T R Gregory

Summary

Affiliation: University of Guelph
Country: Canada

Publications

  1. doi request reprint Genome size diversity in the family Drosophilidae
    T R Gregory
    Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada
    Heredity (Edinb) 101:228-38. 2008
  2. doi request reprint Population size and genome size in fishes: a closer look
    T Ryan Gregory
    Department of Integrative Biology University of Guelph, Guelph, ON N1G 2W1, Canada
    Genome 51:309-13. 2008
  3. pmc The smallest avian genomes are found in hummingbirds
    T Ryan Gregory
    Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada
    Proc Biol Sci 276:3753-7. 2009
  4. ncbi request reprint Genome size and developmental complexity
    T Ryan Gregory
    Department of Zoology, University of Guelph, Ontario, Canada
    Genetica 115:131-46. 2002
  5. pmc Eukaryotic genome size databases
    T Ryan Gregory
    Department of Integrative Biology, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
    Nucleic Acids Res 35:D332-8. 2007
  6. ncbi request reprint A bird's-eye view of the C-value enigma: genome size, cell size, and metabolic rate in the class aves
    T Ryan Gregory
    Department of Zoology, University of Guelph, Ontario, Canada
    Evolution 56:121-30. 2002
  7. ncbi request reprint The bigger the C-value, the larger the cell: genome size and red blood cell size in vertebrates
    T R Gregory
    Department of Zoology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    Blood Cells Mol Dis 27:830-43. 2001
  8. ncbi request reprint Nucleotypic effects without nuclei: genome size and erythrocyte size in mammals
    T R Gregory
    Department of Zoology, University of Guelph, ON, Canada
    Genome 43:895-901. 2000
  9. ncbi request reprint Evolutionary implications of the relationship between genome size and body size in flatworms and copepods
    T R Gregory
    Department of Zoology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
    Heredity (Edinb) 84:201-8. 2000
  10. ncbi request reprint The effects of chronic plasma cortisol elevation on the feeding behaviour, growth, competitive ability, and swimming performance of juvenile rainbow trout
    T R Gregory
    Department of Biology, McMaster University, Hamilton, Ontario L8S 4K1, Canada
    Physiol Biochem Zool 72:286-95. 1999

Detail Information

Publications33

  1. doi request reprint Genome size diversity in the family Drosophilidae
    T R Gregory
    Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada
    Heredity (Edinb) 101:228-38. 2008
    ..These findings may provide some explanation for the streamlined genomes found in these insects, and complement recent work demonstrating possible selective constraints on further deletion of noncoding DNA...
  2. doi request reprint Population size and genome size in fishes: a closer look
    T Ryan Gregory
    Department of Integrative Biology University of Guelph, Guelph, ON N1G 2W1, Canada
    Genome 51:309-13. 2008
    ....
  3. pmc The smallest avian genomes are found in hummingbirds
    T Ryan Gregory
    Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada
    Proc Biol Sci 276:3753-7. 2009
    ..This suggests that the secondary expansion of the genome may have been mediated by biogeographical and demographic effects...
  4. ncbi request reprint Genome size and developmental complexity
    T Ryan Gregory
    Department of Zoology, University of Guelph, Ontario, Canada
    Genetica 115:131-46. 2002
    ..In each case, a hierarchical approach is necessary which recognizes the complex interaction of evolutionary processes operating at several levels of biological organization...
  5. pmc Eukaryotic genome size databases
    T Ryan Gregory
    Department of Integrative Biology, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
    Nucleic Acids Res 35:D332-8. 2007
    ....
  6. ncbi request reprint A bird's-eye view of the C-value enigma: genome size, cell size, and metabolic rate in the class aves
    T Ryan Gregory
    Department of Zoology, University of Guelph, Ontario, Canada
    Evolution 56:121-30. 2002
    ..Following from a discussion of the mechanistic bases of the correlations reported and the processes by which birds achieved and/or maintain small genomes, a pluralistic approach to the C-value enigma is recommended...
  7. ncbi request reprint The bigger the C-value, the larger the cell: genome size and red blood cell size in vertebrates
    T R Gregory
    Department of Zoology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    Blood Cells Mol Dis 27:830-43. 2001
    ..The present article describes the correlation between genome size and RBC size in vertebrates and discusses some of the cytological, physiological, and evolutionary implications of this relationship...
  8. ncbi request reprint Nucleotypic effects without nuclei: genome size and erythrocyte size in mammals
    T R Gregory
    Department of Zoology, University of Guelph, ON, Canada
    Genome 43:895-901. 2000
    ..In evolutionary terms, they provide insights into the constraints on genome expansion among mammals and are therefore of interest in attempts to solve the long-standing C-value enigma (also known as the C-value paradox)...
  9. ncbi request reprint Evolutionary implications of the relationship between genome size and body size in flatworms and copepods
    T R Gregory
    Department of Zoology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
    Heredity (Edinb) 84:201-8. 2000
    ..Genome sizes appear to vary in a discontinuous fashion among congeneric species in both groups, indicating that such changes have occurred rapidly, and with potentially profound effects on important morphological characters...
  10. ncbi request reprint The effects of chronic plasma cortisol elevation on the feeding behaviour, growth, competitive ability, and swimming performance of juvenile rainbow trout
    T R Gregory
    Department of Biology, McMaster University, Hamilton, Ontario L8S 4K1, Canada
    Physiol Biochem Zool 72:286-95. 1999
    ....
  11. ncbi request reprint The modulation of DNA content: proximate causes and ultimate consequences
    T R Gregory
    Department of Zoology, University of Guelph, Guelph, Ontario N1G 2W1
    Genome Res 9:317-24. 1999
    ..These abrupt shifts have broad effects on phenotypic attributes at both cellular and organismal levels and may play an important role in explaining episodes of rapid-or even saltational-character state evolution...
  12. doi request reprint An expansion of the genome size dataset for the insect order Hymenoptera, with a first test of parasitism and eusociality as possible constraints
    A M Ardila-Garcia
    Department of Integrative Biology, University of Guelph, Guelph, ON, Canada
    Insect Mol Biol 19:337-46. 2010
    ..The data provided here can be used to guide future research aimed at understanding the evolution of large-scale genomic properties in this order...
  13. ncbi request reprint Coincidence, coevolution, or causation? DNA content, cell size, and the C-value enigma
    T R Gregory
    Department of Zoology, University of Guelph, Ontario, Canada
    Biol Rev Camb Philos Soc 76:65-101. 2001
    ..Finally, some evolutionary implications of genome size diversity are considered, and a broadening of the traditional 'biological hierarchy' is recommended...
  14. ncbi request reprint The correlation between rDNA copy number and genome size in eukaryotes
    Cheryl D Prokopowich
    Department of Zoology, University of Guelph, Guelph, ON N1G 2W1, Canada
    Genome 46:48-50. 2003
    ..No simple explanations exist for this relationship, but it is nevertheless of clear relevance from both practical and theoretical perspectives...
  15. ncbi request reprint New insights into the distribution of polyploid Daphnia: the Holarctic revisited and Argentina explored
    Sarah J Adamowicz
    Department of Zoology, University of Guelph, Guelph, ON, Canada, N1G 2W1
    Mol Ecol 11:1209-17. 2002
    ..Because of these differences, the present study provides important insights into the diverse factors that determine the distributions and evolutionary fates of polyploid organisms...
  16. ncbi request reprint The promise of DNA barcoding for taxonomy
    Paul D N Hebert
    Department of Integrative Biology, Biodiversity Institute of Ontario, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    Syst Biol 54:852-9. 2005
  17. doi request reprint Identifying the last supper: utility of the DNA barcode library for bloodmeal identification in ticks
    T D Gariepy
    Agriculture and Agri Food Canada, Southern Crop Protection and Food Research Centre, London, ON, Canada
    Mol Ecol Resour 12:646-52. 2012
    ..Future directions aimed at the refinement of these techniques to gain additional information and to improve the amplification success of digested vertebrate DNA in tick bloodmeals are discussed...
  18. ncbi request reprint Genome sizes of spiders
    T R Gregory
    Department of Zoology, University of Guelph, Guelph, ON N1G 2W1 Canada
    J Hered 94:285-90. 2003
    ..No clear-cut patterns of variation were detectable even with this relatively large data set, but some interesting avenues for future research have been illuminated by this preliminary survey...
  19. pmc Genome size and wing parameters in passerine birds
    Chandler B Andrews
    Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
    Proc Biol Sci 276:55-61. 2009
    ....
  20. doi request reprint Genome size is inversely correlated with relative brain size in parrots and cockatoos
    Chandler B Andrews
    Department of Integrative Biology, University of Guelph, Guelph, ON N1G2W1, Canada
    Genome 52:261-7. 2009
    ..Several possible and mutually compatible explanations for this relationship are described...
  21. pmc The genome sizes of megabats (Chiroptera: Pteropodidae) are remarkably constrained
    Jillian D L Smith
    Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
    Biol Lett 5:347-51. 2009
    ..Intriguingly, megabats appear to be even more constrained in terms of genome size than the members of other bat families...
  22. ncbi request reprint Genome size and developmental parameters in the homeothermic vertebrates
    T Ryan Gregory
    Department of Zoology, University of Guelph, ON, Canada
    Genome 45:833-8. 2002
    ..These findings make it clear that genome size evolution cannot be understood without reference to the particular biology of the organisms under study...
  23. ncbi request reprint Synergy between sequence and size in large-scale genomics
    T Ryan Gregory
    Department of Integrative Biology, University of Guelph, Ontario N1G 2W1, Canada
    Nat Rev Genet 6:699-708. 2005
    ..In combination, these formerly disconnected disciplines are poised to deliver a greatly improved understanding of genome structure and evolution...
  24. ncbi request reprint From pixels to picograms: a beginners' guide to genome quantification by Feulgen image analysis densitometry
    David C Hardie
    Department of Zoology, University of Guelph, Guelph, Ontario, Canada
    J Histochem Cytochem 50:735-49. 2002
    ..We hope that the accuracy, rapidity, and cost-effectiveness of Feulgen image analysis demonstrated here will stimulate further surveys of genome sizes in a variety of taxa...
  25. pmc DNA-based species delineation in tropical beetles using mitochondrial and nuclear markers
    Michael T Monaghan
    Department of Entomology, Natural History Museum, Cromwell Road, London SW7 5BD, UK
    Philos Trans R Soc Lond B Biol Sci 360:1925-33. 2005
    ..Applied on a large scale, this DNA-based approach could greatly improve the rate of species discovery in the large assemblages of insects that remain undescribed...
  26. pmc Genome size, cell size, and the evolution of enucleated erythrocytes in attenuate salamanders
    Rachel Lockridge Mueller
    Museum of Vertebrate Zoology, 3101 Valley Life Sciences Bldg, University of California, Berkeley, CA 94720 3160, USA
    Zoology (Jena) 111:218-30. 2008
    ....
  27. ncbi request reprint Preparation of samples for comparative studies of arthropod chromosomes: visualization, in situ hybridization, and genome size estimation
    Rob DeSalle
    Department of Invertebrate Zoology, American Museum of Natural History, New York, New York 10024, USA
    Methods Enzymol 395:460-88. 2005
    ..As well, advances in Genome size measurement and theory are described herein...
  28. ncbi request reprint The C-value enigma in plants and animals: a review of parallels and an appeal for partnership
    T Ryan Gregory
    Department of Entomology, The Natural History Museum, Cromwell Road, London SW7 5BD, UK
    Ann Bot 95:133-46. 2005
    ....
  29. ncbi request reprint Is small indel bias a determinant of genome size?
    T Ryan Gregory
    Division of Invertebrate Zoology, American Museum of Natural History, Central Park West at 79th St, New York, NY 10024, USA
    Trends Genet 19:485-8. 2003
  30. ncbi request reprint The tardigrade Hypsibius dujardini, a new model for studying the evolution of development
    Willow N Gabriel
    Biology Department, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
    Dev Biol 312:545-59. 2007
    ..We present a cell lineage of the early embryo and an embryonic staging series. We expect that these data can serve as a platform for using H. dujardini as a model for studying the evolution of developmental mechanisms...
  31. ncbi request reprint Genome size estimates for two important freshwater molluscs, the zebra mussel (Dreissena polymorpha) and the schistosomiasis vector snail (Biomphalaria glabrata)
    T Ryan Gregory
    Division of Invertebrate Zoology, American Museum of Natual History, New York, NY 10024, USA
    Genome 46:841-4. 2003
    ..B. glabrata in particular, which has one of the smallest known gastropod genomes, is recommended as a highly suitable target for future genome sequencing...
  32. ncbi request reprint Insertion-deletion biases and the evolution of genome size
    T Ryan Gregory
    Division of Invertebrate Zoology, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024, USA
    Gene 324:15-34. 2004
    ..Overall, evolutionary reductions in genome size are considered important, but the specific mechanism relating to small deletion bias is far too weak to be accepted as a primary determinant of genome size variation in general...
  33. ncbi request reprint DNA barcoding does not compete with taxonomy
    T Ryan Gregory
    Nature 434:1067. 2005