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七个大豆品种Bragg、Ankur、Semmes、PK-71-39,UPSM-229、UPSM-534,Type-49种子各200粒,用10kR、15kR、及20kR γ射线照射。把照射和未照射的种子同时在雨季进行单行种植,成熟时分别单株收获。M_2代单株于次年雨季种植,并筛选大突变。所有的M_2代都未分离出大突变,各个处理混合收获,获得M_3代种子。将7个品种分别用γ射线0kR、10kR、15kR及20kR照射。处理的M_3代在下一年的雨季进行试验,随机区组排列,4次重复。每小区种5行,行长6米,行距60公分,株距4—5公分。发芽后立即在每小区的中间3行随机选取15株,观察其开花日数、成熟日数、株高、每株荚数、每荚粒数、每
Two seeds of seven soybean varieties Bragg, Ankur, Semmes, PK-71-39, UPSM-229, UPSM-534 and Type-49 seeds were each irradiated with 10kR, 15kR and 20kR gamma rays. The irradiated and non-irradiated seeds were planted in a single row in the rainy season and harvested separately at maturity. M_2 plants were planted in the following rainy season and large mutations were screened. All the M_2 generations did not isolate a large mutation, each treatment mixed harvest, access to M_3 generation seeds. Seven varieties were irradiated with γ-rays 0kR, 10kR, 15kR and 20kR, respectively. Treated M_3 generation in the next rainy season trials, randomized block arrangement, 4 times repeated. Each district 5 kinds of lines, president of 6 meters, 60 cm spacing, spacing 4-5 cm. Immediately after germination, 15 plants were randomly selected in the middle of each plot. The number of flowering days, mature days, plant height, pods per plant, number of pods per pod,