论文部分内容阅读
对小麦抗赤霉病基因库5个不同轮选群体进行初步分析表明:基因库群体平均抗赤霉病性得到显著提高,抗病植株频率增大;株高、单株穗数、穗长、小穗密度、总小穗教、结实小穗数和每稳粒数等农艺性状大多没有明显的不良变化,并与抗赤霉病性无必然不利的联系;群体遗传变异得到较好保持。抗源库抗赤霉病性改良效果优于长期库,可育株的抗性水平较不育株高。通过基因库的进一步建拓和改良,可望从中选育出符合生产和育种需要的高产抗病新品种和优良新抗源。
The preliminary analysis of five different rounds of wheat pan-scab resistance gene cluster showed that the average resistance to scab in the gene pool was significantly increased and the frequency of disease-resistant plants was increased. The plant height, number of panicles per panicle, panicle length, Most of agronomic traits such as spikelet density, total spikelet number, number of robust spikelets and per grain number did not show any obvious adverse changes, and had no negative connection with resistance to scab. The population genetic variation was well maintained. The anti-scab resistance of the anti-source library was better than that of the long-term library, and the resistant level of the fertile plants was higher than that of the sterile plants. Through the further development and improvement of the gene bank, it is expected that a new high-yield disease-resistant variety and a good new source of resistance that meet the needs of production and breeding will be bred.