Search results

Sort By:

Limit search:

Association of 3 polymorphisms in porcine troponin I genes (TNNI1 and TNNI2) with meat quality traits

100%

Yang H., Xu Z. Y., Lei M. G., Li F. E., Deng C. Y., Xiong Y. Z., Zuo B.

The contractile protein troponin I (TnI), a constituent protein of the troponin complex located on the thin filaments of striated muscle, is involved in inhibition of calcium-induced myosin ATPase activity (and thus contraction). TnI-slow (slow-twitch skeletal muscle isoform, named TNNI1) and TnI-fast (fast-twitch skeletal muscle isoform, named TNNI2) are muscle-fiber-type-specific proteins, and expression of their genes may affect the composition of muscle fiber, thereby influencing the meat quality traits. Thus, the TnI genes are potential candidate genes for traits related to meat quality in animals. Association of 2 SNPs (EU743939:g.5174T>C in intron 4, and EU743939:g.8350C>A in intron 7) of the TNNI1 gene and a SNP (EU696779:g.1167C>T in intron 3) of the TNNI2 gene with 11 meat quality traits were studied on 334 Large White x Meishan F2 pigs. In the TNNI1 gene, g.5174T>C and g.8350C>A were found to be significantly associated with intramuscular fat content and meat color value of biceps femoris. The g.5174T>C also showed significant effects on meat color value and marbling score of longissimus dorsi, as well as pH of longissimus dorsi and semispinalis capitis. The g.1167C>T polymorphism in the TNNI2 gene affected significantly the pH of longissimus dorsi, meat color value of longissimus dorsi and semispinalis capitis, marbling score of longissimus dorsi, and intramuscular fat.

Quantitative trait loci for carcass traits on pig chromosomes 4, 6, 7, 8 and 13

84%

Zhang J. H., Xiong Y. Z., Zuo B., Lei M. G., Jiang S. W., Li F. E., Zheng R., Li J. L., De_ X. Q.

Journal of Applied Genetics

2007

vol. 48

issue 4

363-369

For 22 carcass traits, we identified 16 QTLs (based on data for pig resource population no. 214, including 180 F2 hybrids of 3 Yorkshire boars and 8 Meishan sows) and mapped them with the use of 39 microsatellite marker loci on chromosomes 4, 6, 7, 8 and 13. Five QTLs were highly significant (P 0.01 at chromosome level): for skin weight (on chromosome 7 at SW1856 and on chromosome 13 at SW1495), skin percentage (on chromosome 7 between SW2155 and SW1856 and on chromosome 13 between SW1495 and SW520), and ratio of leg and butt to carcass (on chromosome 4 at SW1996). The remaining 11 QTLs were significant (P 0.05 at chromosome level): for backfat thickness at shoulder, loin eye width, loin eye height, fat meat weight, lean meat weight, skin weight, bone weight, skin percentage, fat meat percentage, and ratio of lean meat to fat meat. The proportion of phenotypic variance explained by these QTLs ranged from 0.06% (QTL for loin eye width on chromosome 8 between SW1037 and SW1953) to 18.04% (QTL for ratio of lean meat to fat meat on chromosome 7 between SW252 and SW581). Seven of the QTLs reported here are novel.

Refine search results

2 Journal of Applied Genetics

1 2010

1 2007

2 Lei M. G.

2 Li F. E.

2 Xiong Y. Z.

2 Zuo B.

1 De_ X. Q.

1 Deng C. Y.

1 Jiang S. W.

1 Li J. L.

1 Xu Z. Y.

1 Yang H.

1 Zhang J. H.

1 Zheng R.

Search results

Association of 3 polymorphisms in porcine troponin I genes (TNNI1 and TNNI2) with meat quality traits

Quantitative trait loci for carcass traits on pig chromosomes 4, 6, 7, 8 and 13