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RamCompare fifth year results press release

Identifying traits from performance recorded rams to drive flock productivity

The fifth-year results from the RamCompare project reveal how rams with key breeding traits can drive productivity and optimise flock profitability. Read the full report here

The breeding research project demonstrates how commercial producers can use specific estimated breeding values (EBVs) to identify rams with a high genetic potential and prove their worth when assessing financial impact.

Phase II of the RamCompare project was completed in December 2020 and funding has recently been announced to develop a third phase of the project over the next five years.

RamCompare uses nominated performance-recorded rams from various terminal sire breeds on commercial farms across the UK. To date, this joint levy funded project has recorded the performance of over 26,000 lambs sired by 280 rams through artificial insemination (AI) and natural mating over five breeding seasons.

Once again, the latest update shows a great spread of rams among the most recent lists of trait leaders. Signet Breeding Manager, Sam Boon, urges breeders to focus on those traits that deliver the greatest profit to their system and source recorded rams with the right EBVs to deliver them.

“Within the groups of high genetic merit sires used we have identified differences in progeny values worth £4-£6 per lamb, providing farmers with the opportunity to enhance flock profitability through careful ram selection. This equates to £1200-£1500 per ram during their working lifetime. Few rams can do it all; some will excel for carcase conformation, others for speed of finish. Producers should therefore evaluate their system and determine which sires have the potential to make the biggest financial impact.”

Despite the challenges that arose in 2020 with the outbreak of Covid-19, the project was still able to complete full abattoir datasets from each farm and collect ultrasound scanning data from most of them. Unfortunately, due to the restrictions, the Shearforce evaluations were not able to be completed this season. The Shearforce breeding value provides an indication of meat tenderness and this table will be updated later when access to the lab can resume.

With thanks to the dedication displayed by Dunbia and Randall Parker throughout the past five years, carcases have been dissected to assess primal yields at a fixed weight to provide specific breeding values for the carcase weights, front, middle and haunch.

The UK sheep industry shows an extensive range of genetic variation with a wealth of opportunities, with six different breeds topping at least one of the RamCompare leader tables. Ultimately, decisions on commercial farms should reflect the profitability of each trait to the enterprise – and this varies with production systems and end market. RamCompare clearly shows the benefit of EBV based ram selection to enhance those traits on which producers are paid.

View the full results online at where there is also a range of case studies which show how ram purchase decisions influence outcomes at farm level. The key findings are shown as an economic value to demonstrate the financial gain achieved on these commercial systems due to careful ram selection.

Buyers can access the RamCompare data online to see a ram’s genetic ranking for specific traits such as scan weight (growth rate) or muscle depth. Signet recorded stock can be found at, which provides lists of sheep for sale, as well as “Flock Finder” which indicates performance recorded flocks located nearby.

Listen to our update

For more information

For more information on the RamCompare project, including a downloadable copy of the latest results, please visit

This work is led by Samuel Boon and Bridget Lloyd. For further information please contact the AHDB Beef & Lamb marketing communications team [email protected]


Notes for editors:

Among the leading sires for the 2020 lamb crop:

  • Scan weight EBV (speed of growth) - Hampshire Down (18U1600407) bred by D Smith & J Atkinson and provided by Stuart Friswell is the leading ram
  • Days to Slaughter EBV - Hampshire Down (27Z1700622) bred by C M Brant and Son, maintains his top spot with a number of other Hampshire Down, Meatlinc and Charollais sires also featured
  • Overall Carcase Merit Index and Carcase Weight EBVs - the top two sires include Texel rams, Callerton Bugatti (SRC1800618) in first place, bred by M D Sym, nominated by Matt Hobbs followed by Strathbogie Youi (IJS1600756) bred by James Innes & sons, provided by the Claybury flock. The above two rams also place highly in the top five Texel’s for Carcase Conformation EBV with Strathbogie Youi, holding the top spot for the breed
  • Carcase Conformation EBV – Foulrice Tempest (18DG08105), bred by C W Marwood and son, provided by Andrew Walton (ChazCompare) is overall trait leader with a group of six other Charollais rams, bred by the Foulrice, Lowerye, Redhill and Rainbow flocks within this leading table
  • AI linkage sire - a number of rams perform well for several economically important traits, such as carcase weight and conformation. A great example of this is Charollais sire, Dalby Ranieri (16PE04907), bred by Charles Sercombe and provided as the linkage ram for the 2020 lamb season. Born in 2016 this sire has shown his worth through his progeny and is one of the top five Charollais for Overall Carcase Merit and Carcase Weight EBV this year, sitting in the top 5% of Signets Terminal Sire Evaluation.
  • Haunch Weight EBV (gigot) - Texel ram Antur Boomer (AAA1812526) from the University of Wales Aberystwyth provided the greatest weight of meat in the haunch section
  • Middle (loin) Weight EBV (muscle across the loin) - Southdown (883:170545) from Rob Beaumont who holds onto his top spot for this trait for a second year, with another Southdown, provided by Patrick Goldsworthy joining him in this top table. Several Hampshire Downs also feature strongly in trait.
  • Front Weight EBV (shoulder) - Texel ram bred by W K & C A Martyn, Barnage flock (MWB1802626) provided the greatest weight of meat in the shoulder section

About the author

Bridget Lloyd

Bridget Lloyd

Bridget Lloyd – RamCompare Project Coordinator

After finishing university, Bridget worked on two well-known sheep research projects operating out of Aberystwyth University; the Longwool project and the Welsh Sheep Strategy.

In the year 2000, Bridget took a leading role in Cymru Breeding Services, (later Innovis and now known as AB Europe). Bridget was centre manager specialising in ovine fertility, operating a stud for 100 rams and coordinating four vet teams. She has specialised in ovine fertility and has worked closely with pedigree sheep and their breeders throughout her career.

With an extensive background in the sheep industry she now runs RamCompare. Her main responsibility is to liaise with project farms and abattoirs to ensure the data submitted is accurate and delivered on time, as well as co-ordinating the communication plan and ram nominations....and hundreds of other things.