The content of polyunsaturated fatty acids in intramuscular fat of beef cattle in different breeds and crossbreeds

Abstract

Abstract. The effect of crossbreeding on the content of polyunsaturated fatty acids (PUFA) in intramuscular adipose tissue of the Musculus longissimus pars thoracis of slaughter bulls was studied. The differences among 8 genotypes of bulls was most significant (p<0.01) in C18:3, C20:4, C22:4, C22:5 and C22:6. The content of linolenic acid (C18:3) in the Czech Spotted Cattle (control group) was 0.526%, the highest in the Czech Spotted x Piedmont cattle crosses (0.659 %), and the lowest in crosses with the Belgian breed (0.186 %). We evaluated the content of C18:3 (n-6 and n-3) and among the genotypes the differences in the content were insignificant. Compared with the control group all the evaluated genotypes showed a higher representation of C18 n-3, which does not apply to the isomer C18 n-6. At low percent values we detected insignificant differences in changes in content of isomers C22:5. Factors such as the age of the animals and the carcass weight had no effect on the structure of fatty acids. More important was the content of the intramuscularly adipose tissues. With increasing content of intramuscularly adipose tissue the values of C18:3 (n-3 and n-6) and C22:5 (n-3 and n-6) decreased as did the content of other acids belonging to PUFA (p<0.01).

Breed variation in the chemical and fatty acid compositions of the Longissimus dorsi muscle in Czech Fleckvieh and Montbeliarde cattle

“…However, recently published studies evaluating meat production showed a higher growth rate of M bulls (Chládek et al, 2005) and none or minimum differences in carcass composition (Šubrt and Mikšík, 2002). Few works have dealt with the comparison of the fatty acid (FA) profile of dual-purpose breeds of Simmental origin (Reichardt et al, 1997;Kirchheim et al, 1998;Hollo et al, 2001;Petrič et al, 2005;Šubrt et al, 2006), which are "the pillar" of milk-producing cattle population in Central Europe. According to several authors, selective breeding could be applied to improve the fatty acid profile of intramuscular fat (Malau-Aduli et al, 1998;Laborde et al, 2001).…”

Milk fatty acid composition and conjugated linoleic acid content of Jersey and Fleckvieh x Jersey cows in a pasture-based feeding system

“…Subrt et al (2006) reported that higher levels of total MUFAs could be associated with the ability of the breeds and cattle genotypes to deposit intramuscularly adipose tissue. Samkova et al (2012) similarly found an increasing trend for various breeds, that is, Holstein, Jersey, Brown Swiss, Ayrshire and Montbéliarde, with higher FA from early to the end of the lactation period.…”

Slaughter and carcass characteristics, chemical composition and physical properties of <i>longissimus lumborum</i> muscle of heifers as related to marbling class

“…In turn, IMF is the chemically estimated fat content of meat; the terms marbling and IMF are commonly used alternatively. This characteristic presents considerable variability both between (Chambaz et al, 2001;Šurbt et al, 2006) and within breed populations (Węglarz, 2010a) and among muscle types depending on their anatomy and the physiological role played (Rhee et al, 2004, Searls et al, 2005.…”