Paul VanRadenAnimal Improvement Programs LaboratoryBeltsville, MD, USApaul@aipl.arsusda.gov

2004

2004

2004

NAAB Update:Base Change, Udder

Health, Longevity, Fertility

NAAB DSEC (2) P.M. VanRaden200

4200

4

Genetic Gain 1995-2000

HO JE BS GU AY MS

Protein 19 16 16 12 8 6

Fat 18 16 20 16 9 6

Milk 588

448

480

426 259

233

Prod. Life

.3 .4 .4 .2 .2 .6

SCS .01 .01 -.04

.02 -.01

.02

DPR -.1 -.2 -.2 -.2 .0 .0

NAAB DSEC (3) P.M. VanRaden200

4200

4

SCS and DPR Breed Means

HO JE BS GU AY MS

1995 SCS3.10

3.31

3.09

3.21

2.93

3.03

2000 SCS3.09

3.34

2.94

3.31

2.97

3.07

SCS mean diff.

-.01 .03

-.15 .10 .04 .04

1995 cow DPR .4 .2 .6 -.3 -.1 .5

DPR change -.3 .0 -.4 .5 .1 -.5

NAAB DSEC (4) P.M. VanRaden200

4200

4

Udder Health Scales

Ctry Unit

Mean

SD Dir Ctry Unit

Mean

SD Dir

USA PTA 3.1 .22

- NLD RBV

100 4 +

CAN PTA 3.0 .25

- DNK RBV

100 5 +

BEL EBV 3.0 .47

- SWE RBV

100 7 +

JPN EBV 2.4 .42

- DEU RBV

100 12 +

AUS EBV 0 .11

- ITA STA 4 1 +

GBR PTA 0 13 - FRA STA 0 1 +

HUN STA 0 1 - ESP STA 0 1 +

NAAB DSEC (5) P.M. VanRaden200

4200

4

Convert SCS to Udder Health?

PTA UH = -5 (PTA SCS – breed avg)

Reversed scale with mean 0, SD 1 Interpreted like linear trait STA’s Positive numbers are favorable Range similar to DPR, PL

Udder Health is term of Interbull

NAAB DSEC (6) P.M. VanRaden200

4200

4

Longevity Trend Testing

USA Method 2 results (DYD trend) HO bias = -.006, < limit = .035 BS, GU bias (-.035, .032) near limit JE, AY bias (-.072, -.089) over limit

Method 3 (data cutoff) OK for HO

Interbull rejected 5 of 15 countries

NAAB DSEC (7) P.M. VanRaden200

4200

4

Use of MACE Longevity

Compare USA and MACE REL MACE for single-trait (direct) PL

only AIPL then combines other trait info Label multi-trait PL as MACE

Get foreign bull DPR from MACE PL

Better PL implies better DPR Predict foreign DPR from PL, SCS,

etc

NAAB DSEC (8) P.M. VanRaden200

4200

4

Single vs Multi-Trait PL

Used Nov ‘01 to predict Feb ’04 PTA PL 5% benefit expected, 3% observed

547 bulls born >1995 (before vs after 1st crop daus)

.1 decline in multi-trait PTA PL

3% benefit expected, 1% observed309 bulls born 1992-94 (1st vs 2nd crop daus).4 decline in multi-trait PTA PL

Yield correlations have been reduced

Fertility correlation now included

NAAB DSEC (9) P.M. VanRaden200

4200

4

Cows Sold Before 1st Test

Some contribute to PL (since 2004)

Database modified to store fresh dates with 0 tests (like heifers)

1 DRPC does not receive these, may be partial reporting (also CE?)

PL daus > milk daus for more bulls

NAAB DSEC (10) P.M. VanRaden200

4200

4

Yield Trait Scales

Age-parity adjustments differ 16 of 25 countries adjust to average

parity 5 adjust to mature, 4 adjust to 1st parity Separate lactation proofs available

True protein in 5 of 21 countries: AUS, FRA, HUN, POL, USA (as of 2000) True% = Crude% - .19 (e.g. 3.00% vs

3.19%) Protein yield (kg) reduced by 5-6%

NAAB DSEC (11) P.M. VanRaden200

4200

4

Adjust Yield to Average Age?

Proposed by USDA in 1994 Recommended by Holstein GAC, Oct 1994 Vetoed by Council “to allow the industry

time to consider the nature and effect of such a change.”

Mature EBV kg = 36 mo PTA lb PTA lb / EBV kg = 2.2 / 2 = 1.1 Reduced age divides by 1.1 New Holstein base SD will multiply by

1.11 Other breed SD increase by 1.05 to 1.18

NAAB DSEC (12) P.M. VanRaden200

4200

4

Conformation Scales

Standardized Transmitting Ability Mean = 0, SD = 1 9 of 21 countries: CHE, CZE, DNK, FRA,

HUN, GBR, ITA, JPN, USA

Relative Breeding Values Mean = 100, SD = 4, 7, 10, 12 8 countries in northern Europe

PTA, EBV, or other (4 countries) Convert USA minor breeds from PTA to

STA?