摘要
The aim of this study was to evaluate the effect of six generations of selection for intramuscular fat (IMF) in muscle Longissimus thoracis et lumborum (LTL) at 9 wk. in IMF and fatty acid (FA) composition of muscles with diverse metabolic profile in rabbits. Direct response to selection was 0.33 g of IMF/ 100 g of LTL, around 0.4 SD per generation. A positive correlated response was observed in IMF of Biceps femoris, Supraspinatus and Semimembranosus proprius muscles at 9 wk., representing around 0.2 SD of the trait per generation. Selection affected similarly the FA composition of all muscles at 9 wk., high-IMF line showing greater monounsaturated but lower polyunsaturated FA percentages than low-IMF line, whereas no differences were observed for saturated FA. Traits were also measured at 13 wk. and correlated responses were in the same direction. Our results suggest a common genetic background for IMF and FA composition in muscles with different metabolic profile in rabbits.
摘要译文
这项研究的目的是为了评估在9wk肌肉背最长肌（LTL）肌肉内脂肪（IMF）的六代选择效果。在国际货币基金组织和脂肪酸（FA）组成的肌肉具有不同的代谢剖面在兔子。对选择的直接反应是0.33克IMF / 100克LTL，每代约0.4 SD。国际货币基金组织的股二头肌，Supraspinatus和Semimembranosus proprius肌肉在9周时观察到正相关的反应，代表每代约0.2 SD的性状。选择同样影响9wk时所有肌肉的FA组成，高IMF线表现出比单独低IMF线更大的单不饱和但更低的多不饱和FA百分比，而饱和FA没有观察到差异。性状也在13周时测量。和相关的反应是在同一个方向。我们的研究结果表明IMF和FA成分在具有不同代谢特征的兔子肌肉中具有共同的遗传背景。
MarinaMartínez-álvaro;PilarHernández;SaifAgha[1];AgustínBlasco;. Correlated responses to selection for intramuscular fat in several muscles in rabbits[J]. Meat Science, 2018,139: 187-191