Persistence of accuracy of genomic estimated breeding values over generations in layer chickens

Table 1 Numbers of individuals with phenotypic and marker genotype data available for training and validation per generation

	Training data*
Generation	Cumulated number genotyped	Cumulated number genotyped with own record	Cumulated number of progeny with genotyped parents Early/Late	Number genotyped and with own record in validation data
0	365	0	0	-
1	777	295	2,443/342	322
2	1,215	618	4,892/804	295
3	1,628	913	7,562/1,287	357
4	2,108	1,273	9,319/1,686	274
5	2,708	1,563	11,486/2,455	262

*Training data included only phenotypes prior to a given generation; validation data consisted of hens from that generation with genotypes and own phenotypes; these hens contributed to training data in subsequent generations; the intention was to measure all traits for the genotyped birds, therefore they had very few missing values, at most 23 missing phenotypes for a give trait for 1,563 genotyped hens.

ISSN: 1297-9686