海南岛繁殖加代在大豆辐射育种中的应用研究

用五种剂量＾６０Ｃｏγ射线辐射４个大豆稳定品系的风干种子，研究海南繁殖岛加代在大豆辐射育种中的可行性，结果表明，海南岛种植Ｍ１比北方各上可获得更高的存活率放出现较多的不孕、半不孕植株。北方种植Ｍ１的半致死剂量为１６ＫＲ左右，海南岛种植Ｍ１时可加大剂量至２０ＫＲ。经南方加代后的Ｍ２在成熟期、百粒重及蛋白质含量方面比北方Ｍ１产生的Ｍ２变异幅度更大，出现早熟、大粒、高蛋白质含量植株机率高。

STUDY ON OFF-SEASON PLANTING IN HAINAN ISLAND TO ADVANCEGENERATIONS IN SOYBEAN RADIATION BREEDING

The feasibilyty of planting M1 in Hainan island was studied by using of seeds of four soybean lines with five dosages of 60 Co -ray. It was showed that the percentage of survival plants, sterile and semi-sterile plants were higher for the treated seeds planted in Hainan island than those planted in northeast, Harbin. The dose of 50% M1 lethal was around 16KR when planted in North, and 20KR when planted in Hainan. The segregation range of M2 was larger for planted M1 in Hainan island than in north on maturity, weight per hundred seeds and protein content. The probability of occurrence of early maturity, large seeds, high protein plants were more in M2 planted in south than planted in north.