80HO338 Browndale
Macnut PP
aAa: 243165 | BC: A2/A2
99% Reg: CAN000012727329 | DOB: 02/17/2017
- A2/A2
- Homozygous Polled
- Outcross maternal line
- Great Transmitting Family
- Proven Breeder with Milking Daughters in Canada
Macnut PP Daughter:
Browndale Macnut P NIcky (GP-83)
Macnut PP Daughter Group:
VG-86, VG-86, GP-84, VG-85
All projected over 22,000 lbs 1st lactation
Dam of Macnut PP:
Hulsdale B Science Malaki P (EX-91 4Yr)
2nd Dam of Macnut PP:
Hulsdale B Windbrook Mahalo (EX-93 3E)
| Sire: | Stantons Adagio-P |
|---|---|
| Dam: | Hulsdale B Science Malaki P (EX-91 4Yr) |
| 2nd Dam: | Hulsdale B Windbrook Mahalo (EX-93 3E) |
| 3rd Dam: | Hulsdale B Denzel Maui (VG-87 3Yr) |
| 4th Dam: | Hulsdale B Goldwyn Makenzie (VG-87 3Yr) |
comparable PTAT bulls
305-AA is the standardized milk, fat, and protein yield estimate used by CDCB to compare cows of different ages, parities, breeds, and regions on equal footing. According to CDCB and USDA AGIL, it represents “a 305-day lactation record at 36 months of age” — hence “Average Age,” or AA.
It replaced 305-ME (Mature Equivalent) in June 2024 for published records and was implemented in the calculation of CDCB genetic evaluations effective August 13, 2024. ME had been the standard since 1935.
How it is calculated
The new factors are applied as a series of separate multipliers for age-parity, season, previous days open, and milking frequency. Lactation records are adjusted upward or downward to what the cow would have been expected to produce as a 36-month-old, milked twice daily for 305 days.
Key adjustments include:
- Age-parity: Standardized to 36 months rather than ME’s mature range of 61–86 months depending on breed.
- Season/climate: Seasonal effects are now estimated within five regions defined by the average climate zone scores for each state, replacing the old three east-to-west geographic regions.
- Milking frequency: Still standardized to 2x milking, unchanged from ME.
- Previous days open: The methodology for this adjustment is also unchanged from ME.
Sources: CDCB/USDA AGIL, “August 2024 Evaluations: What’s New?” (July 11, 2024); CDCB, “Introducing 305-AA: The New Standardized Yield Measurement” (June 21, 2024).