Seasonal effects on Ca2+ transport of sarcoplasmic reticulum and on meat quality of pigs with different malignant hyperthermia status

Küchenmeister, U.; Kuhn, Gerda; Ender, K.

doi:10.1016/s0309-1740(99)00149-7

Cited by 40 publications

(21 citation statements)

References 21 publications

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“…A higher light reflectance in pork loin and ham from pigs slaughtered at high temperatures (35°C) was also reported by Santos et al (1997) and Fraqueza et al (1998) and confirms the negative effect of heat stress on the postmortem muscle metabolic process resulting in inferior pork quality (Küchenmeister et al, 2000).…”

Section: Effect Of the Season Of The Yearsupporting

confidence: 77%

Effects of the season of the year, truck type and location on truck on skin bruises and meat quality in pigs

et al. 2007

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Section: Effect Of the Season Of The Yearsupporting

confidence: 77%

Effects of the season of the year, truck type and location on truck on skin bruises and meat quality in pigs

et al. 2007

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“…Hot summer weather can also be of influence on meat quality. In the course of an experiment MHR as well as MHS pigs were slaughtered in summer (temperatures 25 to 30 o C) or in winter (temperatures -3 to +3 o C) (KÜCHENMEISTER et al, 2000). The Table shows meat quality parameters determined in this experiment.…”

Section: Effect Of Season (Temperature) On Ca 2+ Transport and Meat Qmentioning

confidence: 99%

Regulation of intracellular Ca<sup>2+</sup> concentration and meat quality in pigs

Küchenmeister

Kuhn

2003

Arch. Anim. Breed.

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The meat quality of pigs is essentially dependent on the rate and intensity of energy metabolism after slaughter. The major cellular processes in muscle cells are regulated by the Ca 2+ concentration in the cytoplasm, stimulating different energy consuming ATPases. The most essential regulator of the Ca 2+ concentration is the sarcoplasmic reticulum (SR) with its membranes, the SR Ca 2+ ATPase (Ca 2+ pump), and the calcium release channel (CRC). Defects of one or more of these elements will be of influence on the metabolism and ultimately on the meat quality. This is widely investigated in pigs with a mutated CRC. However, pigs without a mutation in the CRC also show a wide variability in their meat quality, dependent on other factors e.g. stress or season of the year. The variability in meat quality in these "normal" pigs is at least partly a result of differences in SR Ca 2+ transport and the resulting metabolism. IntroductionThe pig breeding systems aiming for an increase of the lean meat percentage have been very successful in the preceding decades. However, parallel with an increased meat content there was an increasing part of carcasses showing inferior meat quality and also an increase in losses by death during transportation or other kinds of stresses. A major reason for this relationship has been shown to be a mutated calcium release channel (CRC) of the sarcoplasmic reticulum (SR) (MCLENNAN and PHILLIPS, 1992). It turned out, that this mutation causes an insufficient regulation of the intracellular Ca 2+ concentration, activating metabolic processes not only in the live pig muscle, but also after slaughtering the animals. Currently all major pig producing

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“…Seasonal effects on instrumental color values have been investigated. L* values (paler muscle in the summer) have been attributed to changes in the calcium release channels (Kuchenmeister et al, 2000). Others have reported that in addition to weather, seasonal increases in demand, production, and harvest rate may detrimentally affect pork color (O'Neill et al, 2003).…”

Section: Animal Handlingmentioning

confidence: 99%

Prediction of Japanese color score

et al. 2010

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The objective of our study was to explore relationships between Japanese color score (JCS) and pork-quality attributes and develop equations to predict JCS. Pork carcass traits in population one (n = 781) was used to develop prediction equations and population two (n = 684) was used to test the equations for accuracy. Pearson's correlation coefficients found firmness, ultimate pH, drip loss percentage, L*, a*, b*, hue angle, and chroma were significantly (P < 0.01) correlated to JCS. Correlation loading found 96% of the variation in firmness, pH, drip loss percentage, L*, a*, b*, and hue angle explained 81% of the variation in JCS. Three prediction equations were developed using these traits. Averages for population one traits were used to develop the initial prediction equations. Predicted JCS, which fell within ±0.25 of the actual JCS, were retained and multiple linear regression (MLR) was run, resulting in the first prediction equations. Data from population two were then used to evaluate the success of these equations. of the actual JCS, respectively. All prediction equations predicted 92% or more of the JCS observations within ±0.50 and would be useful when sorting pork carcasses for export to valuable Asian markets. The second and third prediction equations would be advantageous as they require fewer measurements and could be more rapidly collected.

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Seasonal effects on Ca2+ transport of sarcoplasmic reticulum and on meat quality of pigs with different malignant hyperthermia status

Cited by 40 publications

References 21 publications

Effects of the season of the year, truck type and location on truck on skin bruises and meat quality in pigs

Effects of the season of the year, truck type and location on truck on skin bruises and meat quality in pigs

Regulation of intracellular Ca<sup>2+</sup> concentration and meat quality in pigs

Prediction of Japanese color score

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Seasonal effects on Ca2+ transport of sarcoplasmic reticulum and on meat quality of pigs with different malignant hyperthermia status

Cited by 40 publications

References 21 publications

Effects of the season of the year, truck type and location on truck on skin bruises and meat quality in pigs

Effects of the season of the year, truck type and location on truck on skin bruises and meat quality in pigs

Regulation of intracellular Ca&lt;sup&gt;2+&lt;/sup&gt; concentration and meat quality in pigs

Prediction of Japanese color score

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Regulation of intracellular Ca<sup>2+</sup> concentration and meat quality in pigs