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Table 3 Inbreeding depression estimates for growth and heifer pregnancy expressed as change in the phenotype per 1% increase in inbreeding and as a percentage of the trait mean (% of \(\stackrel{-}{x}\))

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

Trait

Group

\({\text{F}}_{\text{PED}}\)

\({\text{F}}_{\text{G}\text{R}\text{M}}\)

\({\text{F}}_{\text{R}\text{O}\text{H}}\)

Estimate

95% HPDI

% of \(\stackrel{-}{x}\)

Estimate

95% HPDI

% of \(\stackrel{-}{x}\)

Estimate

95% HPDI

% of \(\stackrel{-}{x}\)

HPa

 

− 0.001

(− 0.01, 0.01)

 

− 0.002

(− 0.01, 0.004)

 

− 0.002

(− 0.007, 0.004)

 

BiW (kg)

Males

− 0.03

(− 0.04, − 0.03)

− 0.09

− 0.04

(− 0.05, − 0.03)

− 0.11

− 0.04

(− 0.04, − 0.03)

− 0.10

Females

− 0.03

(− 0.04, − 0.02)

− 0.09

− 0.05

(− 0.05, − 0.04)

− 0.14

− 0.04

(− 0.05, − 0.03)

− 0.11

WW (kg)

Males

− 0.50

(− 0.55, − 0.44)

− 0.16

− 0.61

(− 0.66, − 0.57)

− 0.20

− 0.51

(− 0.55, − 0.48)

− 0.17

Females

− 0.47

(− 0.55, − 0.40)

− 0.17

− 0.59

(− 0.65, − 0.53)

− 0.21

− 0.49

(− 0.54, − 0.44)

− 0.18

PWG (kg)

Males

− 0.64

(− 0.71, − 0.57)

− 0.28

− 0.72

(− 0.77, − 0.67)

− 0.32

− 0.59

(− 0.63, − 0.54)

− 0.26

Females

− 0.34

(− 0.42, − 0.25)

− 0.30

− 0.42

(− 0.49, − 0.36)

− 0.37

− 0.35

(− 0.41, − 0.28)

− 0.31

  1. HP heifer pregnancy, 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
  2. aEstimates for heifer pregnancy are given in the liability scale