中國畜牧學會會誌41

中國畜牧學會會誌41(增刊)	,2012
J. Chin. Soc. Anim. Sci. 12(Suppl.)

畜產試驗所育種場前身為核心豬場南站，在 2002年之後其場內有純種豬藍瑞斯(L)、約克夏(Y)、杜洛克(D)及盤克夏(B)四個品種。本研究應用從2002年至2011年底分娩之 449胎L (35父畜與133母畜)、89胎Y (5父畜與23母畜)、135胎D (10父畜與39母畜)及155胎B (10父畜與 49母畜)，進行純種豬繁殖性能之分析，分析性狀包括出生窩仔數、出生活仔數、出生體重及21日齡體重。各品種之間，就出生窩仔數與出生活仔數兩性狀而言，L最高，且顯著高於Y (P < 0.05)；Y次之，顯著高於B與D (P < 0.05)，B與D之間差異不顯著。在出生體重性狀方面，不分性別，仍以L最高，且顯著高於D (P < 0.05)；D次之，顯著高於B與Y (P < 0.05)，B與Y之間差異不顯著。公仔豬的21日齡體重大小依序為L、Y、D及B，而母仔豬的21日齡體重大小依序為L、D、Y及B，且相同性別下，各品種間皆有顯著差異。綜合上述結果顯示畜產試驗所育種場 L母豬有較優良的繁殖性能。

COMPARISON OF PUREBRED FOR LITTER SIZE AND PIGLET BODY WEIGHT AT THREE WEEKS OF AGE IN A NUCLEAR HERD

N. T. Yen, Y. Y. Lai, C. H. Chen and M. C. Wu Livestock Research Institute, Council of Agriculture, Executive Yuan

Breeding Farm of Livestock Research Institute is the predecessor of the South Division of National Swine Nucleus Herd. There were four purebreds, i.e., Landrace (L), Yorkshire (Y), Duroc (D) and Berkshire (B) since 2002 in the Breeding Farm. The reproductive records including litter size at birth, number born alive, and body weights at birth and at 21 days from 449 litters of Landrace (from 35 sires and 133 sows), 81 litters of Yorkshire (5 sires and 23 sows), 127 litters of Duroc (10 sires and 39 sows) and 155 litters of Yorkshire (10 sires and 49 sows) purebred sows during 2002 to 2011 in the Breeding Farm were analyzed in this study. Among the breeds, for the litter size at birth and number born alive, L was significantly higher than Y (P < 0.05), and Y was significantly higher than D (P < 0.05). There was no difference between B and D. For the body weight at birth, regardless of gender, L again was significantly higher than D (P < 0.05), and D was significantly higher than B (P < 0.05). There was no difference between B and Y. The body weight at 21 days from heavier to lighter for male piglets was L, Y, D and B, while the order for the female piglets was L, D, Y and B. There were significantly differences among breeds under the same gender. The results showed that L sow in the Breeding Farm had the best reproductive performance.