PMID: 3744902Jan 1, 1986Paper

Cytophotometric evidence of variation in genome size of desmognathine salamanders

Histochemistry
M K HallyR C Bruce

Abstract

The amount of DNA per haploid genome, the C-value, is often directly correlated with nuclear and cell volume, but inversely correlated with cell replication rate. Also, rates of cellular growth sometimes appear to be correlated with organismal developmental rates and life history patterns. Among vertebrates, salamanders exhibit the greatest variation in genome size. In the present study we have examined interspecific and intraspecific variation in blood cell DNA levels in the genus Desmognathus, which shows greater variation in life history traits than any other salamander genus. Specimens of Desmognathus quadramaculatus, D. monticola, D. ochrophaeus and D. wrighti were collected from nature at two localities in the southern Appalachian Mountains. Estimates of genome size in pg of DNA were obtained from blood smears by DNA-Feulgen cytophotometry, using erythrocyte nuclei of Xenopus laevis as an internal reference standard of 6.35 pg DNA per cell. C-values of Desmognathus are the smallest in the order Caudata. Although significant variation in DNA levels was found among the four species, the differences were small, and do not support previously proposed relationships between C-value and life-history variation.

References

Feb 3, 1977·Chromosoma·C H Thiébaud, M Fischberg
Jul 15, 1975·Experientia·E Olmo, A Morescalchi
Jan 1, 1970·Histochemie. Histochemistry. Histochimie·K Bachmann
Jan 1, 1968·Histochemie. Histochemistry. Histochimie·K Bachmann
Jul 1, 1965·Journal of Molecular Biology·I B Dawid
Jun 1, 1967·The Journal of Cell Biology·J A Grasso, J W Woodard
Oct 1, 1981·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·D C AllisonT S Johnson
Apr 17, 1980·Nature·W F Doolittle, C Sapienza
Dec 1, 1981·The Journal of Cell Biology·J G Gall
Jan 1, 1982·Annual Review of Biophysics and Bioengineering·T Cavalier-Smith
Apr 17, 1980·Nature·L E Orgel, F H Crick
Jan 1, 1971·Annual Review of Genetics·C A Thomas
Dec 1, 1968·Evolution; International Journal of Organic Evolution·Stephen G Tilley

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Citations

Apr 24, 2008·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·Stanley K SessionsDavid B Wake
May 24, 1994·Proceedings of the National Academy of Sciences of the United States of America·G RothD B Wake
Jan 26, 2017·Genome Génome / Conseil National De Recherches Canada·Catherine E NewmanChristopher C Austin
Sep 25, 2018·Evolution; International Journal of Organic Evolution·Kara S Jones, David W Weisrock
Jan 1, 1997·Journal of Morphology·Andrea Schmidt, Marvalee H Wake
Nov 1, 1987·Evolution; International Journal of Organic Evolution·Stanley K Sessions, Allan Larson

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