Relationships and Hybridization among Smilax china and Its Affinities: Evidence from Allozyme Data

Wang, Aili; Chen, Yeye; Chen, Guangchun; Lee, Dong Kun; Fu, Chengxin

doi:10.1007/s10528-008-9155-9

Cited by 2 publications

(2 citation statements)

References 36 publications

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“…On the basis of allele frequencies, we can calculate some of the main within-population genetic diversity parameters, including P (percentage of polymorphic loci), A (mean number of alleles per locus), and He (expected heterozygosity), but not Ho (observed heterozygosity). Examples using this approach include the hexaploid Sequoia sempervirens [54] and the Chinese Smilax polyploid series [55]. For the second approximation, we treated the allozyme data as dominant markers.…”

Section: Allozyme Extraction and Analysesmentioning

confidence: 99%

Genesis, Evolution, and Genetic Diversity of the Hexaploid, Narrow Endemic Centaurea tentudaica

et al. 2021

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Within the genus Centaurea L., polyploidy is very common, and it is believed that, as to all angiosperms, it was key in the history of its diversification and evolution. Centaurea tentudaica is a hexaploid from subsect. Chamaecyanus of unknown origin. In this study, we examined the possible autopolyploid or allopolyploid origin using allozymes and sequences of three molecular markers: nuclear-ribosomic region ETS, and low-copy genes AGT1 and PgiC. We also included three species geographically and morphologically close to C. tentudaica: C. amblensis, C. galianoi, and C. ornata. Neighbor-Net and Bayesian analyses show a close relationship between C. amblensis and C. tentudaica and no relationship to any of the other species, which suggest that C. tentudaica is an autopolyploid of C. amblensis. Allozyme banding pattern also supports the autopolyploidy hypothesis and shows high levels of genetic diversity in the polyploid, which could suggest multiple origins by recurrent crosses of tetraploid and diploid cytotypes of C. amblensis. Environmental niche modeling was used to analyze the distribution of the possible parental species during the present, Last Glacial Maximum (LGM), Last Interglacial Period (LIG), and Penultimate Glacial Maximum (PGM) environmental conditions. Supporting the molecular suggestions that C. tentudaica originated from C. amblensis, environmental niche modeling confirms that past distribution of C. amblensis overlapped with the distribution of C. tentudaica.

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Section: Allozyme Extraction and Analysesmentioning

confidence: 99%

Genesis, Evolution, and Genetic Diversity of the Hexaploid, Narrow Endemic Centaurea tentudaica

et al. 2021

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“…Its plastid genome is unquestionably distinct from any other sampled species, thereby supporting its status as a new species. If it was a hybrid, a phenomenon that is rare in Smilax and only known within the S. china complex (Wang & al., 2008), then we would have expected it to share cpDNA sequences with its maternal parent; it does not.…”

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confidence: 99%

Smilax ligneoriparia sp. nov.: A link between herbaceous and woody Smilax (Smilacaceae) based on morphology, karyotype and molecular phylogenetic data

Chen

et al. 2011

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A population of Smilax found in southeastern Yunnan was originally considered to be a local race of S. riparia with unusual woody, perennial stems, but its status as a distinct species is supported here by morphology, karyology, and molecular phylogenetics. This new species, Smilax ligneoriparia C.X. Fu & P. Li, shares several unique morphological characteristics with S. riparia, such as ovate herbaceous leaves and smooth stem lacking prickles, but its stem is "woody" and its chromosome number is 2n = 32, unlike that of S. riparia (2n = 30). Molecular phylogenetic analysis also confirms that it is distinct, but tentatively supports the position of this new taxon as sister to a clade of woody Asian species, which in turn is sister to the herbaceous, annually emergent Smilax clade. Herbarium specimens show that S. ligneoriparia has been collected in at least three locations in southeastern Yunnan and southern Zhejiang Provinces, but we suspect that the population from Xichou, occurring on limestone mountain slopes at 1550–1600 m, may be the only extant population.

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Relationships and Hybridization among Smilax china and Its Affinities: Evidence from Allozyme Data

Cited by 2 publications

References 36 publications

Genesis, Evolution, and Genetic Diversity of the Hexaploid, Narrow Endemic Centaurea tentudaica

Genesis, Evolution, and Genetic Diversity of the Hexaploid, Narrow Endemic Centaurea tentudaica

Smilax ligneoriparia sp. nov.: A link between herbaceous and woody Smilax (Smilacaceae) based on morphology, karyotype and molecular phylogenetic data

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