2012/13 - GGI German Genetics International GmbH
2012/13 - GGI German Genetics International GmbH
2012/13 - GGI German Genetics International GmbH
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Definitions<br />
In the following part you will find a caption to the common abbreviations being<br />
used in this catalogue as well as a graphic, explaining the composition of the<br />
Total Merit Index RZG.<br />
69<br />
Complex<br />
Milk production<br />
RZM<br />
(45%)<br />
Protein-kg (75%)<br />
Fat-kg (20%)<br />
Protein-% (5%)<br />
RZFit<br />
Complex<br />
Fertility<br />
RZR<br />
(10%)<br />
4 conception traits<br />
(75%)<br />
Calving to first insemination<br />
(25%)<br />
Complex<br />
Longevity<br />
RZN<br />
(20%)<br />
Functional herdlife<br />
Auxiliary traits<br />
<strong>German</strong> Total Merit Index<br />
RZG for Holsteins<br />
Complex<br />
Udder health<br />
RZS<br />
(7%)<br />
Somatic cell count<br />
<strong>German</strong> <strong>Genetics</strong> <strong>International</strong> <strong>GmbH</strong><br />
Complex<br />
Conformation<br />
(15%)<br />
Feet & legs (50%)<br />
Udder (50%)<br />
Linear traits and<br />
scores each<br />
Complex<br />
Calving traits<br />
RZKm<br />
(3%)<br />
Calving ease (50%)<br />
Stillbirths (50%)<br />
Abbreviations:<br />
HB-No. Herd book number<br />
Rel.% Reliability as a percentage<br />
TL Free from genetic defect BLAD<br />
TV Free from genetic defect CVM<br />
TY Free from genetic defect Brachyspina<br />
BY Carrier of the genetic defect<br />
Brachyspina<br />
RZE Breeding value Conformation<br />
RZG Total Merit Index<br />
RZM Breeding value Milk production<br />
RZN Breeding value Longevity<br />
RZR Breeding value Reproduction<br />
RZS Breeding value Udder health (somatic<br />
cell score)<br />
RZD Breeding value Milkability<br />
RZFit Breeding value Fitness<br />
RZKd Breeding value Calving ease (paternal<br />
calving ease)<br />
RZKm Breeding value Calving ease (maternal<br />
calving ease)<br />
aAa Triple A code by Weeks® Animal<br />
Analysis<br />
Since August 2009, the vit has been evaluating a combined fitness index. Using the RZFit, it is possible to find the bulls with the<br />
best fitness traits from the very large number of proven Holstein bulls. <strong>German</strong> Holstein breeding offers bulls that transmit very positively<br />
in this complex and consequently bring adequate<br />
Longevity<br />
improvement.<br />
Feet and legs<br />
15%<br />
(RZN)<br />
15%<br />
Milk yield<br />
(RZM)10%<br />
Daughter fertility and calving traits have the highest<br />
weighting in the RZFit with 20 % each,<br />
followed by longevity with 15 %. Regarding<br />
Daughter fertility<br />
(RZR)<br />
Udder<br />
10%<br />
maternal calving traits, calving ease and still<br />
birth are weighted the same. As most fitness<br />
20%<br />
Maternal<br />
calving traits<br />
Udder health<br />
10%<br />
traits and milk yield are correlated negatively,<br />
the production traits are weighted with 10 % in<br />
(RZKm) 20%<br />
the RZFit. This proved to be a good decision.<br />
Consequently, top bulls in RZFit have on average an<br />
RZM of nearly 100.
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