水稻耐盐碱与耐低磷分子聚合育种研究

Pyramiding Molecular Breeding on Tolerance to Phosphorus Deficiency and Saline-Alkaline in Rice

摘要:

本研究以长白9号导入系（耐盐碱）和Kasalath导入系（耐低磷）杂交后构建的聚合群体为材料，利用RM542标记和Postol1基因位点紧密连锁的标记分别进行耐盐碱和耐低磷基因检测，共获得16份聚合材料。经室内与大田自然条件鉴定，最终获得11份耐盐碱与耐低磷聚合材料。在土壤pH>8.5的情况下，这些材料的耐盐碱表现优于对照材料长白9号和Kasalath；在试验田土壤pH>8.5并不施磷肥条件下，有6份聚合材料的磷素利用率显著高于对照长白9号。

Abstract:

In this study, a total of 16 polymeric materials were obtained by using RM542 marker and Postol1 marker to detect salt and alkali tolerance and low phosphorus tolerance genes, respectively, from the crosses of Changbai 9 ILs（saline-alkali tolerance） and Kasalath ILs（low phosphorus tolerance）. Under the condition of soil pH＞8.5, these materials showed better salt-alkali resistance than the control materials Changbai 9 and Kasalath. Under the condition of soil pH＞8.5 and no P fertilizer application, the phosphorus utilization rate of six polymeric materials was significantly higher than that of the control Changbai 9.