Progeny Tests

Video: the value of Next Generation Sites > Results Archive > Presentation July 2016: CPT Review >

A progeny test is used to benchmark the performance of a ram by comparing how his progeny perform under the same environmental conditions relative to progeny from other rams. In this way, rams can be compared across different flocks as these reference sires create genetic connections between flocks.

Running a progeny test at one location – a “central progeny test” – facilitates comparisons of rams that would not normally be made in industry. It is also an opportunity to use provide a practical resource for genetic research development.

The linkages created by the B+LNZ Genetics Sheep Progeny Test underpin NZGE – the weekly large-scale across-flock and across-breed evaluation.

Sheep Progeny Test sites

There are two types of sites:

1) Hub sites focus on flock connectedness that underpins across-industry genetic evaluation.
Hub flocks also provide connectedness between Next Generation flocks,  a resource for genetics research as well as add-on innovative projects.

2) Next Generation sites build stronger connections with ram breeding flocks in the industry.
Each Next Generation site focuses on either a breed type or specialist challenge relevant to the land type and geographical location. 

Breed versus ram comparison

The Sheep Progeny Test was not set up as a “breed comparison”, but rather as a “ram comparison”. It has focused on what are considered to be better genetics. Breed comparisons require testing of many sires per breed, selected at random from within each breed, and with fewer progeny per sire. The progeny test has used a small number of sires with more progeny per sire, from as many breeds as possible to improve genetic linkage within the New Zealand Sheep Industry.

Rams submissions for 2020 mating

The Hub sites and the Next Generation Low-input site are accepting rams for the 2020 season. 

  • Hub Site, Glenside Station (North Island) & Invermay (South Island)
  • Low-input site, Orari Gorge

To submit a ram, please fill out an Expression of Interest form

More information about submitting rams, Important dates, logistics and costs can be found here: More information 

Ram Supply Agreement


Progeny Test Results

Hub Site Annual Report 2016-2019 (pdf)

PML Progeny Test results: Terminal/Meat Quality (Feb 2019)

Results archive