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VikingNews UK 04 2016
20 / 28
20 vikingnews | november 2016 extensive technology behind finding the correct holstein
bull
calves
genomically
tested
dams give more hits statistics from our
bull
calf selection show that we buy more
bull
calves
af- ter genomically
tested
dams than from those not genomically
tested
. out of the
tested
bull
calves
, 60% of the dams had genomic nordic total merit (ntm), but when we selected the
bull
calves
, 84% of the dams were genomi- cally
tested
. this shows that the suc- cess rates are higher on genomically
tested
females because of higher relia- bility of the genomic breeding values. we can also see that the success rate from embryos is very high. 18% of all
tested
bull
calves
a year back are from embryos, and 41% of the bought
bull
s are embryo
calves
. the parental average (pa) ntm on
bull
calves
tested
last year was 20, and their average ntm after genomic test (gebv) was 18. this shows that the av- erage ntm does not differ between pedigree index and genomic index; but we can see big re-ranking, sometimes as big as 20 ntm units, but most of the
calves
have a difference in +/-6 ntm units. see figure 1. the pa on the bought
bull
calves
was 22 and gebv in average +31. quality in focus the bought
bull
s have 60 different sires and 55 different maternal grand sires. this means that we buy only one
bull
calf after most of the sires of sons today. from some sires, we find two and up to five good
bull
calves
. last year, 71% of the
bull
s were bought in denmark, 14% in finland, 13% in sweden and 3% abroad. see tables 1 and 2. by ann tidström, sire analyst, vikinggenetics during one year, we genomically test 3000 holstein
bull
calves
in the three vikinggenetics countries and 5000 in our cooperation with nog (german ai company). the goal is to have 100 holstein
bull
s sampled in total, placed in the nordic countries and abroad. mgs name number of offspring vh grafit 7 vh miracle 7 denim 4 vh bostrup 4 g force 4 picanto 4 vh pop 4 table 1: the most common sires among our
bull
s table 2: the most common mgs among our
bull
s sire name number of offspring reflector 5 vh cosmo 3 vh lemek 3 vh liftoff 3 vh sparky 3 figure 1. difference between gebv (genomically enhanced breeding values) and pa (parental average). this figure shows the importance of using genomic selection to find the correct
bull
s. for example, this figure shows that we have bought one
bull
that increased 21 ntm units when
tested
genomically. the distribution on bought
bull
calves
difference between gebv and pa
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