the two species complex. The crown age of subg. Aizoon was estimated to be 27 Ma, suggesting its origin to be in the late Oligocene; however, the major lineages were diversified during the Miocene. The two Korean endemics, P. takesimensis and P. zokuriensis, were inferred to have originated recently during the Pleistocene, whereas the other endemic, P. latiovalifolium, originated in the late Miocene. Several mutation hotspots and seven positively selected chloroplast genes were identified in the subg. Aizoon.

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Section: Discussionsupporting

confidence: 61%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Plastome-based backbone phylogeny of East Asian Phedimus (Subgenus Aizoon: Crassulaceae), with special emphasis on Korean endemics

Kim

Yang

et al. 2023

Front. Plant Sci.

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“…Hybrids originating from wild species of the genus Phedimus have been reported in Korean taxa [18,19]. In addition, various hybrid plants have been reported in the subspecies P. aizoon, and it has caused a lot of confusion in the recognition of Japanese species [20]. This is particularly the case for P. kamtschaticus and P. aizoon, which are generally identified by their leaf type.…”

Section: Hybridization Leading To Discordance On the Phylogenetic Treementioning

confidence: 99%

A Molecular Phylogenetic Study of the Genus Phedimus for Tracing the Origin of “Tottori Fujita” Cultivars

Han

Kim

2020

Plants

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It is very important to confirm and understand the genetic background of cultivated plants used in multiple applications. The genetic background is the history of crossing between maternal and paternal plants to generate a cultivated plant. If the plant in question was generated from a simple origin and not complicated crossing, we can easily confirm the history using a phylogenetic tree based on molecular data. This study was conducted to trace the origin of “Tottori Fujita 1gou” and “Tottori Fujita 2gou”, which are registered as cultivars originating from Phedimus kamtschaticus. To investigate the phylogenetic position of these cultivars, the backbone tree of the genus Phedimus needed to be further constructed because it retains inarticulate phylogenetic relationships among the wild species. We performed molecular phylogenetic analysis for P. kamtschaticus, Phedimus takesimensis, Phedimus aizoon, and Phedimus middendorffianus, which are assumed as the species of origin for “Tottori Fujita 1gou” and “Tottori Fujita 2gou”. The molecular phylogenetic tree based on the internal transcribed spacer (ITS) and psbA-trnH sequences showed the monophyly of the genus Phedimus, with P. takesimensis forming a single clade. However, P. kamtschaticus and P. aizoon were scattered in the tree. It was verified that “Tottori Fujita 1gou” and “Tottori Fujita 2gou” were embedded in a clade with P. takesimensis and not P. kamtschaticus. Therefore, origination from P. takesimensis was strongly supported. Based on these results, molecular phylogenetic analysis is suggested as a powerful tool for clearly tracing the origin of cultivated plants.

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