作物抗病品種之培育

Abstract

寄主植物與病原能共存於自然界，顯示兩者有共同演化關係。當病原之致病性改變後，寄主隨之改變其抗病性方能均衡，反之亦然。因而抗病性與致病性能夠維持在動態平衡下，寄主與病原亦得以存活。抗病性與致病性之間逐步演化關係，可用基因對基因理念加以說明，其定義為寄主具某一抗病基因時病原必有一致病基因相對應，反之亦然。 The coexistence of host plants and their pathogens side by side in nature indicates that the two have evolving together. Changes in the virulence of the pathogens must be continually balanced by changes in the resistence of the host, and vice versa, so that a dynamic equilibrium of resistence and virulence is maintained and both host and pathogen survive.