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本研究根据提供高产近交系的能力比较了小麦育种的两种选择程序:第一个程序.是根据杂交性状在F_3代杂交种之间进行早代选择。第二个程序.把选择过程延长到F_6代.F_6是单粒传(SSD)后代。在2年试验中.利用春小麦假系.对上述2种程序进行了评价。这些假系是由混合品种构成的.它能用于评估真实遗传参数。通过这种途径可以鉴定预测的准确性。在比较研究的第一年中.实际选择过程早已进行.在第二年中.分别根据F_3和F_6选择系对F_6和F_7代品系进行了摸拟.并在大田试验中进行了鉴定。本研究在第二年后就给出了最终结果。比较研究刚进行一年就发现对F_3杂交种的评估极不准确.相反.来自SSD—F_6的选择系却表现良好。这就产生了一批具有来自SSD—F_6的高产品系。尽管在基因型和年份间存在着明显的互作.但从杂交种F_3选择而来的F_7和F_6系之间存在着产量水子差异。由此可以推断。早代选择法不如快速一粒传法优越。
In this study, two selection procedures for wheat breeding were compared based on the ability to provide high-yielding inbred lines: The first procedure was to select early generations of F_3 hybrids based on cross traits. The second procedure extends the selection process to the F_6 generation, which is a single shot (SSD) offspring. In the 2-year trial, the above two programs were evaluated using spring wheat fake lines. These fake ties are made up of mixed breeds and can be used to evaluate real genetic parameters. In this way, the accuracy of the prediction can be verified. In the first year of the comparative study, the actual selection process had already taken place, and in the second year F_6 and F_7 lines were tested according to F_3 and F_6 selection lines, respectively, and identified in field trials. This study gives the final result after the second year. In the comparative study, the evaluation of F_3 hybrids was found to be inaccurate in just one year, whereas the selection from SSD-F_6 performed well. This resulted in a number of high-product lines with SSD-F_6. Despite significant interactions between genotypes and years, yield-water differences exist between the F_7 and F_6 lines selected from the hybrid F_3. From this we can infer. Early selection method is not as fast as a pass method superior.