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Table 1 Body traits of parental, F 1 and G 3 animals (means and standard deviations)

From: Effect of the myostatin locus on muscle mass and intramuscular fat content in a cross between mouse lines selected for hypermuscularity

 

P

F1

G3

 

BMMI866

BMMI806

   

Trait

Males

Females

Males

Females

Males

Females

Males

Females

Body weight (g)

49.31 (2.36)***

40.35 (2.47)***

36.43 (4.69)

26.77 (2.16)

42.17 (3.44)aaa,bb

34.38 (2.12)aaa,bbb

44.98 (4.21)aaa,bbb

36.69 (4.63)aaa,bbb

Lean mass (g)

41.89 (2.43)***

33.79 (2.12)***

29.31 (2.29)

23.87 (1.99)

32.30 (2.72)aaa,bbb

29.04 (2.03)aaa,bbb

36.12 (4.03)aaa,bbb

30.61 (4.42)aaa,bbb

ML-Mass (g)

1.33 (0.13)***

1.08 (0.1)***

0.67 (0.08)

0.54 (0.05)

0.89 (0.09)aaa,bbb

0.75 (0.08)aaa,bbb

0.95 (0.22)aaa,bbb

0.85 (0.23)aaa,bbb

MQ-Mass (g)

0.84 (0.05)***

0.67 (0.05)***

0.44 (0.04)

0.34 (0.03)

0.55 (0.05)aaa,bbb

0.47 (0.03)aaa,bbb

0.61 (0.15)aaa,bbb

0.55 (0.15)aaa,bbb

Fat mass (g)

3.53 (1.67)

3.50 (1.35)

4.41 (1.46)

3.13 (1.19)

4.41 (0.98)a

3.76 (0.94)

5.00 (1.96)aa

2.88 (1.39)a

Fat mass (%)

7.77 (3.65)***

9.36 (3.49)

12.90 (3.52)

11.41 (3.47)

11.98 (2.35)aaa

11.40 (2.31)a

12.16 (4.50) aaa

8.70 (4.31)b

IMF-ML (%)

1.17 (0.23)***

1.28 (0.23)***

2.64 (0.34)

2.45 (0.49)

1.89 (0.32)aaa,bbb

1.50 (0.2)a,bbb

1.69 (0.39)aaa,bbb

1.38 (0.33)bbb

IMF-MQ (%)

1.07 (0.15)***

1.11 (0.12)***

1.81 (0.30)

1.80 (0.29)

1.46 (0.15)aaa,bbb

1.38 (0.16)aaa,bbb

1.34 (0.21)aaa,bbb

1.22 (0.18)aa,bbb

WHC-ML (%)

1.00 (0.58)

1.03 (0.39)

1.09 (0.37)

1.01 (0.39)

0.90 (0.25)b

1.08 (0.35)

1.24 (0.64)aa

1.23 (0.41)a

WHC-MQ (%)

0.75 (0.21)

0.69 (0.17)

0.85 (0.33)

0.81 (0.26)

0.86 (0.17)a

0.95 (0.33)aa

0.93 (0.29)aa

0.93 (0.23)aaa,b

Glucose (mg/dL)

105 (24)*

88 (17)**

120 (26)

104 (17)

108 (14)

87 (12)bbb

106 (13)bb

90 (12)bbb

Glycogen (mg/g)

1.94 (0.75)

2.24 (1.51)

2.47 (0.76)

2.45 (1.38)

1.52 (0.52)b

1.73 (0.54)

1.37 (0.90)bb

1.18 (0.76)b

Lactate (mg/g)

0.068 (0.008)

0.091 (0.014)

0.064 (0.003)

0.070 (0.025)

0.035 (0.010)aa,bb

0.035 (0.012)a,b

0.048 (0.017)aa,bb

0.045 (0.013)aa,bb

pH 1 hour

6.67 (0.11)*

6.63 (0.08)

6.74 (0.09)

6.71 (0.12)

-

-

6.77 (0.15)aaa

6.73 (0.15)aa

pH 24 hours

6.16 (0.10)

6.15 (0.12)*

6.12 (0.12)

6.25 (0.12)

-

-

6.12 (0.11)

6.13 (0.09)bbb

  1. Trait abbreviations: IMF = intramuscular fat content, WHC = water holding capacity (measured as ‘drip loss’ in percent of muscle weight), ML = Musculus longissimus, MQ = Musculus quadriceps, Glucose = blood glucose level. Phenotypes of the parental lines are compared with each other and the F1 and G3, separated for sex. Asterisks indicate significant differences between the parental lines; letters indicate significant differences between the F1 or G3 and BMMI866 (a) or BMMI806 (b) lines. Number of asterisks and letters show levels of significance (***/aaa/bbbp < 0.001, **/aa/bbp < 0.01, */a/bp < 0.05).