Alta 4-EVENT KOEIEN bestaan niet bij toeval. Er is een duidelijke focus nodig op het beste dagelijkse management en een langetermijnplan voor het fokken en ontwikkelen van een gezonde, vruchtbare en productieve veestapel.
Daarom leggen wij de focus op hoe de beslissingen die u neemt over fokkerij en genetica u kunnen helpen om meer 4-EVENT COWS in uw veestapel te fokken. We stellen u twee manieren voor – plus het bewijs – dat genetica een belangrijk onderdeel van de puzzel vormt bij het onderhouden van een probleemloze winstgevende veestapel – voor nu en in de toekomst.
1. ZORG NU VOOR MEER DRACHTIGHEDEN
Wanneer u kijkt naar het vruchtbaarheidsvoordeel op inseminaties, dan zult u de focus willen leggen op de best bevruchtende stieren. Alta’s CONCEPT PLUS vruchtbaarheidsevaluatie rangschikt stieren op hun vermogen koeien drachtig te krijgen. Welke soorten sperma u ook binnen uw genetisch plan gebruikt, er zijn CONCEPT PLUS opties die passen bij uw fokdoelen.
Waarom zou u moeten vertrouwen op Alta’s CONCEPT PLUS ranglijst? Deze lijst is gebaseerd op echte drachtigheden van progressieve melkbedrijven door heel Noord Amerika. De evaluatie neemt factoren zoals onder andere aantal keer geinsemineerd, maand/seizoen, inseminator en ‘breeding code’ effecten mee.
- CONCEPT PLUS DxD – high fertility sires will give you a 2%-5% greater chance at creating a pregnancy with conventional semen.
- 511 CONCEPT PLUS – high fertility SexedULTRA sires offer a 4%-9% conception rate advantage over the average sexed bull
- CONCEPT PLUS BxD – high fertility beef x dairy sires give you a 2%-5% greater chance at creating a conventional pregnancy than the average beef bull used on dairy cows.
If you’re more familiar with sire conception rate (SCR), keep in mind that Alta’s CONCEPT PLUS evaluation is more complete, current, and consistent – and actually served as a basis for SCR. The table below compares what’s included and accounted for in each evaluation.
| Comparing sire fertility evaluations | SCR | CONCEPT PLUS |
| Based on real pregnancy check data | X | X |
| Accounts for various factors affecting fertility, including age, month, herd, service number and lactation | X | X |
| COMPLETE | ||
| Separate ratings available per semen type: conventional, sexed, and beef x dairy breedings | X | |
| Accounts for additional factors affecting fertility, like technician and breeding code effects | X | |
| Data is collected from progressive dairies in North America, and not restricted to US farms on official test | X | |
| CURRENT | ||
| Ongoing data is collected and evaluated directly from DairyComp and other herd management programs | X | |
| Updates are available every other month | X | |
| CONSISTENT | ||
| Data is gathered only from large-herd environments with progressive management and reproduction programs | X |
2. CREATE MORE FERTILE COWS FOR THE FUTURE
While sire fertility selection can get you more pregnancies, and more Alta 4-EVENT COWS now, it takes a long-term plan and genetic selection for female fertility to ensure your herd’s reproduction continues to improve.
Daughter pregnancy rate (DPR), heifer conception rate (HCR) and cow conception rate (CCR) all provide a genetic basis for creating more fertile females. Emphasizing one, or any combination, of these traits in your customized genetic plan means you are breeding a next generation of cows with a greater ability to conceive.
Daughter pregnancy rate is defined as the number of non-pregnant cows that become pregnant within each 21-day period. When a sire has a DPR of 1.0, it means that his daughters are 1% more likely than the average herdmate to become pregnant in a given 21-day window. And each added point of DPR equates to 4 fewer days open.
When referring to HCR and CCR, these traits are defined respectively as a virgin heifer or lactating cow’s ability to conceive. For each of these traits, when a sire has a value of 1.0, it means that his daughters are 1% more likely to conceive than daughters of a sire with an HCR or CCR of 0.0. While DPR is a slightly different calculation than HCR or CCR, all three are a way to measure the fertility of the female herself.
It’s clear to see that the high DPR sires, do indeed, create daughters that become pregnant more quickly than the daughters of low DPR sires.
| Lactation 1 cows | # of cows | Average Sire DPR | Actual Preg rate |
| Top 25% for highest Sire DPR | 174 | 2.3 | 27% |
| Bottom 25% for lowest Sire DPR | 137 | -1.1 | 20% |
| Difference | 3.4 | 7% |
IMPROVE FERTILITY RESULTS – NOW AND INTO THE FUTURE
If your goal is to create more Alta 4-EVENT COWS through improved fertility and reproduction, don’t miss out on the impact that genetics can make in taking you to that next level. Despite the low heritability of fertility traits like DPR, these two tips will help improve your herd’s reproductive results now and into the future:
- Improve conception rates now by using sires with the high fertility CONCEPT PLUS rating to boost your herd’s current conception rates.
- Improve fertility for the future of your herd by including DPR and/or HCR and CCR in your customized genetic plan to create a next generation of more fertile females.
