Genetics Selection Evolution

Table 2 Descriptive statistics for steers weaned in 2019 or 2020

From: Estimating the heritability of nitrogen and carbon isotopes in the tail hair of beef cattle

Item	Year	Breed
		Brahman				Droughtmaster
		Mean	Min	Max	SD	Mean	Min	Max	SD
Number of animals	2019	131				119
δ¹⁵N (‰)		9.65	6.27	11.62	0.78	9.62	6.84	11.01	0.67
δ¹³C (‰)		− 12.51	− 16.82	− 10.52	1.15	− 12.29	− 17.1	− 10.6	0.99
ADG-P1^a		0.46	0.32	0.59	0.05	0.49	0.31	0.66	0.58
ADG-P2^a		0.65	0.30	0.86	0.11	0.66	0.32	1.05	0.12
ADG-P3^a		0.71	0.50	0.96	0.79	0.72	0.52	0.93	0.07
Overall ADG^a		0.56	0.45	0.69	0.04	0.58	0.47	0.68	0.04
Number of animals	2020	137				105
δ¹⁵N (‰)		11.64	10.09	12.7	0.49	11.2	9.87	12.85	0.66
δ¹³C (‰)		− 15.97	− 18.62	− 13.06	1.00	− 15.53	− 17.9	− 12.81	1.17
ADG-P1^b		0.81	0.53	1.12	0.11	0.83	0.54	1.23	0.14
ADG-P2^b		0.39	0.20	0.64	0.07	0.42	0.22	0.59	0.08
ADG-P3^b		0.62	0.44	0.78	0.07	0.61	0.43	0.85	0.07
Overall ADG^b		0.61	0.50	0.76	0.05	0.61	0.51	0.79	0.05

δ¹⁵N, ratio of ¹⁵N:¹⁴N. δ¹³C, ratio of ¹³C:¹²C. ADG-P1^a, (birth to Apr 2020, kg/d). ADG-P2^a, (Apr to Sep 2020, kg/d). ADG-P3^a, (Sep 2020 to May 2021, kg/d). Overall ADG^a, (birth to May 2021, kg/d). ADG-P1^b, (birth to May 2020, kg/d). ADG-P2^b, (May to Nov 2020, kg/d). ADG-P3^b, (Nov 2020 to July 2021, kg/d). Overall ADG^b, (birth to July 2021, kg/d)

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