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冬小麦品种经γ辐射处理后再作亲本,M_1F_1代能明显地表现杂种优势,有的性状甚至优于正常亲本的相同组合。M_1F_1多数组合的穗长、穗粒数、千粒重劣于F_1,但也有约14％的组合优于F_1,M_2F_2有70％的组合蛋白质含量比F_2高。配合力分析表明,本试验5个亲本辐射后均有不少性状提高了一般配合力,其中蚰64(亲本3)M_1F_1代的穗长、小穗数、穗粒数、千粒重和M_2F_2代的千粒重、蛋白质、干面筋含量都提高了一般配合力;其次为密穗早(亲本1)M_1F_1代的小穗数、穗粒数和M_2F_2代的小穗数、穗粒数、蛋白质含量和沉淀值都提高了一般配合力。有些性状亲本辐射后明显地提高了特殊配合力。
The winter wheat cultivars were treated with γ radiation before they were used as parents. M_1F_1 generation could express heterosis obviously, and some traits even surpassed the same combinations of normal parents. Most combinations of M_1F_1 had spike length, kernel number per spike and 1000-grain weight inferior to F_1. However, about 14% of the combinations were better than F_1, 70% of M_2F_2 had higher protein content than F_2. Combining ability analysis showed that there were many traits in the five parents to enhance the general combining ability, among which, spike length, spikelet number, spikelet number, 1000-grain weight and 1000-grain weight of M_2F_2 generation in 64 (Parents 3) , Protein and dry gluten increased the general combining ability, followed by the spikelet number, the number of spikelets and the number of spikelets per spike, the number of spikelets per panicle, the protein content and the sedimentation value of M_1F_1 generation Improve the general combining ability. Some characters of parental radiation significantly increased the special combining ability.