IT-Solutions for Animal Production. 3. März 2017 Seite 1

Transcription

1 IT-Solutions for Animal Production 3. März 2017 Seite 1

2 IT-Solutions for Animal Production Differences breeding philosophy of German RZG compared to Danish NTM Dr. Stefan Rensing Vereinigte Informationssysteme Tierhaltung w.v. (vit), Verden/Germany Anual Meeting Danish Holstein 2017, Herning, February 27th

3 Dairy cattle in Germany 12.7 Mio. cattle 4,267,000 dairy cows 673,000 suckler cows dairy cows in 79,500 farms ( 53 cows/herd) 88% milk recording 66% herdbook 90% A.I. (4.2 Mio. 1 st inseminations) breeds: 65% Holstein 25% Fleckvieh 5% Brown Swiss 5% others (incl. 1,5% crossbreds) Brown Swiss Page 3

4 Dairy cattle in Germany 12.7 Mio. cattle 4,267,000 dairy cows 673,000 suckler cows dairy cows in 79,500 farms ( 53 cows/herd) 88% milk recording 66% herdbook 90% A.I. (4.2 Mio. 1 st inseminations) breeds: 65% Holstein 25% Fleckvieh 5% Brown Swiss 5% others (incl. 1,5% crossbreds) organizational structure: regional organizations (DHI, herdbook, AI) Herdbook and A.I. mostly merged data processing mostly centralized Page 4

5 International comparison of Total Merit Indices in 2000 Page 5

6 International comparison of Total Merit Indices in Page 6

7 German Total Merit index RZG (Relativ-Zuchtwert-Gesamt) RZG DEU: relative breeding values expressed on 100/12 scale RZM milk production index F&L, Udder RZN longevity RZR Daughter fertility RZS SCS RZKm 45% milk production traits Earning traits 15% funct. conform. 40% functional traits Cost traits Relative weights according to economic importance Marginal benefit of improving 1 genetic standard deviation keeping all other traits unchanged (i.e. ceteris paribus conditions) Last revision: 2008 (dauhgter fertility +10%, production -5%, longevity -5% 3. März 2017 Seite 7

8 Nordic Total Merit NTM NTM DFS: relative breeding values expressed on 100/10 scale Y-Index milk production index Growth Udder, F&L Udder health Daughter fertility Calving mat. Calving dir. Y. stock. Sur. Longevity Other Diseas. Claw health Milking speed Temperament 29% milk + beef Earning traits 14% funct. conform. 57% functional traits Cost traits 3. März 2017 Seite 8

9 NTM RZG RZM milk production index F&L, Udder RZN longevity RZR Daughter fertility RZS SCS RZKm RZG Y-Index milk production index Growth Udder, F&L Udder health Daughter fertility Calving mat. Calving dir. Y. stock. Sur. Longevity Other Diseas. Claw health Milking speed Temperament NTM More traits included in NTM with low weight each Calving ease direct (6%) Young stock survival (5%) Other diseases (4%) Claw health (3%) Milking speed (3%) Growth (2%) Temperament (1%) More direct health traits in NTM; less longevity Ratio Production Functional traits: NTM 1:1.9 (RZG 1:0.9) Conformation traits very similar 3. März 2017 Page 9

10 Realtive weights genetic progress Relative weights do not necessarily reflect relative genetic progress in all traits because traits are genetically not independent selection for one trait may cause positive/negative changes in other traits (indirect selection response) Longevity SCS Fertility mat. CE Genetic correlations RZN RZS RZR RZKm Milk production index (RZM) ±0.00 Longevity (RZN) Udder health/scs (RZS) ±0.05 Daughter fertility (RZR) Daugh. calving ability (RZKm) Milk production traits have negative correlations to most functional traits Most functional traits have positive correlations among each other 3. März 2017 Page 10

11 Selection in practice If farmers (breeding organizations) select not the same as official TMI genetic progress in cow population remains theory Omajo (O-Man x Major) RZG 139 (#8 Dec. 2010) RZM 134 RZE 100 RZS 118 RZN 112 RZR 109 Total # offspring: 543 Braveheart (Marshall x Luke) RZG 116 (#>500 Dec. 2010) RZM 98 RZE 137 RZS 108 RZN 113 RZR 98 Total # offspring: 45, März 2017 Seite 11

12 Selection in DEU practice ᴓ EBV all used semen straws Holstein bulls (2016 until August) new RZG Genomics Something happened 2001/2002 and 2010/2011 with the used bulls 2002: negative genetic trend fertility suddenly stopped, longevity first time positive 2011: first time positive trend fertility, doubled genetic progress RZG Page 12

13 Selection in DEU practice ᴓ EBV all used semen straws Holstein bulls (2016 until August) new RZG Genomics Progress/year RZM 1,5 3,3 RZE 1,6 3,4 RZS 0,4 1,6 RZN 0,8 2,7 RZR -0,5 1,6 RZG 1,9 5,1 DEU bull from DNK Since genomics progress in all traits with RZG And more than doubled progress in RZG Progress conformation higher than expected by weight RZG Fantastic (Famous x Massey) RZG 160 (#6 Dec. 2016) RZM 152 RZE 117 RZS 126 RZN 125 RZR 100 Page 13

14 TMI: Theory versus acceptance/image TMI and all single traits on one neutral relative base = easy to compare but farmers experience is on kg, days, %, Many traits with low weight = correct as long as some economic impact but farmers often feel different (e.g. bull with low milking speed in top-10) because economic impact of many traits is not linear 3. März 2017 Seite 14

15 TMI: Selection in times of genomics How reliable are gebv for exclusively national traits (small reference)? farmers are sensitive for bulls dropping Effective pre-selection of male candidates by genomic parent average Top-100 Viking bulls by gntm For exclusive domestic traits this is only possible in own population more difficult to select in foreign populations Top-100 HOL gen. Country birth DNK 90 SWE 7 FIN 3 CAN 0 DEU 0 FRA 0 GBR 0 ITA 0 LUX 0 NLD 0 USA 0 Total 100 Top-250 DEU bulls by grzg Top-250 HOL gen. Country birth Dam country DEU DFS NLD USA CAN 4 14 GBR 3 2 LUX 2 2 FRA 1 2 ITA 1 1 Top total März 2017 Seite 15 DEU bull from DNK Bonum (Balisto x Epic) RZG 158 (#17 Dec. 2016) RZM 151 RZE 137 RZS 112 RZN 122 RZR 92

16 Selection on NTM or RZG: different results? NTM and RZG are implemented since a long time with significant differences there should be remarkable differences how the population developed but how to find out? SNP exchange of all young bulls among EuroGenomics countries independent gebv from national evaluations (not converted) foreign and domestic bulls are fully comparable 3. März 2017 Seite 16

17 Selection on NTM or RZG: different results? DFS scale DEU scale 3. März 2017 Page 17

18 Selection on NTM or RZG: different results? DFS scale DEU scale 3. März 2017 Page 18

19 Selection on NTM or RZG: different results? DFS scale DEU scale 3. März 2017 Page 19

20 Selection on NTM or RZG: different results? DFS scale DEU scale 3. März 2017 Page 20

21 Selection on NTM or RZG: different results? DFS scale 3. März 2017 Page 21

22 Selection on NTM or RZG: different results? DFS scale DEU scale 3. März 2017 Page 22

23 Selection on NTM or RZG: different results? Proportion of bulls in Top-100 EG6 t_ntm: theoretical i.e. % all bulls NTM: real No. in Top-100 DFS scale 3. März 2017 Page 23

24 Summary NTM and RZG have significant different composition Production functionality: NTM=1:2, RZG=1:0.9 Within NTM functionality many exclusive domestic traits ( 15% of NTM) With RZG being more similar to TMI in other main Holstein countries than NTM Differences in TMI/breeding philosophy have resulted in genetic differentiation of Holstein (bull) populations: DFS higher Fertility Calving Udder health (Longevity) (Fat) DFS lower Milk Frame Udder (Feed&Legs) Bull selection is more focused on national population in DFS Probably because of different traits/goal and selection base for this 3. März 2017 Page 24

25 IT-Solutions for Animal Production Thanks and hope you want to discuss! 3. März 2017 Seite 25

26 NTM RZG RZM milk production index F&L, Udder RZN longevity RZR Daughter fertility RZS SCS RZKm RZG Y-Index milk production index Growth Udder, F&L Udder health Daughter fertility Calving mat. Calving dir. Y. stock. Sur. Longevity Other Diseas. Claw health Milking speed Temperament NTM More traits included in NTM with low weight each Calving ease direct (6%) Young stock survival (5%) Other diseases (4%) Claw health (3%) Milking speed (3%) Growth (2%) Temperament (1%) More direct health traits in NTM; less longevity Ratio Production Functional traits: NTM 1:1.9 (RZG 1:0.9) Conformation traits very similar 3. März 2017 Page 26