Čandek-Potokar M, Lefaucheur L, Z̆lender B, Bonneau M
Agricultural Institute of Slovenia, Hacquetova 17, 1000 Ljubljana, Slovenia.
Meat Sci. 1999 Jun;52(2):195-203. doi: 10.1016/s0309-1740(98)00168-5.
The effect of increasing both weight and age or age alone through feed restriction on muscle longissimus dorsi histological characteristics were studied in relation to fresh and cooked meat quality. Starting at 83 days (32 kg) 80 crossbred Duroc × (Large White×Landrace) barrows were allotted within litter to 4 experimental groups (A100, R100, A130, R130). Pigs were fed either ad libitum (A) or were restricted 30% (R) and slaughtered either at 100 kg or 130 kg. Muscle fibres were classified as βR, αR or αW according to Ashmore and Doerr (1971)(Ashmore, C.R., & Doerr, L. (1971). Comparative aspects of muscle fibre types in different species. Experimental Neurology, 31, 408-418.). Percentages (PC), cross-sectional areas (CSA) and relative areas (RA) of each fibre type were evaluated. Phenotypic correlations between histological traits showed that RA of a particular fibre type depends essentially on its numerical abundance. Increasing weight together with age led to enlargement of βR and αW muscle fibres, without changing muscle histochemical profile. When age was increased at the same weight (restriction), higher RA of βR fibres was observed. Low, but significant correlation between loin eye area and CSA was observed, but not within experimental group. The phenotypic correlations between histological and meat quality traits were generally low. This material showed some significant correlations suggesting that increasing PC or CSA of overall αW fibres can be beneficial for water holding capacity of fresh meat and juiciness of cooked meat. ©
研究了通过限饲增加体重和年龄或仅增加年龄对背最长肌组织学特征的影响，并与鲜肉和熟肉品质相关联。从83日龄（32千克）开始，将80头杜洛克×（大白猪×长白猪）杂交公猪按窝分配到4个实验组（A100、R100、A130、R130）。猪只要么自由采食（A），要么限饲30%（R），并在100千克或130千克时屠宰。根据阿什莫尔和多尔（1971年）（阿什莫尔，C.R.，&多尔，L.（1971年）。不同物种肌肉纤维类型的比较方面。《实验神经病学》，31，408 - 418。）的方法，将肌纤维分为βR、αR或αW。评估了每种纤维类型的百分比（PC）、横截面积（CSA）和相对面积（RA）。组织学特征之间的表型相关性表明，特定纤维类型的RA主要取决于其数量丰度。体重和年龄同时增加导致βR和αW肌纤维增大，而肌肉组织化学特征未改变。当在相同体重（限饲）下增加年龄时，观察到βR纤维的RA更高。观察到腰眼面积与CSA之间存在低但显著的相关性，但在实验组内未观察到。组织学和肉品质特征之间的表型相关性一般较低。该材料显示出一些显著的相关性，表明增加总体αW纤维的PC或CSA可能有利于鲜肉的持水能力和熟肉的多汁性。©
