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Table 1 Birth year distribution of genotyped bulls (n = 3570)

From: Accuracies of genomic breeding values in American Angus beef cattle using K-means clustering for cross-validation

Birth year

Number of bulls (n)

1955 to 1959

8

1960 to 1964

10

1965 to 1969

26

1970 to 1974

53

1975 to 1979

57

1980 to 1984

114

1985 to 1989

212

1990 to 1994

446

1995 to 1999

699

2000 to 2004

705

2005 to 2008

1240

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Genetics Selection Evolution

ISSN: 1297-9686