On-site visible–near IR prediction of iodine number and fatty acid composition of subcutaneous fat of raw hams as phenotypes for a heavy pig breeding program

SummaryAberdeen Angus and Friesian cattle were reared from 4 months of age to slaughter weight at 18–24 months on either high-barley or high-hay diets. Samples of subcutaneous fat were taken by biopsy at 3 monthly intervals, and the degree of fatness of each animal was estimated ultrasonically prior to slaughter, and by visual inspection of the carcasses.The barley-fed animals gained weight more rapidly, and fattened more quickly than the hay-fed animals with the Angus being fatter than the Friesian at the same age. The percentage stearic acid (C18:0) in subcutaneous fat decreased with age and was replaced by octadecenoic acid (C18:l) and hexadecenoic acid (C16:l), these changes being more rapid in barley-fed than in hay-fed animals. At the same degree of fatness the depot fats of the Friesians were more unsaturated than those of the Angus, and in both breeds the fatter the animal the more unsaturated was its depot fat.In the hay-fed cattle the percentage C16:0 in subcutaneous fat increased during the last half of the experiment and at slaughter the percentage C16:0 was significantly higher, and C18:l significantly lower, in all depot fats compared with those of the barley-fed animals.It is concluded that the fatty acid composition of bovine depot fats is modulated by the degree of fattening, and can be affected by diet.

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Effect of stewing time on fatty acid composition, textural properties and microstructure of porcine subcutaneous fat from various anatomical locations

Journal of Food Composition and Analysis ◽

10.1016/j.jfca.2021.104240 ◽

2021 ◽

pp. 104240

Author(s):

Ying Xu ◽

Xiaofei Xie ◽

Wenwen Zhang ◽

Huimin Yan ◽

Yalin Peng ◽

...

Keyword(s):

Fatty Acid Composition ◽

Fatty Acid ◽

Acid Composition ◽

Subcutaneous Fat ◽

Textural Properties

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Genetic variation in fatty acid composition of subcutaneous fat in cattle

Animal Production Science ◽

10.1071/an12154 ◽

2013 ◽

Vol 53 (2) ◽

pp. 129 ◽

Cited By ~ 17

Author(s):

M. J. Kelly ◽

R. K. Tume ◽

S. Newman ◽

J. M. Thompson

Keyword(s):

Fatty Acids ◽

Genetic Variation ◽

Fatty Acid Composition ◽

Fatty Acid ◽

Acid Composition ◽

Saturated Fatty Acids ◽

Genetic Correlations ◽

Subcutaneous Fat ◽

Monounsaturated Fatty Acids ◽

Selection For

Genetic parameters were estimated for fatty acid composition of subcutaneous beef fat of 1573 animals which were the progeny of 157 sires across seven breeds grown out on pasture and then finished on either grain or grass in northern New South Wales or in central Queensland. There was genetic variation in individual fatty acids with estimates of heritability for the proportions of C14 : 0, C14 : 1c9, C16 : 0, C16 : 1c9, C18 : 0 and C18 : 1c9 fatty acids in subcutaneous beef fat of the order of 0.4 or above. Also substantial correlations between some fatty acids were observed. Genetic correlations between fatty acids and fat depth at the P8 site suggested that much of the genetic variation in fatty acid composition was related to changes in fatness. Selection for decreased fatness resulted in decreased proportions of C18 : 1c9 with concomitant increases in C18 : 0, C14 : 0 and C16 : 0. This suggested that selection for decreased fatness at a given weight will result in a decrease in the proportions of monounsaturated fatty acids in the subcutaneous fat in the carcass with a corresponding increase in the proportions of saturated fatty acids.

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Fatty acid composition of subcutaneous and intramuscular adipose tissue in east Balkan pigs

Biotechnology in Animal Husbandry ◽

10.2298/bah1504543p ◽

2015 ◽

Vol 31 (4) ◽

pp. 543-550 ◽

Cited By ~ 2

Author(s):

T. Popova ◽

J. Nakev ◽

Y. Marchev

Keyword(s):

Fatty Acids ◽

Adipose Tissue ◽

Fatty Acid Composition ◽

Fatty Acid ◽

Polyunsaturated Fatty Acids ◽

Acid Composition ◽

Subcutaneous Fat ◽

Intramuscular Fat ◽

Longissimus Dorsi ◽

Intramuscular Adipose Tissue

The aim of this study was to provide information on the fatty acid profile of different adipose depots - subcutaneous (upper and inner backfat layers) and intramuscular (m. Longissimus dorsi) in East Balkan pigs. The animals were reared in free-range conditions and slaughtered at an average live weight of 107?1.65kg. The results of the study showed that the various adipose tissues in pigs have different lipid metabolism and hence differ in their fatty acid composition. Intramuscular fat had significantly higher content of the saturated C16:0 and C18:0 (P<0.001), as well as the C16:1 (P<0.001) than the subcutaneous fat. In regards to the content of the polyunsaturated fatty acids, the latter displayed considerably higher content of both C18:2 and C18:3 (P<0.001) in comparison to the intramuscular fat in m. Longissimus dorsi. The differences between the subcutaneous and intramuscular adipose tissue in the individual fatty acids determined the similar trend of change in the total content of saturated and polyunsaturated fatty acids. Significant differences between the backfat layers were detected for C16:1, C18:0 and C18:3 (P<0.001). Stearic acid (C18:0) displayed higher content of the inner, while both C16:1 and C18:3 had higher proportion in the outer backfat layer in the East Balkan pigs. Except for C20:2, the long chain polyunsaturated n-6 and n-3 fatty acids had significantly higher proportions in the intramuscular fat, however no differences were determined between the two backfat layers.

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