Status as of: 2016-09-30

Form GE	

DESCRIPTION OF NATIONAL GENETIC EVALUATION SYSTEMS

Country (or countries)	Czech Republic	
Main trait group1	Longevity	
Breed(s)	Holstein	
Trait definition(s) and unit(s) of measurement2	Functional herd life. (number of days between first calving and culling or first calving and actual date – censored data)	
Method of measuring and collecting data	milk recording data	
Time period for data inclusion	Cows with 1st calving since 1.1.1992.	
Age groups (e.g. parities) included	All parities.	
Other criteria (data edits) for inclusion of records	Age at 1st calving 500 - 1200 days.	
Criteria for extension of records (if applicable)	-	
Sire categories	All bull registered in herd book including domestic and foreign AI bulls without NS bulls.	
Environmental effects3, pre-adjustments 	None	
Method (model) of genetic evaluation3	ST S-MGS Survival Analysis model (Weibull)	
Environmental effects3 in the genetic evaluation model	age at 1st calving, lactation number, herd*year*season, milk yield within a herd, herd size	
Adjustment for heterogeneous variance in evaluation model	No	
Use of genetic groups and relationships	Yes	
Blending of foreign/Interbull information in evaluation	No	
Genetic parameters in the evaluation	see appendix	
System validation	Interbull trend validation method III.	
Expression of genetic evaluations
If standardised (e.g. RBV), give standardisation formula in the appendix	RBV (100;12)
(standardization formula in appendix)
(high values are desirable)	
Definition of genetic reference base
Next base change	Bulls born in 2005.	
Calculation of reliability	R=Nn/( Nn+(4-h2)/ h2)      Nn= number of culled daughters 	
Criteria for official publication of evaluations	minimum number of herds = 10	
Number of evaluations / publications per year	6	
Use in total merit index4	TMI = 0.49*Production + 0.12*Fertility + 0.07*UdderHealth + 
  + 0.07*Longevity + 0.25*Conformation
TMI = 0.225*ProteinKG + 0.115*FatKG + 0.11*Protein% + 
  + 0.04*Fat% + 0.12* FemaleFertility + 0.07*SomaticCells + 
  + 0.07*Longevity + 0.0625*Feet&Legs + 0.0375*FootAngle + 
  + 0.0125*RearLegRearView + 0.0125* Locomotion + 
  + 0.0375*UdderDepth + 0.025*ForeUdderAttachment + 
  + 0.025*UdderSupport + 0.0125*FrontTeatPlacement + 
  + 0.01875*RearUdderHeight + 0.00625*TeatLength
For this purpose all BV are standardized to mean 100 and standard deviation 12. TMI is standardized to mean 100 and st. dev. 12 too	
Anticipated changes in the near future		
Key reference on methodology applied	Vincent Ducrocq: Survival Analysis Applied to Animal Breeding and Epidemiology, 2007	
Key organisation: name, address, phone, fax, e-mail, web site	Czech Moravian Breeders’ Corporation
170 41 Prague 7, U topiren 2/860
workplace:
252 09 Hradistko, Hradistko 123
Ph. ++420 257 896 444
Fax. ++420 257 740 491
e-mail: cmsch@cmsch.cz
web-site: www.cmsch.cz
               www.plemdat.cz	
1) Either: Production (e.g. milk, fat, protein), Conformation, Health (e.g. mastitis resistance, milk somatic cell, resistance to diseases other than mastitis), Longevity, Calving (e.g. stillbirth, calving ease), Female fertility (e.g. non-return rate, interval between reproductive events, number of AI’s, heat strength), Workability (e.g. milking speed, temperament), Beef production, Efficiency (e.g. body weight, energy balance, body conditioning score), or Other traits.
2) Indicate frequencies per category if the trait is categorical and specify transformation of data if practiced.
3) Use abbreviations for most common effects (see document with list of abbreviations at http://www-interbull.slu.se/service_documentation/General/list_of_abbreviations.rtf) and indicate random (R) or fixed (F).
4) Please give economic weights and indicate how they are expressed (preferably in genetic standard deviation units).

 Form GE	Appendix LO

Parameters for national genetic evaluations for longevity traits as provided to Interbull

Country (or countries):	Czech Republic	
Main trait group:	Longevity	
Breed(s):	Holstein	

Trait	h2	genetic
variance	official proof
standardisation formulaa	
Direct longevity:
	0.223463	0.30792
(see note 1 under the table)	See under the table	
Combined longevity:
				
a	Expressed as follows:
StandEval=((eval-a)/b)*c+d where a=mean of the base adjustment, b=standard deviation of the base, c=standard deviation of expression (include sign if scale is reversed), and d=base of expression.

a = average of bulls born in 1995, b = standard deviation of bulls born in 1995, c = 12, d = 100

note 1:	estimated genetic variance = 0.30792
	converted genetic variance used in trend validation testing method 3 = 772.3724293
	- formula used for conversion