Genetic Solutions


Genetic Solutions Introduction

No two farms are the same, and no two farmers run their farms in the same way, so it makes sense that each farmer targets the type of cow they want. Farming system pressures vary depending on climate, finances, environmental impact, and of course farming systems.

CRV Ambreed’s genetic specialists work toward offering each farmer the desired genetic solution for their herd. Eczema tolerant bulls are an example of a genetic solution for a health issue. Once a day index is an example of a genetic solution for farm system need.

Facial Eczema Tolerant

Genetic tolerance offers the best protection against Facial Eczema (FE).
Using CRV Ambreed’s FE tolerant sires in your breeding programme is an environmentally friendly and safe way to help increase your herd’s tolerance to FE challenges, resulting in healthier cows and improved production.

FE costs the New Zealand dairy industry over $100 million a year in lost production, treatment costs and animal loss*, and the problem in New Zealand is worsening. AgResearch scientists have shown that the average New Zealand cow today is more susceptible to FE than her counterpart was 25 years ago.



Once-A-Day Genetics

The demands placed on a cow in the Once-A-Day (OAD) milking system vary to the more traditional twice daily system. Our OAD genetics are selected to support those demands.

CRV Ambreed focuses on protein, somatic cells and udder support traits to help increase production and feed efficiency, increase the overall longevity of your herd, breed cows with a great udder and low somatic cells, and lower your replacement rates.

The CRV Once-A-Day index ranks the sires on their suitability to be used as part of a OAD system. The higher the index, the more suitable they are.

A2/A2 Sires

The demand for A2 type Beta Casein milk is growing with investor enthusiasm for businesses in the infant formula and natural health products sectors. CRV Ambreed offers a range of A2/A2 sires specifically for farmers who wish to enter this speciality market. We can also test your current herd for A2/A2 status.

A2 type Beta Casein milk contains only the A2 type of betacasein protein rather than the more common A1 protein commonly found in regular cows’ milk. It usually takes two cow generations through tailored A2/A2 genetics (about ten years) to convert a New Zealand herd to A2/A2.

Look for sires that have A2/A2 beneath their name when browsing through this catalogue.

Siryx Sexed Semen

With SiryX sexed semen you can increase the number of heifers generated through your yearly mating programme.

SiryX sexed semen goes through a sorting process where more than 90% of the sperm cells in the straw carry the female ‘X’ chromosome and only less than 10% of the sperm carry the male ‘Y’ chromosome*. This ratio carries through to produce on average 90% heifers from the doses of sexed semen used on the farm.

Conception rates with SiryX are around 10-15% lower than non-sexed semen. Using the correct semen handling and the right selection of animals on heat will help you get the best possible results using the SiryX sexed semen product.


Polled Sires

Polled Bulls

Homozygous (PP) polled bulls guarantee the birth of polled calves meaning the progeny of the polled bulls will not need disbudding. This Saves time, expense and improves animal welfare.

Polled genetics explained

“When the bull has two copies of the polled gene (ie homozygous), you are guaranteed the bull’s progeny will all be polled as all get one copy of the poll gene. Conversely, bulls with only one copy of the polled gene are referred to as heterozygous (P) and their progeny only has a fifty percent chance of being polled.”

Since 2017 CRV Ambreed has offered a team of both local and overseas homozygous polled bulls.

Polled programme example

Y1 Homozygous bull + Dam = Polled calf (1)

Y2 Homozygous bull + Dam = Polled calf (2)

Y3 Non polled bull + Polled Dam (calf 1) = Polled calf


Short Gestation

CRV Ambreed off†ers short gestation dairy and beef to create greater value o†spring and to give your cows more days in milk.


Breed beef-cross calves that you can sell to the beef market. The gestation length of beef breeds are on average four to five days longer than dairy sires. However Short Gestation Hereford and Angus bring the calving date in line with dairy sires.


Short Gestation Dairy is a good option if you need more replacements from your tail-end cows. Short Gestation Dairy is available in Holstein Friesian, Jersey and Crossbred.



CRV Ambreed’s Fertabull helps you maximise fertility at the end of mating and get your tailend cows back in calf. Fertabull contains the semen of three sires in each dose. You have a greater chance of getting your cow in calf with Fertabull as it increases the length of time viable semen is available to fertilise the egg.

Fertabull short gestation Hereford Sires are selected for calving ease and good growth rates.