Nuclear DNA contents of all species of Helleborus (Ranunculaceae) discriminate between species and sectional divisions

Zonneveld, B. J. M.

doi:10.1007/s006060170022

Cited by 67 publications

(58 citation statements)

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“…Genome size and C-value are important characteristics of all living organisms. These measures may be very helpful in clarifying the origin and evolution of present-day species (Thalmann et al, 2000;Zonneveld, 2001;Šiško et al, 2003;Bureš et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Genome Size of the Diploid Hybrid Species Hippophae goniocarpa and Its Parental Species, H. rhamnoides ssp. sinensis and H. neurocarpa ssp. neurocarpa (Elaeagnaceae)

Zhou¹,

Ma²,

Wang³

et al. 2010

Acta Biologica Cracoviensia Series Botanica

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Hybridization may induce rapid genomic changes, including gain or loss of DNA. We examined nuclear DNA content of a diploid hybrid species, Hippophae goniocarpa and its two parental species. The nuclear 2C DNA value was 2.95±0.08 pg for H. goniocarpa; for the parental species it ranged from 2.54±0.09 pg to 2.66±0.12 pg for H. rhamnoides ssp. sinensis and from 3.15±0.19 pg to 3.49±0.06 pg for H. neurocarpa ssp. neurocarpa. The nuclear DNA content of H. goniocarpa was intermediate between those of the two parental species, confirming that this species is of diploid hybrid origin and further suggesting that it is in an early stage of the process of speciation.K Ke ey y w wo or rd ds s: : Nuclear DNA content, flow cytometry, H. goniocarpa, hybrid species, interspecific and intraspecific variation.

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Section: Introductionmentioning

confidence: 99%

Genome Size of the Diploid Hybrid Species Hippophae goniocarpa and Its Parental Species, H. rhamnoides ssp. sinensis and H. neurocarpa ssp. neurocarpa (Elaeagnaceae)

Zhou¹,

Ma²,

Wang³

et al. 2010

Acta Biologica Cracoviensia Series Botanica

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“…Where many species in a genus have the same chromosome numbers, differences in nuclear DNA content are often present and have proven to be very effective in delimiting infrageneric divisions in a number of taxa (Ohri 1998). Genome size has been demonstrated to often vary a factor 1.5-3 between taxa with identical chromosome numbers (Ohri 1998;Yokoya et al 2000;Zonneveld 2001;Zonneveld and van Iren 2001;Ellul et al 2002;Zonneveld et al 2003a, b;Hirsch et al 2004: Albach andGreilhuber 2004;Zonneveld and Duncan 2006). Moreover, Greilhuber (1998Greilhuber ( , 2005 has clearly shown that intraspecific variation of genome size is much less than assumed.…”

Section: Introductionmentioning

confidence: 99%

The systematic value of nuclear DNA content for all species of Narcissus L. (Amaryllidaceae)

Zonneveld

2008

Plant Syst Evol

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The taxonomy of all species of Narcissus (Amaryllidaceae), an important horticultural crop, has not been investigated recently. As a new approach, genome size was determined by flow cytometry with propidium iodide from 375 accessions. The somatic nuclear DNA contents (2C) were shown to range from 14 to 38 pg for the diploids. Narcissus assoanus and N. gaditanus are, based on their nuclear DNA content, removed from section Apodanthi and placed in a new section Juncifolii. The different ploidy levels and species involved were entangled for N. ''fernandesii'' s.l. and a new allotetraploid form is named here. Section Pseudonarcissus was much more heterogeneous in nuclear DNA content than expected. Sixty-five accessions of N. pseudonarcissus possessed, with 23.7 pg, similar amounts of DNA. However, several species from this section were clearly distinctive in nuclear DNA content. It runs from the diploid N. primigenius with 21.7 pg to the also diploid N. nevadensis with 38.2 pg. Also N. abscissus and N. moleroi are with about 26 pg clearly different from N. pseudonarcissus. For the first time, in 11 accessions, hexaploidy was found in N. pseudonarcissus ssp. bicolor. A new section Nevadensis with 30-39 pg of nuclear DNA was split off from the section Pseudonarcissus with now 21-27 pg. A nonoploid N. dubius with 96.3 pg has by far the highest amount of nuclear DNA and can be calculated to have the highest ploidy ever reported in Narcisssus. The total number of Narcissus species was determined as 36, nine more than in Flora Europaea and they were divided up in two subgenera and 11 sections. Flow cytometry is shown to produce easily obtainable and original systematic data that lead to new insights. Genome size or C-value turns out to be one of the most salient features to define the status of the species in the genus Narcissus.

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“…Flow cytometry has been successfully used to measure genome size for the genera Hosta Tratt., Helleborus L., Galanthus L., Narcissus L., Tulipa L., Eucomus L'Hér., and Hepatica Mill, etc. by Zonneveld (2001Zonneveld ( , 2008Zonneveld ( , 2009Zonneveld ( , 2010aZonneveld ( , b, 2011, Zonneveld and Van Iren (2001), Zonneveld and Duncan (2010), and Zonneveld et al (2003). In the work discussed in this paper all 19 species of Araucaria were measured and the correlation of their genome size with geographical spreading is demonstrated.…”

Section: Introductionmentioning

confidence: 94%

Genome sizes of all 19 Araucaria species are correlated with their geographical distribution

Zonneveld

2012

Plant Syst Evol

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Nuclear DNA contents of all species of Helleborus (Ranunculaceae) discriminate between species and sectional divisions

Cited by 67 publications

References 0 publications

Genome Size of the Diploid Hybrid Species Hippophae goniocarpa and Its Parental Species, H. rhamnoides ssp. sinensis and H. neurocarpa ssp. neurocarpa (Elaeagnaceae)

Genome Size of the Diploid Hybrid Species Hippophae goniocarpa and Its Parental Species, H. rhamnoides ssp. sinensis and H. neurocarpa ssp. neurocarpa (Elaeagnaceae)

The systematic value of nuclear DNA content for all species of Narcissus L. (Amaryllidaceae)

Genome sizes of all 19 Araucaria species are correlated with their geographical distribution

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