Genetic Parameters of Semen Traits and Their Correlations with Conformation Traits in Chinese Holstein Bulls

Table 1

Quality control procedures of semen traits and conformation traits.

Step	Content	Criterion	Sample size
			Semen trait	Conformation trait
1	Semen and conformation traits	Raw data	66,260	3,642
2	SVPE	≥2 mL	65,600	3,642
3	SCPE	≥2 × 10^8/mL	65,412	3,642
4	SMPE	≥0.4	64,087	3,642
5	Semen traits	Removal of unmeasured data	64,072	3,642
6	Conformation traits	Removal of data before 2014	64,072	2,881
7	Semen and conformation traits	Removal of data without birth date	56,980	2,774
8	Conformation traits	Removal of data without completion of three-generation pedigree	56,980	2,635

SVPE = semen volume per ejaculation; SCPE = semen concentration per ejaculation; SMPE = sperm motility per ejaculation.