Stillbirth, Longevity and Fertility Update

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Report to the National Association Breeders Dairy Sire Evaluation Committee on research on stillbirth and related fitness traits.

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Stillbirth, Longevity and Fertility Update

  1. 1. 200 5 John Cole and Paul VanRadenJohn Cole and Paul VanRaden Animal Improvement Programs Laboratory Agricultural Research Service, USDA, Beltsville, MD jcole@aipl.arsusda.gov Stillbirth, Longevity andStillbirth, Longevity and Fertility UpdateFertility Update
  2. 2. NAAB Dairy Sire Evaluation Committee 2005 (2) P.M. VanRaden 200 5 Trait DefinitionTrait Definition  Percent stillbirths in heifers (%SBH), analagous to calving ease (%DBH)  Bases are stillbirths in heifers having bulls  Direct: 11.6% (bulls born in 2000)  Maternal: 13.6% (bulls born in 1995)  Provides “worst case” estimates  Alternative definitions  Calf livability = 100 - %SBH
  3. 3. NAAB Dairy Sire Evaluation Committee 2005 (3) P.M. VanRaden 200 5 Stillbirth Scores by ParityStillbirth Scores by Parity Stillbirth Score Parity 0 1 2 3 Total 1 491,452 1,340,329 156,464 9033 1,997,368 2 507,370 1,593,228 74,708 7564 2,182,870 3 759,371 2,414,472 117,505 12,723 3,304,017 Total 1,758,283 5,384,029 348,677 29,320 7,484,309
  4. 4. NAAB Dairy Sire Evaluation Committee 2005 (4) P.M. VanRaden 200 5 Distribution of PTADistribution of PTA 7 8 9 10 11 12 13 14 15 16 17 18 19 20 >20 0 5 10 15 20 25 30 35 40 45 50 Direct Maternal %SBH PercentageofScores
  5. 5. NAAB Dairy Sire Evaluation Committee 2005 (5) P.M. VanRaden 200 5 Distribution of ReliabilitiesDistribution of Reliabilities <=45 46-50 51-55 56-60 61-65 66-70 71-75 76-80 81-85 86-90 91-95 96-99 0 10 20 30 40 50 60 70 80 Direct Maternal Reliability Percentage
  6. 6. NAAB Dairy Sire Evaluation Committee 2005 (6) P.M. VanRaden 200 5 Product-Moment CorrelationsProduct-Moment Correlations (99% Rel, n = 571)(99% Rel, n = 571) Maternal SB Direct CE Maternal CE Direct SB 0.28 0.67 0.29 Maternal SB 0.25 0.63 Direct CE 0.46
  7. 7. NAAB Dairy Sire Evaluation Committee 2005 (7) P.M. VanRaden 200 5 Genetic correlations amongGenetic correlations among Interbull evaluations for stillbirthInterbull evaluations for stillbirth1,21,2 1 Direct stillbirth above the diagonal, maternal stillbirth below the diagonal. 2 Correlations with the USA use calving ease as a proxy for stillbirth. CHE DNK FIN NLD SWE USA CHE 0.71 0.77 0.61 0.66 0.55 DNK 0.78 0.87 0.66 0.93 0.76 FIN 0.76 0.80 0.64 0.85 0.68 NLD 0.80 0.81 0.75 0.66 0.45 SWE 0.81 0.89 0.90 0.62 0.64 USA 0.47 0.50 0.77 0.78 0.67
  8. 8. NAAB Dairy Sire Evaluation Committee 2005 (8) P.M. VanRaden 200 5 Correlations among domestic andCorrelations among domestic and Interbull stillbirth solutionsInterbull stillbirth solutions ((≥≥ 90% Rel)90% Rel) Direct Maternal CHE 0.90 0.85 DNK 0.78 0.75 FIN 0.65 0.96 NLD 0.71 0.69 SWE 0.63 0.89
  9. 9. NAAB Dairy Sire Evaluation Committee 2005 (9) P.M. VanRaden 200 5 Calf LivabilityCalf Livability
  10. 10. NAAB Dairy Sire Evaluation Committee 2005 (10) P.M. VanRaden 200 5 Flat PL CreditsFlat PL Credits 20 3 4 51 Years 20 140 40 60 80 100 120 0 Credit(%) 321
  11. 11. NAAB Dairy Sire Evaluation Committee 2005 (11) P.M. VanRaden 200 5 Lactation Curve PL CreditsLactation Curve PL Credits 20 3 4 51 Years 20 140 40 60 80 100 120 0 Credit(%) 321
  12. 12. NAAB Dairy Sire Evaluation Committee 2005 (12) P.M. VanRaden 200 5 PL Heritabilities and CorrelationsPL Heritabilities and Correlations h2 10 12 None None +calf Lac curves 10 mo .073 .998 .957 .963 .989 12 mo .069 .956 .961 .989 No limit .067 .992 .991 None+calf .068 .995 Lac curves .070
  13. 13. NAAB Dairy Sire Evaluation Committee 2005 (13) P.M. VanRaden 200 5 Correlation of PL, Other TraitsCorrelation of PL, Other Traits PTA of bulls born since 1995PTA of bulls born since 1995 Pro SCS DPR Udd Feet / Leg Size DCE Flat, 305 .07 -.28 .59 .12 .04 -.20 -.26 Curves .10 -.30 .51 .12 .05 -.21 -.27
  14. 14. NAAB Dairy Sire Evaluation Committee 2005 (14) P.M. VanRaden 200 5 PL QuestionsPL Questions  Flat or lactation curve credits?  Use data at 40 instead of 36 mo?  Adjust for inbreeding? • Curve definition passes trend tests with or without adjustment  Increase SD by 1.43?  Test in March, implement in May?
  15. 15. NAAB Dairy Sire Evaluation Committee 2005 (15) P.M. VanRaden 200 5 Days Open Genetic CorrelationsDays Open Genetic Correlations Jorjani, 2005 Interbull BulletinJorjani, 2005 Interbull Bulletin DFS ESP GBR IRL NLD NZL USA DFS .91 .91 .75 .93 .76 .91 ESP .91 .89 .82 .90 .83 .93 GBR .91 .89 .84 .96 .84 .85 IRL .75 .82 .84 .80 .70 .80 NLD .93 .90 .96 .80 .83 .88 NZL .76 .83 .84 .85 .83 .73 USA .91 .93 .85 .80 .88 .73 DFS = Denmark-Finland-Sweden
  16. 16. NAAB Dairy Sire Evaluation Committee 2005 (16) P.M. VanRaden 200 5 Daughter Conception RateDaughter Conception Rate Genetic CorrelationsGenetic Correlations Jorjani, 2005 Interbull BulletinJorjani, 2005 Interbull Bulletin CAN DEU DFS FRA ISR NLD CAN .90 .80 .78 .72 .70 DEU .90 .72 .92 .65 .47 DFS .80 .72 .75 .96 .62 FRA .78 .92 .75 .70 .42 ISR .72 .65 .96 .70 .64 NLD .70 .47 .62 .42 .64 DFS = Denmark-Finland-Sweden
  17. 17. NAAB Dairy Sire Evaluation Committee 2005 (17) P.M. VanRaden 200 5 Have Computer, Need DataHave Computer, Need Data

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