Trends in genetic diversity and the effect of inbreeding in American Angus cattle under genomic selection

Table 4 Projected phenotypic depression on growth of animals with low (5th percentile) and high (95th percentile) pedigree and genomic inbreeding

Trait	Group	\({\text{F}}_{\text{PED}}\)			\({\text{F}}_{\text{G}\text{R}\text{M}}\)			\({\text{F}}_{\text{R}\text{O}\text{H}}\)
Trait	Group	Low	High	Difference	Low	High	Difference	Low	High	Difference
BiW (kg)	Males	− 0.12	− 0.33	0.21	− 0.15	− 0.40	0.25	− 0.13	− 0.34	0.22
BiW (kg)	Females	− 0.11	− 0.31	0.20	− 0.17	− 0.47	0.31	− 0.14	− 0.39	0.25
WW (kg)	Males	− 1.75	− 4.78	3.03	− 2.15	− 5.88	3.73	− 1.81	− 4.94	3.13
WW (kg)	Females	− 1.66	− 4.74	3.08	− 2.07	− 5.90	3.83	− 1.74	− 4.96	3.22
PWG (kg)	Males	− 2.28	− 6.10	3.82	− 2.56	− 6.86	4.30	− 2.10	− 5.62	3.52
PWG (kg)	Females	− 1.20	− 3.36	2.16	− 1.51	− 4.22	2.71	− 1.23	− 3.45	2.22

BiW birth weight, WW weaning weight, PWG post-weaning gain, \({F}_{PED}\) total pedigree inbreeding, \({F}_{GRM}\) genomic relationship matrix derived inbreeding, \({F}_{ROH}\) inbreeding based on runs of homozygosity
5th and 95th percentile inbreeding was calculated for each trait in males and females separately

ISSN: 1297-9686