Phenotypic and genetic parameters for longissimus muscle fiber characteristics in relation to growth, carcass, and meat quality traits in large white pigs.

Larzul, Catherine; Lefaucheur, Louis; Ecolan, Patrick; Gogué, Jean-Marcel; Talmant, André; Sellier, Pierre; Roy, Pascale Le; Monin, Gabriel

doi:10.2527/1997.75123126x

Cited by 297 publications

(274 citation statements)

References 44 publications

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“…Average BF, FAT and PFAT of castrates were significantly higher than those of gilts (29.01 vs. 25.56 mm, 9.57 vs. 7.55 kg and 21.79 vs. 17.43%, respectively). The results are in agreement with previous reports on sex differences (Larzul et al, 1997;Tischendorf et al, 2002;Cassady et al, 2004). However, Mohrmann et al (2006) did not find any significant differences between the sexes (gilts and barrows), but gilts tended to have higher lean meat content.…”

Section: Resultssupporting

confidence: 83%

The effect of sex and slaughter weight on intramuscular fat content and its relationship to carcass traits of pigs

Bahelka¹,

Hanusová²,

Peškovičová³

et al. 2007

CZECH J ANIM SCI

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Carcass quality and intramuscular fat content of castrates and gilts are compared and a possible dependence of intramuscular fat content on sex and slaughter weight is determined in the pig population of the Slovak Republic. A total of 129 pigs of three different genotypes were included in the experiment. After slaughter, the carcasses were weighed and backfat thickness was measured. On the next day, carcass dissection described by Walstra and Merkus (1995) was determined. Four prime cuts (shoulder, loin, ham and belly) were further dissected to meat, bones and fat with skin. Intramuscular fat content was analysed in a laboratory from the samples (100 g) of musculus longissimus dorsi. The results were statistically analysed using SAS/STAT and a linear model was used to find the dependence of intramuscular fat content. Correlation coefficients between carcass traits and intramuscular fat were also calculated. Sex of pigs, and particularly weight of lean meat and weight of fatty parts had a significant effect on intramuscular fat content (P < 0.0001 and P = 0.0022) while no effect of the genotype and slaughter weight was observed. Significant differences between castrates and gilts were found in almost all observed traits, e.g. average backfat thickness (29.01 vs. 25.56 mm), percentage of meat (52.77 vs. 57.68%), intramuscular fat content (2.49 vs. 2.00%). Generally, the intramuscular fat in the pig population is not sufficient (2.25%), therefore it would be desirable to include this trait in selection strategies in pig breeding.

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Section: Resultssupporting

confidence: 83%

The effect of sex and slaughter weight on intramuscular fat content and its relationship to carcass traits of pigs

Bahelka¹,

Hanusová²,

Peškovičová³

et al. 2007

CZECH J ANIM SCI

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“…Contrary to most studies, they found that females had higher IMF content than castrates. In our study, castrates had higher IMF content than females; this was supported by Larzul et al (1997) and Bahelka et al (2007), who found significantly higher lean meat percentage and lower levels of IMF in females than in castrates. Latorre et al (2003) found significantly higher IMF content, and less moisture and protein in castrates than in females.…”

Section: Genetic Variation In Meat Qualitysupporting

confidence: 86%

Genetic parameters of meat quality traits in two pig breeds measured by rapid methods

Gjerlaug-Enger

Aass

Ødegård

et al. 2010

Animal

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To study genetic variation in meat quality traits measured by rapid methods, data were recorded between 2005 and 2008 on samples of M. longissimus dorsi (LD) in Landrace (n 5 3838) and Duroc (n 5 2250) pigs included in the Norwegian pig breeding scheme. In addition, ultimate pH levels in the glycolytic LD (loin muscle) and M. gluteus medius (GM, ham muscle), and in the oxidative m. gluteus profundus (GP, ham muscle) were recorded as an extended data set (n 5 16 732 and n 5 7456 for Landrace and Duroc, respectively) from 1998 to 2008. Data were analysed with a multi-trait animal model using AI-REML methodology. Meat from Duroc had considerably more intramuscular fat (IMF), less moisture and protein, appeared darker with higher colour intensity and had lower drip loss than meat from Landrace. The heritability estimates (s. in LD all demonstrated moderate-to-high genetic variation for these traits in both breeds. Near infrared spectroscopy and EZ-DripLoss are modern technologies used in this study for the determination of chemical components and drip loss in meat. These methods gave higher heritabilities than more traditional methods used to measure these traits. The estimated genetic correlations between moisture and IMF in Duroc, and pH and drip loss in Duroc were both 20.89. Interesting differences between the two breeds in numerical value of some genetic correlations were observed, probably reflecting the differences in physiology and selection history between Landrace and Duroc. The estimated genetic correlation between drip loss and pH was much stronger in Duroc than in Landrace (20.89 and 20.63, respectively). This might be due to the high pH in Duroc, whereas Landrace had a lower pH closer to the iso-electric point for muscle proteins. The positive genetic correlation between the L* value in meat and IMF in Duroc (0.50) was an effect of differences in visible marbling, rather than meat colour. For Landrace, this correlation was negative (20.20). IMF content showed favourable genetic correlations to drip loss (20.36 and 20.35 for Landrace and Duroc, respectively).

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“…Boars showed a higher diameter of muscle fibre type IIA (fast-twitch, oxido-glycolytic) and IIB (fasttwitch, glycolytic) than gilts. Conversely, Larzul et al (1997) found higher area of muscle fibre type IIB in gilts than boars. Also, Bee (2004) detected higher area of muscle fibre in m. semitendinosus in gilts.…”

Section: Introductionmentioning

confidence: 81%

The effect of gender on the characteristics of muscle fibers in pork

Okrouhlá¹,

Čítek²,

Stupka³

et al. 2014

JCEA

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The aim of this study was to evaluate the influence of gender on the proportional representation of different types of muscle fibres and their selected characteristics. The experiment was carried out with the use of 72 crossbred pigs of final TOPIGS hybrid combination with balanced gender ratio (24 boars/24 gilts/24 barrows) at an average live weight of 22.5 kg. The average slaughter weight of the animals was 108.7 kg. In order to determine the quantitative (number) and qualitative (area, diameter, length) characteristics of the muscle fibre, samples were obtained from the loin carcass part, specifically the muscle musculus longissimus lumborum et thoracis (MLLT). These samples were used for the manufacture and evaluation of permanent histological slides. There were negative correlations found between the number of muscle fibres and their size. Gilts had the highest number of muscle fibres (208.55) per measured surface (1 mm 2 ) and simultaneously the smallest diameter (66.31 μm) of muscle fibres in comparison with boars and barrows. Statistically significant (P<0.05) differences in the area and diameter of muscle fibres type IIA were detected between gilts and barrows.Keywords: gender, loin, muscles, pigs, type of muscle fibres Abstrakt Cílem práce bylo vyhodnotit vliv pohlaví na zastoupení jednotlivých typů svalových vláken a na jejich vybrané charakteristiky. Do pokusu bylo zařazeno 72 kusů jatečných prasat finální hybridní kombinace TOPIGS, vyrovnaného pohlaví (24 vepříků/24 prasniček/24 kanečků). Při naskladnění měla prasat průměrnou hmotnost 22,5 kg. Průměrná porážková hmotnost sledovaných zvířat byla 108,7 kg. Za účelem sledování kvantitativních (počet) a kvalitativních (plocha, obvod, tloušťka) charakteristik svalových vláken byly odebrány vzorky z jatečné partie pečeně ze svalu musculus longissimus lumborum et thoracis. Tyto vzorky byly použity ke zhotovení a vyhodnocení trvalých histologických preparátů. Mezi počtem svalových vláken a jejich velikostí se projevily negativní korelace. Prasničky měly nejvyšší počet Detailní abstraktVliv pohlaví nebo kastrace se projevuje zejména po dosažení pohlavní dospělosti -do živé hmotnosti prasat 50 -70 kg je efekt samotný zanedbatelný. Rozdíly mezi kanci a prasničkami v počtu svalových vláken může být způsoben právě hormonální aktivitou. Cílem práce bylo zhodnotit vliv pohlaví na zastoupení jednotlivých svalových vláken a jejich charakteristiky u prasat. Pokus byl realizován se 72 kusy prasat finální kombinace TOPIGS (24 vepříků, 24 prasniček, 24 kanečků). Pokus byl ukončen při průměrné porážkové hmotnosti prasat 108,7 kg. Byly analyzovány vzorky z jatečné partie pečeně (musculus longissimus lumborum et thoracis -MLLT). Získané vzorky byly použity k tvorbě trvalých histologických preparátů. Vzorky byly zmrazeny pomocí tekutého dusíku, krájeny pomocí Leica microtome, obarveny, fixovány na sklíčka a zhotoveny obrázky histologických řezů pomocí optického mikroskopu s fotoaparátem. Získané hodnoty byly vyhodnoceny statistickým programem SAS. Kvantitativní (po...

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Phenotypic and genetic parameters for longissimus muscle fiber characteristics in relation to growth, carcass, and meat quality traits in large white pigs.

Cited by 297 publications

References 44 publications

The effect of sex and slaughter weight on intramuscular fat content and its relationship to carcass traits of pigs

The effect of sex and slaughter weight on intramuscular fat content and its relationship to carcass traits of pigs

Genetic parameters of meat quality traits in two pig breeds measured by rapid methods

The effect of gender on the characteristics of muscle fibers in pork

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