【摘要】 将迟熟中、晚籼"GER-3"的干种子搭载返回式卫星,返地种植,在太空环境的综合诱变作用下,其后代产生多样性变异,表现多向性遗传。选择突变体,育成早熟、稳产、多抗、优质红米晚籼稻新品种"赣晚籼33号",与"GER-3"相比,其农艺、经济性状得到改善:分蘖力强、秆高不倒伏,不易落粒;每穗总粒数由79.4粒提高到98.15粒;生育期缩短10.56d。抗病性增强,稻瘟病接种鉴定3级,苗瘟0～3级、叶瘟2～4级、穗颈瘟0级,表现中抗至高抗。米质提高,定为国家标准二级优质米。更多还原

【Abstract】 The dry seeds of "GER-3"--a late-maturing medium or late indica rice variety were carried by retrievable satellite into outer space and mutated by many com prehensive outer space factors, after retrieving, their offsprings which were planted in the field performanced diversity of inheritance and mutation, "Ganwanxian 33"--a red quality indica rice variety was selected and bred from the mutants of "GER-3". In comparison with "GER-3", the agronomic and economic traits of "Ganwanxian 33" were improved: it had strong tillering ability, high and unflatten stem, unfallen seeds, its grains per panicle increased from 79.4 to 98.15, the total growth and developmental duration shortened by 10.56 days, it had middle or strong resistance to rice blast, its rice quality reached to Grade Ⅱ of national standard for good quality rice.更多还原