Status as of: 2020-04-05

Form GE

DESCRIPTION OF NATIONAL GENETIC EVALUATION SYSTEMS

Country (or countries)	Poland	
Main trait group1
NOTE! Only one trait group per form!	Udder health	
Breed(s)	Polish Holstein-Friesians	
Trait definition(s) and unit(s) of measurement2
Attach an appendix if needed	Somatic cell score (SCS) is defined as the trait and is calculated from somatic cell count (SCC) using:
       SCS = log2(SCC/100000) + 3	
Method of measuring and collecting data	Test day records between 5 and 305 days in milk. Known sire
required. Supervised milkings from A4, AT4, A8 systems.	
Time period for data inclusion	All test day records from 1995 	
Age groups (e.g. parities) included	First three lactations	
Other criteria (data edits) for inclusion of records		
Criteria for extension of records (if applicable)	N/A	
Sire categories	All bulls with progeny information including domestic and foreign AI bulls	
Environmental effects3, pre-adjustments 	No pre-adjustments for environmental effects	
Method (model) of genetic evaluation3	ST – ML – RR – TD – BLUP – AM	
Environmental effects3 in the genetic evaluation model	Fixed herd-test-date effects, fixed lactation curve effects nested within parity x breed x calving year x calving age x calving season classes, random permanent environmental effects for each of the first three lactations	
Adjustment for heterogeneous variance in evaluation model	A pre-adjustment of heterogeneous variances within herd-test-date effects	
Use of genetic groups and relationships	Based on sex, birth-year and HF percentage	
Blending of foreign/Interbull information in evaluation	No	
Genetic parameters in the evaluation	Use Appendix GE for heritability/genetic variance estimates; for multiple-trait genetic evaluations, provide genetic correlation estimates between traits separately.
Use also appendices PR, CO, BCO, SM, LO, CA, as applicable, if you participate in the international genetic evaluations of Interbull	
System validation	Interbull methods II and III 
	
Expression of genetic evaluations
If standardised (e.g. RBV), give standardisation formula in the appendix	Breeding Values are standardized to mean 100 and SD of 10.	
Definition of genetic reference base

Next base change	A cow genetic base includes all cows born in 20105. 

Bulls born between 2009 and 2011 with at least 20 daughters in at least 10 herds are used as base population for relative breeding values. 

Calculation of reliability	Using the multi-trait effective daughter contribution method 	
Criteria for official publication of evaluations	AI Bulls with minimum of 10 daughters.	
Number of evaluations / publications per year	3 ( April, August and December)	
Use in total merit index4	0.1 weight   in total merit index	
Anticipated changes in the near future		
Key reference on methodology applied	Jamrozik J., L. R. Schaeffer, and J.C.M. Dekkers. 1997. Genetic evaluation of dairy cattle using test day yields and random regression model. J Dairy Sci 80:1217–1226 
Liu, Z., F. Reinhardt, A. Bünger, and R. Reents 2004. Derivation and calculation of approximate reliabilities and daughter yield-deviations of a random regression test-day model for genetic evaluation of dairy cattle. J. Dairy Sci. 87:1896-1907.	
Key organisation: name, address, phone, fax, e-mail, web site	National Research Institute of Animal Production
ul. Krakowska 1, 32-083 Balice,
Tel. (+4812) 2588 133,  (+4812) 2588 136; Fax (+4812) 285 67 33 
e-mail: izooinfo@izoo.krakow.pl
www.izoo.krakow.pl	
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 SM

Parameters for national genetic evaluations for udder health traits as provided to Interbull

Country (or countries):	Poland	
Main trait group:	Health	
Breed(s):		

Trait	h2a	genetic
variancea	official proof
standardisation formulab	
Milk Somatic Cell:
	0.32	100	RBV = -1*((EBV-mean)/std)*10 + 100	
Clinical Mastitis:
				
a	If repeated records are treated as separate traits, provide heritability estimates and genetic variances separately for each trait, as well as for all traits pooled, i.e. for the trait submitted to Interbull.
b	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.