Milk progesterone measures to improve genomic selection for fertility in dairy cows

Promotie

Milk progesterone measures to improve genomic selection for fertility in dairy cows

Promovendus AMM (Amabel) Tenghe
Promotor prof.dr.ir. RF (Roel) Veerkamp
Copromotor dr.ir. AC (Aniek) Bouwman PhD
Copromotor prof.dr.ir. DJ de Koning
prof.dr.ir. B Berglund
Organisatie Wageningen University, Wageningen Livestock Research
Datum

vr 28 april 2017 16:00 tot 17:30

Locatie Auditorium, building number 362
Generaal Foulkesweg 1
362
6703 BG Wageningen
0317-483592

Summary

Improved reproductive performance has a substantial benefit for dairy cattle farming by decreasing insemination costs and veterinary treatment, shortening calving intervals, and extending the longevity of dairy cows. Unfortunately, the low heritability of classical fertility traits derived from calving and insemination data makes genetic improvement by traditional animal breeding slow. Therefore, there is an interest in finding novel measures of fertility that have a higher heritability, or using genomic information to aid genetic selection for fertility. In my thesis, I showed that “novel” endocrine fertility traits derived from in-line milk progesterone concentrations are more heritable than classical fertility traits. I also showed that in-line milk progesterone combined with genomics is the optimum way to improve selection to improve the underlying biology for fertility in dairy cows. Nonetheless, for an economic breeding goal, classical traits are effective since they are recorded on a much larger scale.