vikinggenetics-ntm-com-2.html
AU Sire Catalogue 2016
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from left: erik thompson sales manager ertho@
vikinggenetics
.com 0417 219 156 darren fletcher sales representative gippsland dafle@
vikinggenetics
.com 0427 973 106 daphne thompson office datho@
vikinggenetics
.com 0260 713 007 anna norgren manager annor@
vikinggenetics
.com 0488 058 707 jarred burland sales representative western vic and sa jabur@
vikinggenetics
.com 0419 727 649
ntm
? nordic total merit 34.1% 13.6% 2.1% 100 90 80 70 110 120 130 0.1% 34.1% 13.6% 2.1% 0.1% how are the indexes in
ntm
expressed ? ebvs of all animals are adjusted in such a way that animals in the base population have an average index of 100. for all
traits
a rolling base consisting of cows from denmark, sweden and finland that are 3-5 years of age at the date of publication is applied. the standard deviation is a statistic that tells you how widely spread from the average the scores of all bulls are for any particular trait. the bell curve shows what each standard deviation represents. one standard deviation (10 units) away from the mean in either direction (the purple area) accounts for about 68 % of the bulls. weight of main
traits
in
ntm
for vikingholstein (similar for vikingreds and jerseys) 74% non return rate (nrr) this is a scandinavian ranking, based on scandinavian data. in the viking population they rate a bull with a non return rate by day 56 after first service. it is simply expressed as the percentage (%) of females not back in heat at day 56. if a sire is at 50% he is under observation, if a bull is 45%, semen use will stop. good bulls guide symbol when you see this icon you can be assured that the bull meets the requirements of the good bulls guide. 3% 6% 7% 1% 31% 2% 13% 6% 7% 14% 5% 5% 2% what is
ntm
?
ntm
(nordic total merit) is the most complete total merit index in the world.
ntm
consists of more than 40 sub
traits
combined into 12 main
traits
as shown in the right figure. when you use
ntm
as selection criteria, you obtain positive progress for all
traits
of economic importance in the dairy cattle industry. you obtain the highest progress from the ?most expensive
traits
? such as fat and protein yield and health
traits
as shown in the figure to the right. longevity index and production index have the highest correlation of all
traits
to the
ntm
, showing that the
ntm
is optimized to produce long living and high producing cows. 3
cows-fertility-production-4.html