TABLE 1.

Descriptive statistics of the data set used for the analysis

Traits analysed	N	Mean	SD	Minimum	Maximum	Range
Birthweight, kg	1475	21.3	3.07	12	33	21
Weaning weight, kg	1154	98.0	22.9	33	170	137
Pre weaning average daily weight gain, g	1154	320	94.9	50	608	558
Kleiber ratio	1154	10.1	1.38	3.63	13.4	9.76
Growth efficiency	900	35.1	1.05	1.08	7.46	6.38
Relative growth rate	900	1.94	0.09	1.69	2.01	0.32