论文部分内容阅读
采用相互轮回选择的方法,对分别由20个自交系组成的吉综A、吉综B进行三轮选择,主要根据测交种的产量进行选择。在三个环境条件下,用随机区组、4次重复设计,对各轮群体及群体间杂交组合进行选择效果评价。研究结果表明:吉综A、吉综B群体及其杂交组合产量海轮分别增加177(2.4％)、126(1.7％)和263公斤/公顷(3.4％);群体组合杂种优势由C_0×C-0的7.4％增加到C_3×C_3的13.6％。其它农艺性状随各轮对产量相互轮回选择,发生了相应的变化。穗长增加,粒行数减少,株高和穗位增高。百株穗数、抽丝日数、倒伏率、大斑病和丝黑穗病的抗性变化不明显。群体杂交组合收获含水量增加,灌浆期延长。
By means of reciprocal selection, three rounds of selection of Jijia A and Jijia B, which are composed of 20 inbred lines respectively, are selected based on the yield of test cross. Under three environmental conditions, randomized block design and 4 repetitive designs were used to evaluate the effect of selection on the cross combinations of all rounds and groups. The results showed that the yield of the Qijia A and Jiqiao B populations and their hybrid combinations increased by 177 (2.4%), 126 (1.7%) and 263 kg / ha (3.4% 7.4% of 0 increased to 13.6% of C_3 × C_3. Other agronomic traits with the rotation of each round of production options, there has been a corresponding change. Spike length increased, grain number reduced, plant height and ear position increased. There was no obvious change in the resistance of one panicle per plant, the number of spinning days, the lodging rate, maculopathula and head smut. The population of hybrid combinations harvested water content increased, grain filling period prolonged.