美国的水稻纹枯病抗病遗传育种研究

STUDIES IN THE U.S. ON GENETICS AND BREEDING OF RESISTANCE TO RICE SHEATH BLIGHT

从抗源的筛选和改造，抗病品种的选育，抗性机理的研究，抗性的遗传分析和分子生物学研究等多个方面，反映了美国近２０多年来抗水稻纹枯病遗传育种研究的进展，分析了取得进展的原因。其中关于主效抗纹枯病基因的发现，主效基因控制部分抗性的遗传假说，以及一些新的育种思路。

Great research progress on genetics and breeding of resistance to rice sheath blight has been made in the U. S. The main progress was shown in the aspects: screen and improvement of disease resistant germplasm, breeding of disease resistant cultivar, methods of inoculation and rating investigation, mechanisms of resistance, and genetical analysis and molecular biology research on resistance. Of the aspects, the finding of major resistant genes, the hypothesis about partial resistance may be controlled by single major genes, and some new thoughts on breeding of resistance are all very valuable for Chinese researchers to develop their research work.