Trends in genome-wide and region-specific genetic diversity in the Dutch-Flemish Holstein–Friesian breeding program from 1986 to 2015

Table 5 Relative emphasis of trait categories in the Dutch-Flemish bull selection index over time

Year	Index	Relative emphasis of trait category (%)					References
Year	Index	INET	CONF	LONG	REPR	UH	References
1980	INET	100	–	–	–	–	[42]
1989	Stiersom	67	33	–	–	–	[42, 43]
1999	DPS	67	–	33	–	–	[44]
2003	DPS	58	–	26	12	4	[23]
2007	NVI	40	27	8	16	9	[45]
2012	NVI	26	30	11	19	14	[46]

Note that the relative emphasis of trait categories may not be calculated consistently across references
INET production index combining milk, fat and protein yield, CONF conformation traits, i.e. conformation of udder, legs, muscling and/or general stature, LONG longevity or durability, REPR reproductive traits including fertility and birth traits, UH udder health or somatic cell count

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