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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

Breeding Evaluations – September 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.

For more information, please see the leaflet attached or take a look at the technical note.

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.

Lleyn A4 6pp manual final dec 2013_Page_1

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.
Lleyn Survey