George H Davis

Summary

Affiliation: Upper Hutt
Country: New Zealand

Publications

  1. ncbi DNA tests in prolific sheep from eight countries provide new evidence on origin of the Booroola (FecB) mutation
    George H Davis
    Invermay Agricultural Centre, Mosgiel, New Zealand
    Biol Reprod 66:1869-74. 2002
  2. pmc Major genes affecting ovulation rate in sheep
    George Henry Davis
    AgResearch, Invermay Agricultural Centre, Private Bag, Mosgiel, New Zealand
    Genet Sel Evol 37:S11-23. 2005
  3. ncbi A putative autosomal gene increasing ovulation rate in Romney sheep
    G H Davis
    AgResearch, Invermay Agricultural Centre, Animal Production Unit, Puddle Alley, Private Bag, Mosgiel 50034, New Zealand
    Anim Reprod Sci 92:65-73. 2006
  4. ncbi Fecundity genes in sheep
    G H Davis
    AgResearch, Invermay Agricultural Centre, Private Bag 50034, Mosgiel, New Zealand
    Anim Reprod Sci 82:247-53. 2004
  5. ncbi Investigation of the Booroola (FecB) and Inverdale (FecX(I)) mutations in 21 prolific breeds and strains of sheep sampled in 13 countries
    G H Davis
    AgResearch Invermay Agricultural Centre, Animal Production Unit, Puddle Alley, Private Bag, Mosgiel 50034, New Zealand
    Anim Reprod Sci 92:87-96. 2006
  6. doi Identification of a line of sheep carrying a putative autosomal gene increasing ovulation rate in sheep that does not appear to interact with mutations in the transforming growth factor beta superfamily
    Jennifer L Juengel
    Centre for Reproduction and Genomics, AgResearch Limited, Invermay Agricultural Centre, Mosgiel, New Zealand
    Biol Reprod 85:113-20. 2011
  7. ncbi Patterns of expression of messenger RNAs encoding GDF9, BMP15, TGFBR1, BMPR1B, and BMPR2 during follicular development and characterization of ovarian follicular populations in ewes carrying the Woodlands FecX2W mutation
    Elisabeth S Feary
    Wallaceville Animal Research Centre, AgResearch, Upper Hutt 5140, New Zealand
    Biol Reprod 77:990-8. 2007
  8. doi An earlier rise in systemic progesterone and increased progesterone in the uterine vein during early pregnancy are associated with enhanced embryonic survival in the ewe
    Anne R O'Connell
    Reproductive and Developmental Biology, AgResearch Invermay, Puddle Alley, Mosgiel, New Zealand
    Theriogenology 80:269-74. 2013
  9. doi Using sheep lines with mutations in single genes to better understand ovarian function
    Jennifer L Juengel
    AgResearch Centre for Reproduction and Genomics, AgResearch Limited, Invermay Agricultural Centre, Puddle Alley, Private Bag 50034, Mosgiel 9053, New Zealand
    Reproduction 146:R111-23. 2013
  10. ncbi Physiology of GDF9 and BMP15 signalling molecules
    J L Juengel
    AgResearch, Wallaceville Animal Research Centre, Ward Street, P O Box 40063, Upper Hutt, New Zealand
    Anim Reprod Sci 82:447-60. 2004

Detail Information

Publications16

  1. ncbi DNA tests in prolific sheep from eight countries provide new evidence on origin of the Booroola (FecB) mutation
    George H Davis
    Invermay Agricultural Centre, Mosgiel, New Zealand
    Biol Reprod 66:1869-74. 2002
    ..The DNA mutation test for FecB will enable breeding plans to be developed that allow the most effective use of this gene in Garole and Javanese Thin-tailed sheep and their crosses...
  2. pmc Major genes affecting ovulation rate in sheep
    George Henry Davis
    AgResearch, Invermay Agricultural Centre, Private Bag, Mosgiel, New Zealand
    Genet Sel Evol 37:S11-23. 2005
    ..5 ovulations per oestrus for the BMPR-1B mutation. A commercial DNA testing service enables some of these mutations to be used in genetic improvement programmes based on marker assisted selection...
  3. ncbi A putative autosomal gene increasing ovulation rate in Romney sheep
    G H Davis
    AgResearch, Invermay Agricultural Centre, Animal Production Unit, Puddle Alley, Private Bag, Mosgiel 50034, New Zealand
    Anim Reprod Sci 92:65-73. 2006
    ..8-1.0 eggs per ewe ovulating. To date, we have found no evidence of infertility among putative homozygous ewes, as described in some autosomal major genes for prolificacy...
  4. ncbi Fecundity genes in sheep
    G H Davis
    AgResearch, Invermay Agricultural Centre, Private Bag 50034, Mosgiel, New Zealand
    Anim Reprod Sci 82:247-53. 2004
    ..4 ovulations per oestrus for the FecX2 mutation to an extra 1.5 ovulations per oestrus for the BMPR-1B mutation. DNA tests enable some of these mutations to be used in genetic improvement programmes based on marker assisted selection...
  5. ncbi Investigation of the Booroola (FecB) and Inverdale (FecX(I)) mutations in 21 prolific breeds and strains of sheep sampled in 13 countries
    G H Davis
    AgResearch Invermay Agricultural Centre, Animal Production Unit, Puddle Alley, Private Bag, Mosgiel 50034, New Zealand
    Anim Reprod Sci 92:87-96. 2006
    ..33, 0.58 and 0.08, respectively. There was no evidence of FecX(I) in any of the breeds sampled...
  6. doi Identification of a line of sheep carrying a putative autosomal gene increasing ovulation rate in sheep that does not appear to interact with mutations in the transforming growth factor beta superfamily
    Jennifer L Juengel
    Centre for Reproduction and Genomics, AgResearch Limited, Invermay Agricultural Centre, Mosgiel, New Zealand
    Biol Reprod 85:113-20. 2011
    ..Future identification of the causative mutation may provide new insights into regulation of follicular development and ovulation rate...
  7. ncbi Patterns of expression of messenger RNAs encoding GDF9, BMP15, TGFBR1, BMPR1B, and BMPR2 during follicular development and characterization of ovarian follicular populations in ewes carrying the Woodlands FecX2W mutation
    Elisabeth S Feary
    Wallaceville Animal Research Centre, AgResearch, Upper Hutt 5140, New Zealand
    Biol Reprod 77:990-8. 2007
    ....
  8. doi An earlier rise in systemic progesterone and increased progesterone in the uterine vein during early pregnancy are associated with enhanced embryonic survival in the ewe
    Anne R O'Connell
    Reproductive and Developmental Biology, AgResearch Invermay, Puddle Alley, Mosgiel, New Zealand
    Theriogenology 80:269-74. 2013
    ..It is proposed that the difference in uterine vein progesterone concentration was likely due to the differences in ovarian venous blood supply rather than de novo synthesis by the uterus...
  9. doi Using sheep lines with mutations in single genes to better understand ovarian function
    Jennifer L Juengel
    AgResearch Centre for Reproduction and Genomics, AgResearch Limited, Invermay Agricultural Centre, Puddle Alley, Private Bag 50034, Mosgiel 9053, New Zealand
    Reproduction 146:R111-23. 2013
    ..This review is focused on the identification of the mutations affecting ovulation rate and how these discoveries have provided new insights into control of ovarian function. ..
  10. ncbi Physiology of GDF9 and BMP15 signalling molecules
    J L Juengel
    AgResearch, Wallaceville Animal Research Centre, Ward Street, P O Box 40063, Upper Hutt, New Zealand
    Anim Reprod Sci 82:447-60. 2004
    ....
  11. ncbi Oocyte-derived growth factors and ovulation rate in sheep
    K P McNatty
    AgResearch, Wallaceville Animal Research Centre, PO Box 40063, Upper Hutt, New Zealand
    Reprod Suppl 61:339-51. 2003
    ..Moreover, it appears that the mechanisms that the oocyte uses to control these processes differ between species with low and high ovulation rate phenotypes...
  12. ncbi Bmp15 mutations and ovarian function
    S M Galloway
    AgResearch Molecular Biology Unit, Department of Biochemistry, University of Otago, P O Box 56, Dunedin, New Zealand
    Mol Cell Endocrinol 191:15-8. 2002
    ....
  13. ncbi Genetic mutations influencing ovulation rate in sheep
    K P McNatty
    AgResearch Wallaceville Animal Research Centre, Upper Hutt, New Zealand
    Reprod Fertil Dev 13:549-55. 2001
    ....
  14. pmc Physiological effects of major genes affecting ovulation rate in sheep
    Kenneth P McNatty
    AgResearch, Wallaceville Animal Research Centre, PO Box 40063, Upper Hutt, New Zealand
    Genet Sel Evol 37:S25-38. 2005
    ..In summary, these findings have led to a new paradigm in reproductive biology, namely that the oocyte plays a key role in regulating the ovulation rate...
  15. ncbi Evidence that an imprinted gene on the X chromosome increases ovulation rate in sheep
    G H Davis
    Invermay Agricultural Centre, Mosgiel, New Zealand
    Biol Reprod 64:216-21. 2001
    ..The gene was not expressed in ewes that received it from either carrier dams (expressing or nonexpressing) or from carrier males that were the progeny of expressing carrier dams...
  16. ncbi Identifying infertile homozygous Inverdale (FecXI) ewe lambs on the basis of genotype differences in reproductive hormone concentrations
    B J McLeod
    AgResearch, Invermay Agricultural Centre, Mosgiel, New Zealand
    Anim Reprod Sci 47:291-302. 1997
    ..This demonstrates that infertile homozygous ewe lambs can accurately be distinguished from their fertile flockmates by using plasma concentrations of gonadotrophins alone, and that this can be achieved from as early as 2 months of age...