cow-dam-calf-4.html
VikingNews UK 03 2015
5 / 24
new rules for publication of
daughter
proven indexes still
daughter
proven sires w ith the latest index run in august 2015 nav (nordic cattle genetic evaluation) has changed the rules for transition from genomic breeding
values
to breeding
values
based on
daughter
s
. by increasing the needed reliabilities for publish- ing a trait as
daughter
proven breeding value, we will see smaller changes to the proofs, when changing from genomic
values
to
values
based on
daughter
s. when a gvp sire from vikinggenetics reaches breeding
values
based on
daughter
s for yield, type and mastitis resistance, vg will publish them as
daughter
proven sires. vikinggenetics still has a strong line-up of
daughter
prov- en bulls - just as before - for you that prefers that. i n the recent years the genomically tested sires have had much attention. the domestic mating plans and the lists with sires of sons consist almost only of ?genomic sires?. ?does vikinggenetics still progeny test bulls? is a ques- tion we often get? the answer is yes. all sires that enter ai do get a progeny test. today the average
daughter
size is even larger than before the genomic era with several hundred
daughter
s. like in the past, traditional progeny based breeding
values
are calculated by nav. the methods for calculating tradi- tional breeding
values
are still under improvement and breeding
values
for new traits are developed. the newly progeny tested sires are an important source of information for re-newing the reference populations - even though fe- males are now included. vh bynke
daughter
s by niels nørgaard, denmark. table 1. current and previous reliabilities for
daughter
proven ebv publications trait current previous yield traits 90% 60% type traits 50
daughter
s 15
daughter
s fertility 75% 35% mastitis 75% 40% calving traits direct 75% 50% longevity 75% 50% hoof health 75% 40% 5 september 2015 | vikingnews
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