期刊
MEAT SCIENCE
卷 188, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.meatsci.2022.108775
关键词
Genetic correlations; Swine; Heritability; Meat quality
资金
- PRIN 2015 national project [201549TZXB001]
- AGER - Hepiget project [2011-0279]
Most fatty acids in Semimembranosus muscle and backfat have a common genetic basis, but there are also tissue-specific genetic controls for certain fatty acids. The variations in fatty acid composition between the two tissues have low-to-medium heritability values, suggesting the presence of genetic mechanisms that differentiate fatty acid deposition between the two.
This study was conceived to evaluate the variations between backfat (BF) and Semimembranosus (SM) muscle fatty acid (FA) composition in 789 heavy pigs and to estimate the genetic and phenotypic correlations and the heritability values of these variations. Most FAs showed a common genetic basis controlling their proportion in SM muscle and BF, while the n-6/n-3 ratio, alpha-linolenic and erucic acids displayed a genetic control more oriented towards tissue-specific molecular pathways. All variations between the FA composition of BF and SM muscle showed low-to-medium heritability values, suggesting that there are also genetic mechanisms capable of differentiating the deposition of FAs in BF from those in SM muscle. This result implies that a better knowledge of the genes differentiating the FA composition of BF and SM muscle could provide new tools allowing to select, in a partially independent manner, the FA composition of muscle and subcutaneous fat.
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