论文部分内容阅读
由黄单胞细菌引起的水稻白叶枯病是水稻的三大病害之一,而广谱持久抗病品种的培育是控制该病害最经济有效的措施。本研究利用Xa21的优化功能标记与苗期白叶枯病抗病鉴定,将目前抗谱最广、抗性最强的两个位于同一染色体上的显性基因Xa21与Xa23聚合到杂交稻重要恢复系明恢86,从2138株F2分离后代里,最终得到9株Xa21及Xa23基因的聚合植株。本研究可为紧密连锁的基因聚合提供了新的思路。
Rice bacterial blight caused by Xanthomonas is one of the three major diseases in rice. The cultivation of broad-spectrum persistent disease-resistant cultivars is the most economical and effective measure to control this disease. In this study, Xa21 was used to identify the resistance to bacterial blight in seedling stage, and the two dominant chromosomes, Xa21 and Xa23, which are the most resistant to the most resistant spectrum, were polymerized to reconstruct important hybrid rice Department of Minghui 86, from 2138 F2 segregation progeny, eventually get nine Xa21 and Xa23 gene polymerization plants. This study provides a new way for the close linkage of gene aggregation.