空间搭载对云南两个粳稻软米品系千粒重和粒形产生的影响  

STUDY ON VARIATION OF 1000-GRAIN WEIGHT AND GRAIN SHAPE OF TWO Japonica SOFT RICE LINES INDUCED BY SPACE FLIGHT

作　　者：苏振喜[1] 张小明[2] 廖新华[1] 赵国珍[1] 朱振华[1] 世荣[1] 蒋聪[1] 邹茜[1] 

机构地区：[1]云南省农业科学院粳稻育种中心,云南昆明650205 [2]浙江省农业科学院,浙江杭州310021

出　　处：《核农学报》2010年第1期7-11,共5页Journal of Nuclear Agricultural Sciences

基　　金：国家863计划(007AA100101);云南省攻关项目(2006NG04)

摘　　要：为选育软米高千粒重的新种质材料,利用＂实践八号＂航天育种卫星搭载2个云南粳稻软米品系云粳20号和H559种子,进行15d诱变处理,对SP3种子千粒重及其粒型诱变效果进行分析。结果表明,2个供试品系空间诱变后的千粒重和粒形发生了有益变异,云粳20号千粒重突变频率为11.7%,H559千粒重突变频率为10%,变异幅度分别为20.66-28.28g和20.78-28.34g,与对照相差最大为6g以上;云粳20号粒长突变频率为15%,H559突变频率为12%,变异幅度分别为5.1-7.6 mm和5.0-7.5 mm,与对照相差最大为2.4mm;云粳20号粒宽突变频率为13.5%,H559突变频率为10%,变异幅度分别为2.9-3.9 mm和2.9-3.7 mm,与对照相差最大为0.4mm;进一步分析表明,千粒重与粒长和粒宽成显著正相关,相关系数分别为0.44和0.49。航天诱变导致了千粒重和粒形性状变异,出现了高千粒重软米新材料。Dry seeds of two soft rice cultivars,Yunjing 20 and H559,were carried out for mutagenesis by space flight for 15d.The mutagenic effects of SP_3 generation on 1000-grain weight and grain shape were analyzed.The range of 1000-grain weight was 20.66~28.28g and 20.78~28.34g with a mutagenic rate of 11.7% and 10% for Yunjing 20 and H559,respectively.Variation range of grain length was 5.1～7.6mm and 5.0~7.5 mm,mutagenic rate was 15% and 12%,respectively.Variation range of grain width was 2.9～3.9 mm and 2.9~3.7 mm,mutagenic rate was 13.5% and 10% respectively.It was further analyzed that 1000-grain weight was notable positive correlation with both grain length and grain width,coefficient were respectively 0.44 and 0.49.So the changes of 1000-grain weight and grain shape were induced by space mutation,and new materials of high 1000-grain weight were obtained.

关 键 词：水稻 软米 航天诱变 突变频率 千粒重 

分 类 号：S511.22[农业科学—作物学]