The parasite population opposing vertical resistance may undergo stepwise development controlled by many genes. 抵抗垂直抗性的寄生物種群可能要經(jīng)歷許多基因控制的步增發(fā)育。
During breeding for vertical resistance, horizontal resistance tends to decline because of negative selection pressure. 當培育垂直抗性時(shí)，由于負的選擇壓力，水平抗性趨于下降。
Host resistance and fungal virulence parallel each other in the cross. 寄生的抗病性的病原菌的毒力在雜交中是勢均力敵的。
Some genes manifested resistance differentiation to specifically races. 某些基因對特定的生理小種表現出抗病性分化。
