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Table 1 Number of animals by birth year within each population 1 for cows and bulls

From: Characterizing homozygosity across United States, New Zealand and Australian Jersey cow and bull populations

 

Cows 2

Bulls 2

 

AU

US

AU

NZ

US

1990-1994

2

106

85

174

325

1995-1997

18

61

101

213

271

1998-2000

202

26

132

327

326

2001-2003

871

137

155

403

324

2004-2006

2009

1121

151

365

412

2007-2009

886

3076

90

74

420

≥ 2010

3

3672

175

0

53

  1. 1AU = Australia; US = United States; NZ = New Zealand.
  2. 2Principle component analyses and characterizing the autozygosity between and within populations used animal born within years 2007 to 2009 and 2001 to 2006 for the cows and bulls, respectively. Change in autozygosity across time used cows born after 2002 for the US population and AU cows born from 1990 and 2010. Change in autozygosity across time used bulls born between 1999 to 2008 for AU, NZ, and US.