Impact of two myostatin (MSTN) mutations on weight gain and lamb carcass classification in Norwegian White Sheep (Ovis aries)

Table 3 Solutions ± standard errors for various traits and genotype classes, resulting from mutations at c.960 or c.2360

c.960	GG
c.2360	GG	AG	AA
Weight gain/d from birth to weaning (g)	357 ± 12	352 ± 11	350 ± 12
Weaning weight (kg)	50.1 ± 1.7	49.4 ± 1.6	49.0 ± 1.8
Carcass weight gain/d from birth to slaughter (g)	136 ± 5	134 ± 5	137 ± 5
Carcass weight (kg)	21.4 ± 0.6	21.3 ± 0.6	21.8 ± 0.7
Carcass conformation class (scale 1-15)	7.4 ± 0.3	7.7 ± 0.3	8.1^0.015 ± 0.4
Carcass fat class (scale 1-15)	6.0 ± 0.3	5.4^0.001 ± 0.2	5.1^0.000 ± 0.3
c.960	G(delG)		(delG)(delG)
c.2360	GG	AG	GG
Weight gain/d from birth to weaning (g)	361 ± 12	349 ± 12
Weaning weight (kg)	50.2 ± 1.7	48.9 ± 1.8
Carcass weight gain/d from birth to slaughter (g)	143 ± 5	140 ± 5	142 ± 8
Carcass weight (kg)	22.1 ± 0.6	22.3 ± 0.7
Carcass conformation class (scale 1-15)	8.3^0.000 ± 0.3
Carcass fat class (scale 1-15)	5.0^0.000 ± 0.3

Guanine (G) is found at both mutated positions in wild types, while (delG) and adenine (A) respectively, are found when mutations are present. The P-value of genotype classes contrasted with the wild type (GG_GG) is presented as superscript, while the P-value for G(delG)_GG, G(delG)_AG and (delG)(delG)_GG contrasted with GG_AA is given in subscript. The P-values are given only for significant findings (P < 0.05). Solutions are given with the following restrictions; genotype of dam class GG_GG, male, twin and age of dam = 3.