Genetic evaluation of beef cattle in the Czech Republic

J. Přibyl1, J. Přibylová1, P. Šafus1, Z. Veselá1, L. Vostrý1, J. Kopecký2, K. Malát2, K. Šeba2

1Institute of Animal Science, 10400 Prague – Uhříněves, Czech Republic, www.vuzv.cz2Czech Beef Breeders Association, Prague, Czech Republic, www.cschms.cz

Beef cattle population in % (N = 353,678)

3.7 3.42 3.045.45

43.88

36.73

3.78

05

101520253035404550

CH BS AA Beef cross Beef xCzechspotted

(Fleckvieh)

Beef xdairy

Others

23,002 active population with performance recording

Commercial herds

155,000 cowsin a suckler system

Cows in the active population in % (1.5.2008)

57.94

14.01

26.36

1.690

10

20

30

40

50

60

70

Purebred 75-87% 50-74% Others

Calves born in the active population in % (control year 2006/7 )

17.1

8.2 6.53.8 2 1.8 1.1 0.4 0.1 0.7

23.6

3.3

31.2

0

5

10

15

20

25

30

35

CH BS AA LI HE BA PI GS GA HI BB SA OTH.

BREEDING:

- Only purebred beef sires

- Sire – state licence

- Natural service majority

- AI 12.8 %, for Charolais 21.9 %

- 815 bulls enter into breeding / year

- 752 for natural service

- 85% from domestic production

The most important paths of breeding:

- Selection of young bulls (young sires)

for herds

- Combination of parents for the

future generation of sires

DEVELOPMENT of the SYSTEM

- Performance recording

- Genetic evaluation (BV)

- Handling of databases

- Operative feedback

to the supervisors and farmers

Evaluated characteristics

Recorded traits Others

- health

- genetic defects

- defects conformation

- sexual dimorphism

- locomotion

- ………

Performance recording

Field test

Calving difficulty

365 days weight

Daily gain

Birth weight

120 days weight

Scoring body measurements and

capacity

Scoring musclingand overall type210 days weight

Performance

– test stations ♂

Type

Estimation of BV

Updated

4 times / year

Animals in genetic evaluationTrait Animals in

evaluation including pedigree

Animals with

production records

Yearly augmentation of database –

production records

Field test  

Weight at 120 days kg 331,219

106,512 8,011

Weight at 210 days kg 113,605 10,060

Weight at 365 days kg 44,585 3,498

Young ♂

Daily gain in test g/day 26,034 7,729 1,132

Type of young animals

10 traits points 44,404 17,612 5,379

Field test

Breeding values:

Multiple-Breeds, Multiple-Traits Animal Model with Maternal effect

(5 direct + 5 maternal traits)

yijklmnop = yri + hysij + sk+ aml

+ am + mn + pn + hdo + hmp +eijklmnop

yijklmnop - recorded performance (ce, birth, 120, 210, 365) yri - year hysij - group of jointly evaluated animals (herd-year-season) sk - sex of the animal aml - mother’s age at calving am - direct BV of the animal mn - maternal BV pn - maternal permanent environment hdo - direct heterosis of calves hmp - maternal heterosis of dams eijklmnop - residual

(am and mn with joint relationship and genetic groups according to the breeds)

Correlations between BV of sires in consecutive years

0,84 0,860,96 0,96 0,97

0,00

0,20

0,40

0,60

0,80

1,00

1-10 11-25 26-50 51-100 100<

Number of progeny

Own growth of bulls at performance-test stations

Breeding value:

Multiple-Breeds Single-Trait Animal Model

Daily gains of bulls from birth

to the end of the test (Bohmanová, 2001)

1251.9 1212.1

864.7

1524.2

800

1000

1200

1400

1600

0 - 120 120 - 210 210 - beginningof the test

test

Age days

g/da

y

yijklm = hysi + amj + chk + atl + gm + eijklm

yijklm - recorded daily gain in test

hysi - group of jointly evaluated animals (station-year-season)

amj - mother’s age at calving

chk - class of the herd from which the individuals came according to the average gain

atl - regression on the age of introduction into the test

gm - BV of the animal with genetic groups according to the breeds

eijklm - error

Type traits of young animals

HS - height at sacrum BL - body length LW - live weightCW - front chest widthCD - chest depth PE - pelvis (length and

width)

SM - shoulder musclingBM - back muscling RM - rump musclingPT - production type

Breeding values:

Multiple-Breeds, Multiple-Traits Animal Model (10 traits)

Traits two groups:

1) Body measurements and body capacity ( HS, BL, LW, CW, CD and PE)

2) Muscling and overall type (SM, BM, RM and PT).

First group: yijklmn = hysi + sj + amk + ael + gm + eijklmn

Second group: yijlmno = hysi + sj ael + bdgn + gm + eijlmno

yijklmn (yijlmno) - scoring of the trait hysi - group of jointly evaluated animals

(herd-year-season) sj - sex of the animal amk - mother’s age at calving ael - regression on age at evaluation bdgn - regression on daily gain from birth gm - BVof the animal

with genetic groups according to the breeds eijklmn (eijmnol) - error

Relative BV of sire -

muscling

SEUROPPoints

81 – 90 2.42

91 – 100 3.25

101 – 105 3.30

106 – 110 3.36

111 – 115 3.69

116 – 120 3.80

Slaughtered sonsaccording to BV of sires for

muscling

Selection indexes for young bulls

IM - terminal crossing

IZ - foundation sires

IS - common beef herd

The sources of information - BV:

- Field test -10 BV for direct and maternal effects

for easy calving and growth,

- Performance-testing stations - BV for

daily gain bulls

- Type traits of young animals -10 BV

Highest importance in the breeding objective

- Direct effects for daily gain until weaning

and after weaning

90% to 96%

of the total selection effect

The time trend of BVof Charolais bulls

96,00

98,00

100,00

102,00

104,00

106,00

2000 2001 2002 2003 2004 2005 2006 2007

Calving directCalving maternalGrowth directGrowth maternalMuscling

Future development

female fertility direct evaluation of carcass traits.

ORGANIZATION OF BEEF

www.CSCHMS.CZ

MINISTRY

ČSCHMS PrahaCzech Beef Breeders Association

(CBBA)

1990

CHAIRMAN

ČSCHMS Praha (CBBA)

election

BREEDERS

(voluntarily)

CHAIRMAN

EXECUTIVE MANAGER

(employee)

7 PROFESSIONALS + SECRETARY

(employees)

BREED CLUBS

CHAIR PERSONS

(elected)

coordination of breeds

ČSCHMS Praha(CBBA)

PLEMDAT ČMSCH a.s. (CMBC)

BREEDERS

state responsibility BV

calculation

central evidence

of animals

ČSCHMS Praha(CBBA)

PLEMDAT

RESEARCH

ČSCHMS Praha(CBBA)

ČMSCH a.s. (CMBC)

BREEDERS

state responsibility BV

calculation

central evidence

of animals

PLEMDAT

RESEARCH

ČSCHMS Praha(CBBA)

ČMSCH a.s. (CMBC)

BREEDERS

state responsibility BV

calculation

central evidence

of animals

INSEMINATION COMPANY

INSPECTORS HERD

BOOK

ADMINISTRATION

- PERFORMANCE RECORDING

- EVALUATION OF ANIMALS

- PROMOTION OF BEEF CATTLE

- SUBSIDIES …….

ČSCHMS Praha(CBBA)

INFORMATION FLOW

BREEDERS

- CONTACT WITH INSPECTORS

- PRINTED REPORTS

- PUBLICATIONS

ČSCHMS Praha(CBBA)

- ANNUAL

REPORTS

- ASSOCIATION MAGAZINE

4 x / year

WEBSITE – updated daily

www.CSCHMS.CZ

- Internet Tool for Breeders

- Breeding Programmes

- Interactive Database of Animals

- On – Line Performance Recording

- Breeding Bull Search Database

- BV

- News – vet.

– economic

– husbandry …………….

Thank for your attention

See you soon in the Czech Republic