摘要
以１０ｋｒａｄ、１２ｋｒａｄ和１５ｋｒａｄ３种剂量γ射线处理甘蓝型油菜品系７２１和９０８的风干种子。辐射处理的种子发芽势随照射剂量增加而下降，但发芽率并未受到明显影响。辐射处理对Ｍ１的株高及生长量有明显抑制，其中，受１５ｋｒａｄ辐射处理品系９０８出苗后５５ｄ全部死亡，７２１比９０８具有较强的抗辐射能力。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。受１０ｋｒａｄ处理的Ｍ２株高和分枝部位降低，分枝数增加，但单株产量并无显著变化。从Ｍ２选出的低分枝部位突变体能稳定遗传。
Seeds from two Brassica napus lines, 721 and 908, were irradiated by γ ray at doses of 10 krad, 12 krad and 15 krad, respectively. Germination potential of treated seeds were decreased with the increase of irradiation doses, but the germination percentage was not significantly different between treatments and control. It was observed that significant inhibition of plant height and biomass occured in plants of M 1 generation, and that all the seedlings from 15 krad treated 908 seeds were dead at 55th days after sowing. Data from M 1 analysis showed that line 721 was more tolerent to γ ray than line 908. A number of quantitative traits were investigated to verify the effects of radiation, and the responses to γ ray treatment varied with traits considered. Of them primary branch height seemed most detectable in irradiation effects. Plant height and primary branch height in M 2 individuals derived from 10 krad treated 908 seeds were observed decrease and primary branch numbers increased, but no sustantial change of seed yield per plant was found. Mutants with reduced primary branch height in M 2 were identified and confirmed bred true through consecutive examination in following generations.
出处
《中国油料作物学报》
CAS
CSCD
北大核心
1998年第4期1-5,共5页
Chinese Journal of Oil Crop Sciences
基金
国际原子能机构的部分资助
关键词
甘蓝型油菜
Γ射线
诱变育种
Brassica napus γ ray irradiation Induced mutation breeding
