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Table 2 Parameters and values applied to filter the semen quality data of Swiss BSW bulls

From: Autosomal recessive loci contribute significantly to quantitative variation of male fertility in a dairy cattle population

Filtering parameter

Number of bulls

Number of ejaculates

Raw data

1432

74,945

Age at ejaculate collection > 400 and < 1000 days

1380

60,246

Interval to preceding ejaculate known (without first ejaculate)

1379

59,353

Ejaculate volume recorded

1366

58,846

No mixed ejaculates

1358

42,870

Only processed ejaculates

1311

38,370

Interval between ejaculates <= 8 days

1304

38,023

Only first ejaculate per day

1301

34,665

Sperm motility > = 70%

1285

34,510

Anomaly score plausible

1285

34,505

Sperm per straw > = 15 million (not sorted for sex)

1285

34,278

Semen collector and bull handler known

1253

32,023

(imputed) HD genotype available

1119

29,814

> = 8 records per bull

902

28,856