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Table 2 Generation intervals (L), yearly rate of inbreeding (\(\Delta {\text{F}}_{\text{y}\text{e}\text{a}\text{r}}\)), and effective population size (\({N}_{e}\))

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

Group

L (years)

\(\Delta {\text{F}}_{{\text{P}\text{E}\text{D}}_{\text{y}\text{e}\text{a}\text{r}}}\)(%)

\({N}_{e\text{P}\text{E}\text{D}}\)

\(\Delta {\text{F}}_{{\text{G}\text{R}\text{M}}_{\text{y}\text{e}\text{a}\text{r}}}\)(%)

\({N}_{e\text{G}\text{R}\text{M}}\)

\(\Delta {\text{F}}_{{\text{R}\text{O}\text{H}}_{\text{y}\text{e}\text{a}\text{r}}}\)(%)

\({N}_{e\text{R}\text{O}\text{H}}\)

Sires PreGS

5.15

0.14 (0.01)

71 (60, 88)

0.12 (0.03)

81 (57, 137)

0.14 (0.03)

70 (49, 124)

Sires PostGS

4.88

0.05 (0.01)

183 (149, 235)

0.15 (0.01)

65 (58, 74)

0.09 (0.01)

110 (91, 138)

Dams PreGS

5.43

0.22 (0.02)

41 (37, 48)

0.21 (0.02)

43 (37, 51)

0.23 (0.02)

40 (35, 47)

Dams PostGS

4.55

0.03 (0.003)

315 (263, 391)

0.12 (0.004)

75 (70, 80)

0.07 (0.004)

140 (124, 162)

  1. Standard errors for \(\Delta {\text{F}}_{\text{y}\text{e}\text{a}\text{r}}\) and 95% CI for \({N}_{e}\) are presented
  2. PreGS pre genomic selection, PostGS post genomic selection, PED using pedigree, GRM using genomic relationship matrix, ROH using runs of homozygosity