Cytotaxonomy and phylogeny in certain species ofTaxodiaceae

Schlarbaum, Scott E.; Tsuchiya, T.

doi:10.1007/bf00984578

Cited by 40 publications

(18 citation statements)

References 40 publications

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“…All species of Taxodiaceae seem to be endemic. This family has been extensively studied cytologically (Schlarbaum and Tsuchiya 1984, Hizume et al 1988, Hizume 1989. The basic chromosome number of this family is x=11.…”

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confidence: 99%

Flow Cytometric Determination of Genome Size in the Taxodiaceae, Cupressaceae sensu stricto and Sciadopityaceae.

et al. 2001

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SummaryThe genome sizes of 13 species of Taxodiaceae, 19 species of Cupressaceae s.s. and Sciadopitys verticillata were determined by flow cytometry of isolated nuclei stained with propidium iodide, using Hordeum vulgare nuclei as an internal standard. In Taxodiaceae, the genomes of Cunninghamia lanceolata (28.34 pg/2C) and Taiwania species (25.78, 26.80 pg/2C) were larger than those of other genera/species, which ranged from 19.85 to 22.87 pg/2C. In Cupressaceae s.s., genome size ranged from 20.03 to 27.93 pg/2C among 16 species. The Calocedrus species and Thujopsis had a larger genome than most other species. Sciadopitys verticillata had a large genome of 41.60 pg/2C. After comparing the diversity in genome size with previously reported cladograms constructed using nucleotide sequence data, the tendency of changes in genome size with phylogenetic differentiation is discussed.

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confidence: 99%

Flow Cytometric Determination of Genome Size in the Taxodiaceae, Cupressaceae sensu stricto and Sciadopityaceae.

et al. 2001

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“…Sequoiadendron and Metasequoia are both diploids having 22 chromosomes in their diploid genomes (2n = 22; Figs. 4 and 5) (Stebbins 1948;Schlarbaum and Tsuchiya 1984b). As in Sequoia, there is a gradual increase in chromosome length, and the smaller chromosome is half the size of longest chromosome in both Sequoiadendron and Metasequoia (Figs.…”

Section: Ploidy Levels and Karyotypesmentioning

confidence: 93%

“…Sequoiadendron has mostly metacentric chromosomes, and only one pair of small chromosomes with elongated kinetochores (Fig. 4), while Metasequoia has also mostly metacentric chromosomes, but three pairs of chromosomes with elongated kinetochores representing the nucleolar organizing (NOR) regions (Schlarbaum and Tsuchiya 1984b) (Fig. 5).…”

Section: Ploidy Levels and Karyotypesmentioning

confidence: 98%

Genetic constitution and diversity in four narrow endemic redwoods from the family Cupressaceae

Ahuja

2008

Euphytica

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The genetic constitution and diversity of four relictual redwoods are discussed in this review. These include monotypic genera of the family Cupressaceae: coast redwood (Sequoia sempervirens), giant sequoia (Sequoiadendron giganteum), dawn redwood (Metasequoia glyptostroboides), and alerce (Fitzroya cupressoides). All four species are narrow endemics, share a number of common phenotypic traits, including red wood, and are threatened species. Fossil history suggests that the ancestors of redwoods probably originated during the Cretaceous and Tertiary periods and Xourished thereafter for millions of years. Towards the end of the Tertiary period began their decline and struggle for existence that continued during the subsequent geologic upheavals and climate changes, until the survival of the presentday redwoods in the current restricted locations in the world (USA, China, and South America). Although two species, Sequoiadendron and Metasequoia, are diploids (2n = 22), and the other two are polyploids: Fitzroya a tetraploid (2n = 4x = 44), and Sequoia a hexaploid (2n = 6x = 66); they all share the same basic chromosome number x = 11. The genome size in the hexaploid Sequoia is one of the largest (31,500 MB) in the conifers, while the genome sizes of diploid Metasequoia and Sequoiadendron are about one-third (»10,000 MB) of Sequoia. Genetic diversity in the redwoods is lower than most other gymnosperms, except in Sequoia, which seems to rank near the upper quarter of the coniferous forest trees. Genomic research is sparse in the redwoods, and should be pursued for a better understanding of their genome structure, function, and adaptive genetic diversity.

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“…Chaney 1948Chaney , 1951Florin 1963 ;Momohara 1994Momohara , 2005Yu 1995 ;Yang 1999 ;LePage et al 2005 ), its contemporary natural distribution (Hu and Cheng 1948 ;Cheng and Chu 1949 ;Fu and Jin 1992 ;Leng et al 2007 ), its molecular biology and genetics (Schlarbaum and Tsuchiyu 1984 ;Kuser et al 1997 ;Chen et al 2003 ;Yang 2005 ), as well as SSRs having been used to compare the genetic diversity in the wild and the planted populations of Metasequoia in China (Li 2006 ), the fi nding of buried Metasequoia wood in Lichuan , and its ecological characteristics (Cheng and Chu 1949 ;Chu and Cooper 1950 ;Gressitt 1953 ;Williams 2005 ;Li and Ban 1989 ;You et al 2008 ). Chaney 1948Chaney , 1951Florin 1963 ;Momohara 1994Momohara , 2005Yu 1995 ;Yang 1999 ;LePage et al 2005 ), its contemporary natural distribution (Hu and Cheng 1948 ;Cheng and Chu 1949 ;Fu and Jin 1992 ;Leng et al 2007 ), its molecular biology and genetics (Schlarbaum and Tsuchiyu 1984 ;Kuser et al 1997 ;Chen et al 2003 ;Yang 2005 ), as well as SSRs having been used to compare the genetic diversity in the wild and the plan...…”

Section: Population Structure and Ecological Characteristicsmentioning

confidence: 99%

The Subtropical Vegetation of Southwestern China

Tang¹

2015

Plant and Vegetation

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Volume 11Series editor M. J.A. Werger , Utrecht , The Netherlands Plant and Vegetation is a new Springer series comprising a series of books that present current knowledge and new perspectives on world vegetation. Examining the ecology of plants and vegetation at all scales -from plant to landscape -and covering key issues such as globalization, invasive species, climate change and the dynamics of plant biodiversity, this book series draws together a wide range of material of interest to plant ecologists, vegetation scientists, and geographers around the world. The series provides a valuable resource for both graduate students and researchers in environmental and biological sciences, as well as for landscape planners and policy makers involved in land-use and restoration projects at local, regional and international levels.More information about this series at

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Cytotaxonomy and phylogeny in certain species ofTaxodiaceae

Cited by 40 publications

References 40 publications

Flow Cytometric Determination of Genome Size in the Taxodiaceae, Cupressaceae sensu stricto and Sciadopityaceae.

Flow Cytometric Determination of Genome Size in the Taxodiaceae, Cupressaceae sensu stricto and Sciadopityaceae.

Genetic constitution and diversity in four narrow endemic redwoods from the family Cupressaceae

The Subtropical Vegetation of Southwestern China

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