Skip to main content

Table 5 The regression coefficient of classical inbreeding (F) when included in the multiple regression model alone, as well as the regression coefficients of classical and new inbreeding, and classical and ancestral inbreeding as defined by Ballou [12] when included in the model simultaneously, on calving interval (days), age at first calving (days) and survival to second lactation (0/1*100)1,2

From: Purging of inbreeding depression within the Irish Holstein-Friesian population

 

F

New3

Ballou4

  

New

F

Ballou

F

Calving Interval

0.54 (0.220)

4.76 (2.123)

-0.13 (0.372)

0.72 (0.220)

0.38 (0.225)

Age at first calving

0.48 (0.096)

2.09 (0.989)

0.20 (0.163)

0.33 (0.108)

0.43 (0.098)

Survival

-0.29 (0.092)

0.93 (0.885)

-0.42 (0.153)

-0.09 (0.093)

-0.27 (0.095)

  1. 1Regression coefficients in bold type are significantly (P < 0.05) different from zero
  2. 2 S.E. in brackets
  3. 3 Regression coefficients for new inbreeding and classical inbreeding when included simultaneously in the model
  4. 4Regression coefficients for ancestral inbreeding as defined by Ballou [12] and classical inbreeding when included simultaneously in the model.