多產豬種之培育：Ⅵ. 梅山豬與杜洛克豬雜交二代產仔性能

張秀鑾⁽¹⁾ 黃憲榮⁽²⁾ 張伸彰⁽²⁾ 許晉賓⁽²⁾ 李世昌⁽¹⁾ 涂海南⁽²⁾ 吳明哲⁽³⁾

⁽¹⁾行政院農業委員會畜產試驗所遺傳育種組 ⁽²⁾行政院農業委員會畜產試驗所高雄種畜繁殖場
⁽³⁾行政院農業委員會畜產試驗所新竹分所

本研究旨在評估梅山豬(M)與杜洛克(D)豬雜交二代產仔性能，供作未來新品種(系)豬隻培育之參考。試驗豬群源自MD母豬(M母豬與配D公豬)與配MD或DM(D母豬與配M公豬)公豬產生之雜交二代(包括MDMD與MDDM兩種遺傳組合)，經正反雜交產生四種雜交三代遺傳組合。分析資料來自37頭種公豬與119頭種母豬所分娩202胎之產仔性能，評估性狀包括分娩總仔數、活仔數、三週齡與離乳窩仔數、分娩活仔豬窩重、出生個體重、三週齡與離乳個體重、仔豬出生存活率與三週齡育成率。經矯正母豬分娩季節與分娩產次後，比較仔豬離乳前之各項窩仔性能發現，除仔豬出生重(P<0.01)外，其餘各性狀之遺傳組合效應均不顯著(P>0.05)。但前述產仔性狀卻顯著地受到分娩季節與母豬分娩產次的影響(P<0.01)。

關鍵語：豬、品種、產仔性能。

DEVELOPMENT OF PROLIFIC LINE IN SWINE: VI. LITTERING PERFORMANCES IN
F2 OF MEISHAN AND DUROC CROSSES

H. L. Chang⁽¹⁾, H. J. Huang⁽²⁾, S. C. Chang⁽²⁾, C. B. Hsu⁽²⁾, S. C. Lee⁽¹⁾, H. N. Twu⁽²⁾, M. C. Wu⁽³⁾

⁽¹⁾Breeding and Genetics Division ⁽²⁾ Kaohsiung Animal Propagation Station
⁽³⁾ Hsinchu Branch, Livestock Research Institute, Council of Agriculture, Executive Yuan

The objective of this study was to evaluate the littering performances in F2 of Meishan (M) and Duroc (D) crosses for the reference of potential new breed/strain exploration in Taiwan. Parental stocks of tested animals were originated from MD (progeny of M sow sired by D boar) sows mated with MD or DM (progeny of D sow sired by M boar) boars, i.e., MDMD or MDDM genetic combination group in the F2 generation. Thus, all animals evaluated could be classified as one of the four genetic groups, which were from MDMD and MDDM crosses. A total of 37 boars and 119 sows were used to produce 202 litters. Littering traits evaluated were liter size at birth, born alive, at three weeks of age, and at weaned, litter weight and individual weight at birth, at three weeks of age and at weaned, and piglet survivability at birth and at three weeks of age. Results indicated that no significant genetic group effects on traits analyzed in this study except for piglet birth weight after records being pre-adjusted for farrowing season and sow’s parity. However, F2 sows produced larger litters in cool season than those in hot season (P<0.001), which was not the case in sows from previous generations. Parous sows produced more piglets than primarous ones (P<0.01) as expected.

Key words: Pig, Breed, Littering performances.