カンキツ新品種‘湘南ゴールド'

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  • Studies on meat quality of pigs crossbred with wild boar. 3. Effects of the difference in live weight on meat quality after fattening for the same period with the same age in months.
  • イノブタの肉質に関する研究　ＩＩＩ　　同一月令肥育後の生体重の相違が肉質に与える影響
  • カンキツ シン ヒンシュ ショウナン ゴールド
  • 3. Effects of the difference in live weight on meat quality after fattening for the same period with the same age in months
  • 3. 同一月令肥育後の生体重の相違が肉質に与える影響

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It is known that there are considerable differences in live weight of individual pigs crossbred with wild boar even when they are at the same age in months. In order to investigate the relationship between the differences in live weight and the meat quality, ten crossbred animals of the same age in months were fattened for approx. 8 months, and they were divided according to the body weights upon slaughter into the group with light weight (2 castrated males and 3 females with a mean weight of 74.9kg) and the group with heavy weight (2 castrated males and 3 females with a mean weight of 88.6kg). The differences in the carcass traits and physico-chemical properties of muscles and adipose tissues were examined, obtaining the following results.<br>The yield (in percentage) of dressed carcass, I and II of loin length and ratio of the middle part were significantly larger in the heavy weight group, while the ratio of hind quarters tended to be larger in the light weight group. As to the ratios of composition of bone, fat and muscle in hind quarters, the ratio of fat was significantly higher in the heavy weight group than in the light weight group, while those of muscles and bones were significantly higher in the light weight group. The loin area and fat thickness tended to be larger in the heavy weight group.<br>No appreciable variations were found out with animals of different body weights in terms of physicochemical properties of muscles such as chemical composition of muscle tissues and color shade of M. longissimus dorsi, but the ratio of crude fat tended to be larger in the heavy weight group.<br>As for the properties of back fat and kidney leaf fat, melting point of fat tended to be higher and both iodine value and refractive index tended to be lower in the heavy weight group.<br>In conjunction with the composition of fatty acids in the muscles, the content of oleic acid was higher and that of linoleic acid was lower in the heavy weight group than in the light weight group. The content of linoleic acid in the back fat was significantly higher in the light weight group, and the content of linoleic acid in kidney leaf fat was higher and that of oleic acid in it was lower in the light weight group than in the heavy weight group.<br>The above mentioned results suggested that the light weight pigs crossbred with wild boars tended to have softer fat in view of the properties of their adipose tissues and the fatty acid composition.

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