Inheritance of the duration of fertility in chickens and its correlation with laying performance

Table 1 Descriptive statistics of duration of fertility (DF) and laying performance

	Traits	N	Mean	SD	CV (%)	Min.	Max.
DF traits at 35 weeks	MD	2044	13.30	2.06	15.49	0	15
	ED	2044	7.92	5.10	64.35	0	15
	EN	2044	10.01	2.72	27.17	0	15
	FDD	2044	10.69	3.81	35.63	0	15
	TD	2044	12.10	3.48	28.75	0	15
DF traits at 60 weeks	MD	1619	12.50	2.43	19.42	0	15
	ED	1619	8.43	4.77	56.59	0	15
	EN	1619	7.15	2.34	32.77	0	14
	FDD	1619	10.81	3.46	32.03	0	15
	TD	1619	11.70	3.32	28.41	0	15
Laying performances	AFE	2094	158.15	6.83	4.32	136	195
Laying performances	HEP400	2041	181.88	27.26	14.99	37	235

It should be noted that eggs were collected from day 1 to day 15 following AI, and the estimates of the various DF traits may not represent the real statistics for these characteristics, especially for MD
MD maximum duration, ED efficient duration, EN number of viable embryos, FDD fertility duration day, TD number of days from the day after AI to the last viable embryo before two consecutive unhatched eggs, AFE age at first egg, HEP400 hatching egg production at 400 days of age, N number of non-missing values for each trait, CV coefficient of variation

ISSN: 1297-9686