Genotype-by-environment interaction in Holstein heifer fertility traits using single-step genomic reaction norm models

Table 2 The critical periods selected for each fertility trait and environmental gradient (EG) scenario

EG^a	Trait^b	Scenario^c	Number of days	Period^d
Prop-EG	AFC	S1	60	(−30, 30)
	AFC	S2	60	(−90, −30)
	IFL	S1	60	(−30, 30)
	IFL	S2	60	(−90, −30)
	CR	S1	60	(−30, 30)
	CR	S2	70	(−10, 60)
mTHI-EG	AFC	S1	60	(−30, 30)
	AFC	S2	30	(−90, −60)
	IFL	S1	60	(−30, 30)
	IFL	S2	60	(−90, −30)
	CR	S1	60	(−30, 30)
	CR	S2	40	(−10, 30)

^a prop-EG The number of days that exceeded the threshold temperature humidity index in the period, mTHI-EG Minimum temperature-humidity index for each day of the period
^b AFC Age at first calving, IFL Interval from the first to last service, CR Conception rate of first service
^c S1 control critical period, S2 periods selected based on the Akaike’s information criterion
^d Periods were counted based on the first service day; minus means before and plus means after

ISSN: 1471-2164