分子标记在水稻稻瘟病病害系统研究中的应用

 现行水稻品种稻瘟病抗性寿命短已成为水稻生产的主要障碍之一,造成水稻品种稻瘟病抗性容易丧失的主要原因是现时尚未有客观、可靠的技术方法获知育种地区真实的病原菌群体结构及其演化规律,另外,对水稻品种稻瘟病抗性的遗传基础不十分清楚也是其原因之一。本文概述了近几年来分子标记在稻瘟病病原菌群体结构分析和抗病品种抗病遗传分析中的应用,以及抗性基因标记技术的发展,并探讨应用分子标记辅助获得稻瘟病稳定控制的策略及实际应用中的若干问题。

Application of molecular markers to the study of rice blast pathosystem

Rice blast disease is one of the most destructive diseases in rice plant. The short-live of the blast-resistance in rice plant is one of the main constraints in rice production. The easy breakdown of blast resistance for current rice cultivars may be attributed to inadequate techniques and methods in analyzing the pathogen population structure and their evolution, and what we still have not entirely known in the genetic basis of blast resistance in resistant cultivars. In this paper, we review the progress on the application of molecular markers to the analysis of blast pathogen population structure and genetics of blast resistance and on the development of molecular marker techniques in tagging the blast resistance genes. The strategies for sustainable management of blast disease through molecular genetic analysis are discussed. Several problems toward the practical applications in these studies are mentioned at the end of this paper.