The genetic relationship between commencement of luteal activity and calving interval, body condition score, production, and linear type traits in Holstein-Friesian dairy cattle.

@article{Royal2002TheGR,
  title={The genetic relationship between commencement of luteal activity and calving interval, body condition score, production, and linear type traits in Holstein-Friesian dairy cattle.},
  author={Melissa Dawn Royal and Jennie E. Pryce and John A. Woolliams and Anthony P F Flint},
  journal={Journal of dairy science},
  year={2002},
  volume={85 11},
  pages={3071-80}
}
The decline of fertility in the UK dairy herd and the unfavorable genetic correlation (r(a)) between fertility and milk yield has necessitated the broadening of breeding goals to include fertility. The coefficient of genetic variation present in fertility is of similar magnitude to that present in production traits; however, traditional measurements of fertility (such as calving interval, days open, nonreturn rate) have low heritability (h2 < 0.05), and recording is often poor, hindering… CONTINUE READING
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Declining fertility in dairy cattle: Changes in traditional and endocrine parameters of fertility

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  • Anim. Sci. 70:487–501.
  • 2000
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Estimation of genetic variation in the LH response to a GnRH challenge in pre-pubertal HolsteinFriesian heifers

  • M. D. Royal, A.P.F.A.O. Darwash, Flint, R. Webb, G. E. Lamming, J. A. Woolliams.
  • Proc. Brit. Soc. Anim. Sci.
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Estimation of genetic variation in the interval from parturition to commencement of luteal activity in Holstein-Freisian dairy cows

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  • J. Reprod. Fert. Abstract Ser. 25. Abstr. 74.
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Economic response to total merit selection in Finnish Ayrshire breeding

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  • GIFT, Nov 7–9th, The Netherlands.
  • 1999
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Genetic variation in endocrine parameters of fertility

  • M. D. Royal
  • PhD thesis. University of Nottingham.
  • 1999
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The phenotypic association between the interval to postpartum ovulation and traditional measures of fertility in dairy cattle

  • A. O. Darwash, J. A. Woolliams, G. E. Lamming.
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