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. 2014 Jun 5;9(6):e98928. doi: 10.1371/journal.pone.0098928

Table 4. Regression coefficients of grand-dam traits on daughter milking performance.

Breed	PrenatalEnvironment indicatortrait	Lactation	Regression Coefficient
			Volume (litres)	Fat (kg)	Protein (kg)
Jersey	Grand-dam milk volume (litres)	1	−13.7±3.3^**	0.09±0.03^**	0.10±0.02^**
		2	6.3±0.9^**	0.14±0.04^**	0.15±0.03^**
	Grand-dam Fat %	1	−20.0±3.1^**	0.17±0.14^ns	−0.43±0.10^**
		2	−52.0±3.6^**	0.09±0.19^ns	−0.64±0.14^ns
	Grand-dam protein %	1	4.8±0.6^**	−0.03±0.14^ns	−0.16±0.11^ns
		2	−17.1±4.1^**	−0.19±0.18^ns	−0.27±0.14^ns
HolsteinFriesian	Grand-dam milk volume (litres)	1	2.52±0.36^**	−0.03±0.01^**	0.03±0.01^**
		2	3.66±0.49^**	−0.01±0.02^ns	0.06±0.02^**
	Grand-dam Fat %	1	−26.7±2.6^**	0.99±0.10^**	−0.25±0.79^ns
		2	−40.0±3.6^**	1.00±0.14^**	−0.50±0.11^**
	Grand-dam protein %	1	−10.2±2.9^**	0.51±0.12^**	0.14±0.09^ns
		2	−16.2±3.8^**	0.51±0.15^**	0.02±0.11^ns

Standard errors are given for each estimate.

**P<0.01;

ns = not significantly different from zero.