Table 2 Least squares means effect of robust and sensitive groups, production environments sire family and sex on feeding behaviour and performance traits.

No. of pigs

179

194

216

179

Feeding behaviour traits

ADFI³, g/d

2,207^a

2,321^a

1,886^b

1,729^c

410

SF*, E***, S***, Pe***, GxE***

Daily eating time, min

78.2^a

75.2^a

70.0^b

61.8^c

15.7

SF***, E***, S***, Pe***, G***, GxE*

Number of meals

6.2^a

6.3^a

7.4^b

7.7^b

1.7

SF***, E***, S**, Pe***

Feeding rate, g/min

31.6^a

34.8^b

29.0^c

29.5^c

7.4

SF*, E***, Pe***, G**, GxE*

Meal size, g

375^a

392^a

273^b

232^c

91

SF***, E***, S^†, Pe***, G^†, GxE***

Meal duration, min

13.2^a

12.5^a

10.1^b

8.2^c

3.0

SF***, E***, Pe*, G***, GxE**

Performance traits

Final BW⁴, g

101.3^a

102.8^a

87.8^b

81.6^c

9.0

SF***, E***, S***, G***, GxE***

ADG⁵, g/d

811^a

817^a

772^b

715^c

82

SF***, E***, S***, G***, GxE***

BFT^5, mm

19.5^a

21.5^b

16.0^c

15.2^d

2.7

SF***, E***, S***, Pe**, G**, GxE***

FCR⁷ kg feed,/kg BW gain

2.7^a

2.8^a

2.5^b

2.4^b

0.5

SF^†, E***, S*, Pe***, GxE*

RFI⁸, g/d

64.6^a

77.4^a

6.2^a

-23.2^b

370

E**, Pe***