卫星搭载不同紫花苜蓿品种的生物学特性反应(简报)

太空育种具有变异多、幅度大、高产、优质、早熟及抗病力强等特点，是集航天技术、生物技术、农业育种技术于一体的农业育种新途径。以不同时期株高为指标，对3个紫花苜蓿Medicago sativa品种卫星搭载效应进行研究。结果发现，对于中苜一号，幼苗期卫星搭载株高显著低于地面对照，分枝期和初花期则相反，搭载后株高显著增加；对于龙牧803，卫星搭载后幼苗期和分枝期的株高显著增加，初花期则表现为无显著差异；对于敖汉苜蓿，卫星搭载植株在3个时期的株高都显著高于对照；研究结果表明，卫星搭载的生物学效应因品种和时期而异，这可能是由不同紫花苜蓿品种间诱变敏感性的差异引起的。

Biological characteristic response of different alfalfa varieties to mutation induced by space flight

Space breeding is a new way of agricultural breeding with high variation,high-yield,good-quality,early maturity and strong stress resistance.Effects of satellite carrying three Medicago sativa varieties were studied.The results showed that the plant height of Zhongmu No.1 at seedling stage was significantly lower than the ground control,but the height increased at branching and initial flowering stages;The height of Longmu 803 at seedling and branching stages had a significant increase,and that of initial flowering stages was not significantly different;The height of Aohan at three plants stages were significantly higher than that of control.In conclusion,different mutagenic effects of space flight differed with plant varieties and growth stages,this may be caused by different sensitivity to mutation from different alfalfa varieties.