摘要： 以800，1000和1200 Gy 3种剂量⁶⁰Coγ射线处理甘蓝型油菜品系761和532的风干种子。分析了⁶⁰Coγ射线辐射对油菜种子发芽率、主要农艺性状和品质性状的影响。结果表明：辐照处理的种子发芽率随照射剂量增加而下降，但不同基因型受到影响不同；辐射处理对M₁的株高及生长量有明显抑制，辐射处理不同数量性状的效应不一致，对分枝部位的效应最显著，但千粒重和每角果粒数无显著变化；800～1000 Gy辐照处理使油菜种子含油量有不同程度提高，脂肪酸中芥酸和油酸含量变异较大。

关键词: 甘蓝型油菜, ⁶⁰Co&gamma, 射线, 诱变育种, 农艺性状

Abstract: Seeds of Brassica napus lines 761 and 532, were irradiated by ⁶⁰Coγ rays with doses of 800, 1000, 1200 Gy, respectively. Our objectives were to investigate ⁶⁰Coγ rays influence on rapeseed seed germination rate, seed quality and main agronomic characters. The results showed that germination rate of treated seeds were decreased with the increase of irradiation doses, 532 was more tolerant to ⁶⁰Coγ rays than line 761. It was observed that significant inhibition of plant height and biomass occurred in plants of M₁ generation. A number of quantitative traits were investigated to verify the effects of radiation and the responses to ⁶⁰Coγ rays treatment varied with traits considered. Of them primary branch height seemed most detectable in irradiation effects, plant height and primary branch height in M₂ individuals were observed decrease, but no significant change of 1000-seed weight and seed number per siliqua. Treatment of 800-1000 Gy ⁶⁰Coγ rays irradiation increased oil content in different degrees, the oleic acid and erucic acid content have distinctly changed.

Key words: Rapeseed (Brassica napus L.), ⁶⁰Co&gamma, rays, Induced mutation breeding, Agronomic characters

中图分类号: 

• S634.301