Redefined and novel cow fertility measures in development of precision reproductive management tools and integrated genetic improvement

FINFERT

Start day

01.04.2016

End day

31.03.2020

Goals

Improved genetic evaluation of fertility traits i dairy cattle and possible new phenotypes to be used in herd reproduction managemenent. Includes 1) Phenotypes and avoidance of negative energy balance, 2) Genomic evaluation of female fertility and male fertility traits, 3) Molecular genetics level measures of intra genomic inbreeding, and it's consequences.

Outputs

1) New phenotypes were extracted from the Herd Navigator data. Physiologial cycling measures were analyzed and publication is done. 2) Genomic data was added to female fertility evaluation, and a male fertility genomic evaluations were tested. Because of low h2 the models converged poorly, thus a QP transformation was developed which solved the computational problem.