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December 2011 elite cow and heifer statistics
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Determination of elite or high-ranking grade status was based on a
two-stage screening procedure. The first-stage screening criteria for
eligibility were:
- Management groups included lactations of at least three other cows
when averaged across a cow's lactations.
- Last calving was within 2 years and 3 months of current evaluation date.
- Last record was either in progress (code R) or had a termination
code of 0 (blank), 1, 2, or 8.
- First lactation was not predominantly owner-sampler type of
test.
- Reliability of milk evaluation was at least 30%.
OR
- The animal includes genomic evaluation information
Summary information for eligible (those passing first-stage screening)
registered cows are in Table 1.
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Table 1. Mean predicted transmitting abilities
(PTAs) for milk, fat, protein, productive life (PL), somatic cell score (SCS),
and net merit (NM) for registered1 cows passing first-stage screening.
| 7,204 |
49 |
78 |
2.9 |
1.5 |
2.98 |
0.7 |
0.14 |
| 20,220 |
75 |
54 |
2.8 |
2.1 |
2.97 |
1.2 |
0.20 |
| 6,939 |
66 |
45 |
3.3 |
1.3 |
2.98 |
1.1 |
0.09 |
| 652,372 |
97 |
121 |
6.4 |
4.4 |
2.94 |
0.9 |
-0.11 |
| 183,697 |
82 |
113 |
9.2 |
5.0 |
3.00 |
0.9 |
0.08 |
| 3,989 |
88 |
310 |
13.3 |
9.8 |
3.02 |
0.4 |
0.15 |
| 1,356 |
-10 |
-417 |
-6.8 |
-9.6 |
2.99 |
0.8 |
0.49 |
1Includes cows in an identity enrollment program for some breeds.
2Includes genomically evaluated heifers
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Table 2.
Standard deviations of PTAs for milk, fat, protein, PL, SCS, and NM for registered1
cows passing first-stage screening.
| 7,204 |
+/- 143 |
+/- 503 |
+/- 19 |
+/- 15 |
+/- 0.14 |
+/- 1.8 |
+/- 0.7 |
| 20,220 |
+/- 165 |
+/- 441 |
+/- 16 |
+/- 13 |
+/- 0.12 |
+/- 2.5 |
+/- 1 |
| 6,939 |
+/- 157 |
+/- 569 |
+/- 21 |
+/- 16 |
+/- 0.14 |
+/- 2.1 |
+/- 1 |
| 652,372 |
+/- 173 |
+/- 610 |
+/- 23 |
+/- 17 |
+/- 0.14 |
+/- 1.7 |
+/- 1 |
| 183,697 |
+/- 144 |
+/- 566 |
+/- 22 |
+/- 17 |
+/- 0.11 |
+/- 1.5 |
+/- 0.7 |
| 3,989 |
+/- 162 |
+/- 619 |
+/- 25 |
+/- 19 |
+/- 0.13 |
+/- 1.4 |
+/- 0.7 |
| 1,356 |
+/- 133 |
+/- 591 |
+/- 19 |
+/- 15 |
+/- 0.12 |
+/- 1.4 |
+/- 1 |
1Includes cows in an identity enrollment program for some breeds.
2Includes genomically evaluated heifers
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For registered eligible cows, a percentile table for each breed was
constructed based on NM. Those percentile tables are provided with USDA-DHIA
evaluations for active artificial-insemination bulls. A percentile was assigned for each cow with
data distributed in format 105. Although the data for Red and White cows are
combined with those for Holstein cows for genetic evaluations, a separate
percentile was used for screening Red and White cows
for elite or high-ranking grade status. The second-stage screening criterion was the
NM corresponding to a specified minimum percentile (Table 3).
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Table 3.
Percentiles and corresponding NM for a cow to be designated as elite or a high-ranking grade and numbers by breed.
| 98 |
354 |
145 |
5,880 |
| 98 |
404 |
433 |
705 |
| 98 |
397 |
135 |
265 |
| 99 |
447 |
20,309 |
10,872 |
| 99 |
377 |
3,686 |
3,257 |
| 97 |
414 |
114 |
310 |
| 97 |
232 |
495 |
93 |
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