中文摘要：

用80Mev／u^12C^6＋离子对一株积累聚β-羟基丁酸酯（PHB）的芽孢杆菌（Bacilhus P-9）进行诱变选育，最终获得PHB高产株菌G15，其PHB产量达2．93g／L，与出发菌株相比较，PHB积累量提高了1．5倍。研究结果表明，本试验辐照最佳剂量为15Gy。重离子辐照诱变育种效果显著，具有广阔的发展应用前景。

英文摘要：

The PHB-producing strain of Bacillus P-9 was irradiated by 80 MeV/u ^12C^6＋ ion beams to increase PHB production. The results indicated that the best radiation dose is 15 Gy. One strain mutagenized the ^12C^6＋ ion beams, called G15, has the highest PHB production yield, showing final PHB concentration of 2.93 g/L, 1.5 times higher than that of original strain. The breeding effect of heavy-ion irradiation mutation is remarkable, and has a broad application prospect.