|J. Chin. Soc. Anim. Sci. 36(Suppl.)|
賴永裕(1) 顏念慈(1) 蘇清全(1) 李恆夫(1) 劉桂柱(2) 吳明哲(1)
On-farm test for reproductive performance of boars and its application
Y. Y. Lai(1), N. T. Yen(1), C. C. Su(1), H. F. Lee(1), K. C. Liu(2), M. C. Wu(1)
(1)Livestock Rsearch Institute, Council of Agriculture
(2) Formosan Industry Association for Swine Improvement
Participants of on-farm test for reproductive performance (OTRP) of boars were 21 breeding farms, member of Formosan Industry Association for Swine Improvement (FIASI).The young boars were eight to ten months old and tested free of porcine stress syndrome (PSS) provided by members of FIASI for the public auction. Boars tested in the period from 7 to 21 days before the public auction depend on the schedule arranged by the association. In total, there were 7 times auctions and 275 Durocs, 88 Landraces and 18 Yorkshires were certified for the semen characteristics. The results showed 5.1% Duroc and 2.3% Landrace had sperm motility problem, and 1.8% Duroc and 5.7% Landrace had trouble on low sperm concentration. Only Duroc had the weakness of penis deformity with a frequency of 2.2%. No significant associations were detected for penis length with semen volume or with semen quality. The average boar auction price of before and after OTRP practice were -6,298 NT dollars difference for Duroc, but were + 4,127 dollars and + 4,363 dollars for Landrance and Yorkshire.
Key Words: boar, Reproductive performance