Table 1. Analysis of Five Haplotypes Affecting Fertility
| Haplotype | Chromosome | Frequency | Earliest Known Ancestor(s) | Impact on CR | Impact on 60-day NR |
| BH1 | 7 | 14.0% | West Lawn Stretch Improver | -3.4% | -2.5% |
| HH1 | 5 | 4.5% | Pawnee Farm Arlinda Chief | -3.1% | -1.1% |
| HH2 | 1 | 4.6% | Willowholme Mark Anthony | -3.0% | -1.7% |
| HH3 | 8 | 4.7% | Gray View Skyliner Glendell Arlinda Chief |
-3.2% | -3.1% |
| JH1 | 15 | 23.4% | Observer Chocolate Soldier | -3.7% | -3.7% |
Table 2. Scenario for Economic Loss from Haplotypes Impacting Fertility
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If 20% of cows in the herd carry the haplotypes |
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For every 100 matings, 20 cows carry haplotype |
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1/2 or 10 of their eggs carry haplotype |
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1/2 or 5 of the resulting embryos mated to a carrier bull and are homozygous for haplotype |
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Homozygous embryos lost at 5-10 days of gestation |
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Each of 5 cows will have an increase of approximately 30 days open |
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Cost per extra day open is $2 |
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Total economic loss per 100 matings: 5 cows x 30 days per cow x $2 per day = $300, or about $3 per mating |
