News in NAV genetic evaluation

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Webinar 16. september 2013
Anders Fogh og Gert Pedersen Aamand
Deltagere fra VikingGenetics og VikingDanmark

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News in NAV genetic evaluation

  1. 1. Webinar 16. september 2013 Anders Fogh og Gert Pedersen Aamand Deltagere fra VikingGenetics og VikingDanmark News in NAV genetic evaluation
  2. 2. Changes in routine evaluation from 2nd May to 13th August 2013 Genomic genetic evaluation • Reference population RDC – The 2-3 latest batches of progeny tested NRF bulls included from June 2013 • Low density chip – LD (10K) genotypes are included from July 2013 – SNPs on the X-chromosome are no longer used (earlier included for RDC and Jersey) due to problems with imputation (this change has only a small effect on results) • Change use of SNP’s – Earlier: selection of SNP’s at every run (allel frequency, ect.) – Now: Fixed SNP’s at every run News in NAV genetic evaluation Over 7500 new RDC and JER females got GEBV (mainly from VG breeding program)
  3. 3. News in NAV genetic evaluation
  4. 4. News in NAV genetic evaluation Changes in routine evaluation from 2nd May to 13th August 2013 Weight in NTM • Reduced weight on yield for cows with own yield – only if no genomic test
  5. 5. News in NAV genetic evaluation Effects of the changes 20130813:  New SNP editing caused somewhat greater differences between EBV’s in May and August compared to what is normally observed between runs. Also slightly higher standard deviations and trends for all breeds  The youngest RDC and Jersey heifers loses around 4-5 and 2-3 NTM units, respectively, compared to pedigree indices  The underestimation is also true for GEBV for NTM of young bulls due to the same calculation methodology • NAV is working to solve the probelm • To be able to make a fair comparison between NTM for females with GEBV or pedigree index, 4-5 units need to be added on the GEBV for females born from 2011 and later (add 2-3 units on GEBV for JER) • The same thing has to be considered when NTM for young bulls with GEBV are compared to proven bulls
  6. 6. News in NAV genetic evaluation Up-coming runs/publications • GEBV females: 2/9 och 2/10 • Ordinary NAV routine run: 2/11 • GEBV females: 2/12 • Interbull: 3/12
  7. 7. Spørgsmål • Hvilken betydning har det at næsten alle Man- o-man malkende døtre selv er genomisk testet. Indgår disse døtre i hans deregressed proff? • Forventes GMACE Interbull I rutine næste gang? • Hvornår forventes hundyr i referencen? • Kendes løsningen for at få testede dyr og ikke testede på samme skala for RDM og Jersey?.
  8. 8. Spørgsmål • Hvad er status mht. robot data og eksteriør? • Er planen også at imputere alle QTL på det nye LD chip til 54K (hvis man kan)? • Forventes udveksling af genotyper med Eurogenomics igen til November?

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