豬隻肋骨數之遺傳區域

廖仁寶 張秀鑾 賴永裕 劉錦條 顏念慈 劉振發 吳明哲

行政院農業委員會畜產試驗所

應用豬隻微衛星型標記包括在第一號染色體上的SW552、S0316、SW2130及SW780與第七號染色體上的SW1122、SW147、SW252、S0115及SW764共計九種，檢測自肉豬群中取得之14對和17對肋骨數的肌肉樣本。結果經卡方分析顯示：肋骨數與第一號染色體短臂上的S0316和第七號染色體長臂上的SW1122、SW252及S0115有顯著的相關。由此可知豬第七號染色體長臂的2.4-2.5區域可能含有控制肋骨數的基因。而由雜交豬F1和F2屠體性狀的調查發現，具14對和17對肋骨數的豬隻頻率最低（＜5％），具16對者則佔最多數（55.22％），此外，亦可發現肋骨數左右側不等的情形，其發生比率為5.22％（7/134）。綜合初步試驗結果與本研究發現與肋骨數相關的基因可能位於第一號和第七號染色體上。

關鍵語：豬、肋骨、微衛星型標記。

THE GENETIC REGIONS FOR PORCINE RIB NUMBERS

R. B. Liaw, H. L. Chang, Y. Y. Lai, C. T. Liu, N. T. Yen, C. F. Liu and M. C. Wu

Taiwan Livestock Research Institute, Council of Agriculture

A total of nine porcine microsatellite markers including SW552, S0316, SW2130 and SW780 on chromosome 1 and SW1122, SW147, SW252, S0115 and SW764 on chromosome 7 were used to genotype 14 and 17 rib-pair samples, which were from hog market. The result of chi-squared test between makers and number of rib pairs indicated that number of rib pairs and markers S0316 on chromosome 1 and SW1122, SW252 and S0115 on chromosome 7 were significantly related. By this, there was probably a gene for number of rib pairs on porcine chromosome 7q 2.4-2.5. In the investigation of carcass traits of hybrids F1 and F2, the frequencies of the pigs with 14 and 17 rib pairs were the least(＜5％), but those with 16 rib pairs were the majority (55.22%). Besides, the asymmetry of left and right rib pairs was found in the study, and the frequency was 5.22% (7/134). In conclusion, the genes for number of rib pairs probably located on porcine chromosome 1 and 7 from preliminary result and this study.

Key Words: Swine, Rib, Microsatellite marker.