Thinking of buying a recorded Lleyn?
- See our Lleyn Factsheet
Genetic Parameters for Parasite Traits
Following work by the PRLB group, genetic parameters for parasite traits have been re-estimated. Details here.
Lleyn Connectedness Run – January 2019
This Excel sheet shows the connectedness (genetic linkage) between individual flocks within the breed analysis. Whilst colour categories show the degree of linkage between flocks as being adequate (green), limited (amber) and low (red) the most important aspect of this report is the relative ranking of flocks to each other – something that can be deduced from looking at this table.
For more information about connectedness click here.
PRLB Worcester 1st October 2018
Lleyn Reports 2018
Please note that publication criteria are still to be implemented in reports for new traits. When completed, trait EBVs will not show for individuals who have accuracy values below the thresholds shown below:
FEC (Combined) – 50% / FEC S – 50% / FEC N – 50% / Saliva IgA – 50% / Lamb Survival – 50% / Lambing Interval – 30% / Age at First Lambing – 40% / Longevity – 25%
Breeding Evaluations – October 2018
- Lleyn – Breed benchmark 2018
- Lleyn – Breed Genetic Trends October 2018
- Lleyn – Breeder Listing October 2018
- Lleyn – High Five Lambs October 2018
- Lleyn – High Five Shearlings October 2018
- Lleyn – Top Ram Lambs October 2018
- Lleyn – Top Stock Sires October 2018
Breeding Evaluations – September 2018
- Lleyn – Breeder Listing September 2018
- Lleyn – Breed Genetic Trends September 2018
- Lleyn – High Five Rams September 2018
- Lleyn – High Five Shearling Rams September 2018
- Lleyn – Lleyn Top Ram Lambs September 2018
- Lleyn – Top Stock Sires September 20108
- Lleyn – Breed Benchmark 2018
Go back to Latest Reports
The New Lleyn Index
The new Lleyn index is now live for 2017 breeding evaluations. The change follows close discussions with breeders and several changes to the EBVs generated for Lleyn evaluations.
The new index focuses on optimising, rather than maximising traits by continuing to improve maternal ability, lamb growth rate and muscling but also rewarding sheep with ‘optimum prolificacy’, controlling ewe mature size and penalising the leanest breeding lines in addition to the fattest.
The new index will be shown on reports instead of the previous maternal and carcase+ index. Individual EBVs will still be visible so breeders can continue to use these how they wish.
We expect changes in animal rankings, it is important not to compare the new index value with previous indexes.
Lleyn Meeting – 16th November 2016
Click on the links below to see the presentation from the Lleyn update meeting that took place mid-November in Exeter. The new Lleyn connectedness run is also available below showing linkage levels between Signet recorded flocks.
Lleyn Meeting – 3rd October 2016
Click on the links below to look at the technical note for the new Lleyn Index and to see slides from Sam Boon for an update on Signet activity and the new index.
It Pays to Record – Performance Recorded Lleyn Sheep Manual
Click on the image below to read case studies from Signet recorded flocks to see how they profit from performance.
Performance Recording Lleyn Sheep Survey Summary
The PDF file below is a summary of the Performance Recording Lleyn Sheep Survey that Signet sent out to all performance recorded Lleyn breeders earlier in the year.
In this section
- Technical Information
- Why is Genetic Improvement Important?
- Selecting the Right Ram
- Estimated Breeding Values
- Interpreting Estimated Breeding Values
- Breeding Indexes
- Accuracy Values
- Ultrasound Scanning
- Computed Tomography (CT) Scanning
- Ram Buying Tips
- Performance Recording your Pedigree flock
- Electronic Data Transfer
- Downloading EBV's from the Internet
- Inbreeding - How to Manage it
- Inbreeding - Publications and Resources
- Recessive Inherited Diseases
- On-line Training Package
- Filling in your Ram Sale Cards
- Marketing Breeding Sheep for Better Returns
- Breeding Fit for Purpose Rams - a Blueprint for Breeders
- Print EBV Sale Charts Online
- Recording Lambing Ease and Birth Weight