国家自然科学基金项目(面上项目,重点项目,重大项目)
The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)
南京农业大学细胞遗传研究所选育的小麦-簇毛麦6VS/6AL易位系在6VS上携有Pm21基因,用它作抗源已选育出一批高抗白粉病的新品系和新品种。为了研究6VS/6AL易位染色体对普通小麦农艺性状的影响,本研究选用由不同生态类型的推广品种与6VS/6AL易位系经过杂交回交选育的11个高代品系(种)及其轮回亲本和3份涉及6VS/6AL的高代分离品系以及5个F2群体,对产量、株高、穗长、穗粒数、穗粒重和千粒重等农艺性状进行比较分析。结果表明,6VS/6AL易位染色体对后代的小穗数、穗粒数、穗粒重和产量等农艺性状没有表现出明显的影响,对穗长和千粒重表现出一定的正向效应。多数6VS/6AL衍生品系的株高与亲本相比有所增加,但在同一组合的不同品系之间表现出一定的差异,在育种过程中通过选择能够改变增高趋势。6VS/6AL易位系对白粉病免疫,并且遗传稳定,对小麦的抗病育种是很有潜力的抗源亲本。
In order to study the effects of the wheat-Haynaldia villosa 6VS/6AL translocation chromosome on agronomic traits of common wheat, eleven derived advanced lines carrying 6VS/6AL translocation chromosome and their respective parents, three segregation advanced lines and five F2 population with and without the 6VS/6AL translocation chromosome were selected and analysed for agronomic traits. In general, there were no significant differences between 6VS/6AL lines and their recurrent parents in agronomic traits, including grain yield, spikelets, grains/spike and grain weight/spike. 6VS/6AL lines showed slightly but significantly higher thousand-kernel weight and spike length. Most 6VS/6AL derivatives showed higher plant height than their control parents. However, significant variation occurred for this trait among sister lines from the same cross, indicating that additional selection could lead to further improvements. It was concluded that the 6VS/6AL translocation can be used in wheat breeding programs as a donor of resistance to powdery mildew with no obvious undesirable effects on agronomic traits.
李桂萍,陈佩度,张守忠,等.小麦-簇毛麦6VS/6AL易位染色体对小麦农艺性状的影响[J].植物遗传资源学报,2011,12(5):744-749.
复制