Nuclear DNA Content of 26 Orchid (Orchidaceae) Genera with Emphasis onDendrobium

Jones, W. E.; Kuehnle, Adelheid R.; Arumuganathan, K.

doi:10.1006/anbo.1998.0664

Cited by 43 publications

(23 citation statements)

References 12 publications

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“…(); the GS for Peristeria elata Hook., 2C=9.34, was taken from Jones et al . (); and for Oncidium cheirophorum Rchb.f., 2n=56, from Sinoto () and Tanaka & Kamemoto ().…”

Section: Methodsmentioning

confidence: 99%

Karyotype diversity and genome size variation in Neotropical Maxillariinae orchids

et al. 2017

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Orchidaceae is a widely distributed plant family with very diverse vegetative and floral morphology, and such variability is also reflected in their karyotypes. However, since only a low proportion of Orchidaceae has been analysed for chromosome data, greater diversity may await to be unveiled. Here we analyse both genome size (GS) and karyotype in two subtribes recently included in the broadened Maxillariinea to detect how much chromosome and GS variation there is in these groups and to evaluate which genome rearrangements are involved in the species evolution. To do so, the GS (14 species), the karyotype - based on chromosome number, heterochromatic banding and 5S and 45S rDNA localisation (18 species) - was characterised and analysed along with published data using phylogenetic approaches. The GS presented a high phylogenetic correlation and it was related to morphological groups in Bifrenaria (larger plants - higher GS). The two largest GS found among genera were caused by different mechanisms: polyploidy in Bifrenaria tyrianthina and accumulation of repetitive DNA in Scuticaria hadwenii. The chromosome number variability was caused mainly through descending dysploidy, and x=20 was estimated as the base chromosome number. Combining GS and karyotype data with molecular phylogeny, our data provide a more complete scenario of the karyotype evolution in Maxillariinae orchids, allowing us to suggest, besides dysploidy, that inversions and transposable elements as two mechanisms involved in the karyotype evolution. Such karyotype modifications could be associated with niche changes that occurred during species evolution.

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“…(); the GS for Peristeria elata Hook., 2C=9.34, was taken from Jones et al . (); and for Oncidium cheirophorum Rchb.f., 2n=56, from Sinoto () and Tanaka & Kamemoto ().…”

Section: Methodsmentioning

confidence: 99%

Karyotype diversity and genome size variation in Neotropical Maxillariinae orchids

et al. 2017

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“…Interspecific DNA content variations are wide spread and has been well documented in numerous genera of angiosperms like Oxalis (De Azkue and Martinez 1988), Guizotia (Hiremath et al 1992), Eleusine (Hiremath and Salimath 1991), Pisum (Baranyi and Greilhuber 1996), Arachis (Singh et al 1996), Plantago (Pramanik and Raychaudhuri 1997), Acacia and Prosopis (Bukhari 1997), Mammillaria (Mohanty et al 1997), Dendrobium (Jones et al 1998), Cistus (Ellul et al 2002). These aspects have been reviewed by Bennett et.…”

Section: Introductionmentioning

confidence: 97%

Genome size variation and evolution in some species ofDalbergiaLinn.f. (Fabaceae)

Hiremath

Nagasampige

2004

Caryologia

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The present study deals with the extent of genome size variation and evolution in some species of Dalbergia. The interspecific 4C DNA content variation has been analyzed in 30 accessions belonging to ten species of Dalbergia. The 4C DNA content in ten Dalbergia species ranges from 5.85 pg in D. lanceolaria to 7.88 pg in D. horrida, about 1.3 fold variation is apparent at a constant chromosome number 2n=2x=20. ANOVA test reveals significant variation between species. Like other woody angiospermic taxa, tree species of Dalbergia exhibit small genome size ranging from 5.85 pg in D. lanceolaria to 7.22 pg in D. sissoides. In contrast, the shrubs and climbers of this genus also reveal a narrow range of genome size variation from 7.36 pg in D. rubiginosa to 7.88 pg in D. horrida The climber species of this genus exhibits higher DNA amount than the tree species. The present investigation indicate that lianas or climber species of Dalbergia have evolved from tree species through evolutionary increase in genome size. The extent of DNA amount differences between the Dalbergia species has been discussed in the light of their interrelationships and diversity.

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“…Nevertheless, they reveal that Orchidaceae are presently the angiosperm family with the largest range of genome sizes, spanning 168‐fold (1C = 0.33–55.4 pg) (Bennett and Leitch, 2005; Plant DNA C‐values database, http://www.data.kew.org/cvalues/). The largest genomes are found in members of the subfamilies Cypripedioideae and Vanilloideae (Jones et al, 1998; Leitch et al, 2009). The 2C DNA content has been reported for some Vanilla species: V. planifolia (2C = 6.3 pg, Kausch and Horner, 1984; 5.03 pg, Bory et al, 2008; and an atypical value of 15.5 pg, Zonneveld et al, 2005), V. pompona (8.2–10.7 pg, Bory, 2007), and V. phaeantha Rchb.f.…”

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confidence: 99%

Diversity and dynamics of plant genome size: An example of polysomaty from a cytogenetic study of Tahitian vanilla (Vanilla ×tahitensis, Orchidaceae)

Lepers-Andrzejewski¹,

Siljak‐Yakovlev²,

Brown³

et al. 2011

American J of Botany

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Nuclear DNA Content of 26 Orchid (Orchidaceae) Genera with Emphasis onDendrobium

Cited by 43 publications

References 12 publications

Karyotype diversity and genome size variation in Neotropical Maxillariinae orchids

Karyotype diversity and genome size variation in Neotropical Maxillariinae orchids

Genome size variation and evolution in some species ofDalbergiaLinn.f. (Fabaceae)

Diversity and dynamics of plant genome size: An example of polysomaty from a cytogenetic study of Tahitian vanilla (Vanilla ×tahitensis, Orchidaceae)

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