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Sire Viking Red may 2014
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26 1. what is
ntm
? ntm (nordic total merit) is the most complete total merit index
in the world. ntm consists of more than 40 subtraits
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 he 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. understand the benefit from high ntm ? increased profit! daughter fertility days open reduced by 6.6 days and 0.08 less services per pregnancy calvings, sire (maiden heifers) reduction in difficult calvings with 2 % and 1 % less stillborn calves calvings, maternal (maiden heifers) reduction in difficult calvings with 2.5 % and 1 % less stillborn calves udder health 1.5 % units less mastitis treatments in first lactation. 2.5 % units less mastitis treatments in second and third lactation other diseases 1.5% units less treatments for reproduction diseases, metabolic disorders and diseases in hooves, feet and legs in first and second lactation. 2.5 % units less treatments for the same diseases in third lactation milking speed 9.5 g fat + protein more per minute (robots and farmer observation) longevity 34 days longer productive life milk index + 219 kg milk fat index + 9.9 kg fat fat percentage + 0.12 % protein index + 7.2 kg protein protein percentage + 0.08 % growth + 11 g/day. higher weight gain of bull calves calculation of production index - 0.25 x milk + 0.25 x fat + 1 x protein 3. the value of ntm units the value of +10 ntm units for the sire is the same as 100 euro added value for the heifer under scandinavian conditions. 34.1% 13.6% 2.1% 100 90 80 70 110 120 130 0.1% 34.1% 13.6% 2.1% 0.1% 2. 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 away from the mean in either direction (the purple area) accounts for about 68 % of the bulls. the value of +10 units for production traits the value of +10 units for functional traits weight of main traits in ntm.
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