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二、目前杂交小麦研究的几个主要问题及其展望1.杂交优势问题杂交小麦研究的最终目的是利用 F_1的杂种优势为小麦增产服务。在常规育种 F_1代我们常常看到有穗大穗多粒大粒多等明显的杂种优势现象。1973—1974年,我们做了一个包括阿夫、丰产3号、墨巴66等7个品种人工去厷授粉的双列杂交试验,测定结果21个组合每株产量平均杂种优势36.8%,平均超亲优势15.2%。产量构成三因素即每株穗数、每穗粒数和千粒重的平均杂种优势分别
Second, the current study of several major issues and prospects of hybrid wheat 1. The advantages of hybridization The ultimate goal of hybrid wheat research is to use F_1 heterosis for wheat yield. In the conventional breeding F_1 generation we often see the spike large spike and more grain and more obvious heterosis. From 1973 to 1974, we did a double crossover experiment including artificial dehypoclasis pollination of seven cultivars including Ave, Fengshen 3 and Mbab 66. The results showed that the average yield per plant in the 21 combinations was 36.8% Pro-advantage 15.2%. Yield composition of three factors per panicle, grains per spike and 1000-grain average heterosis, respectively