Accounting for genomic pre-selection in national BLUP evaluations in dairy cattle

Table 2 Number and type of performances available in BLUP evaluations for the four tested scenarios

Proportion of sires retained after genomic selection		25%		10%
Performances		Actual daughter records	Genomic pseudo-performances	Actual daughter records	Genomic pseudo- performances
UD^d trait	After progeny testing	40222	0	40222	0
	After genomic pre-selection: GPS_no^a	40222	0	40222	0
	GPS_sel^b	40222	799	40222	799
	GPS_all^c	40222	3196	40222	7990
FA^e trait	After progeny testing	31976	0	31976	0
	After genomic pre-selection: GPS_no^a	31976	0	31976	0
	GPS_sel^b	31976	601	31976	601
	GPS_all^c	31976	2404	31976	6010

^agenomic pre-selection of young sires but no inclusion of genomic pseudo-performances; ^bgenomic pre-selection of young sires and genomic pseudo-performances were included for selected young sires; ^cgenomic pre-selection of young sires and genomic pseudo-performances were included for all candidate sires; ^dudder depth; ^efoot angle

ISSN: 1297-9686