目前,对作物多抗性的认识,尚有争异。即使是开展多抗性研究较早的国家也是如此。L.S.Bird认为:多抗性就是提高生物学的广谱效应,目的在于减少控制灾害的栽培管理工作,而获得较高的收益。其多抗性包含病、抗虫和抗逆性。他把抗性描述为延缓寄主死亡的抗性、局部抗性、中等抗性和一般抗性及高抗。而W.P.Sa penfield认为,抗病育种本身在概念上含有下列三科意义或其中之一,即单一抗性、多抗性和对多种灾害的抗性。目的在于培育出抗耐毁坏性病害的优良品种。而实际上,病害、虫害及自然灾害的种类繁多,多抗性的概念以及如何实现“多抗”目标还是人们正在研究的课题。解决棉花病害、虫害或其对不适宜环境的抗性,在当前都是十分紧迫的任务。因为病虫害对当 At present, there is still some controversy over the understanding of crop resistance. This is true even in countries with earlier studies of multi-resistance. L.S.Bird argues that multi-resistance is a broad-spectrum effect that enhances biology, with the goal of reducing cultivation and management of disasters and gaining higher returns. Its multi-resistance includes disease, insect resistance and resistance. He described resistance as a delay in host death resistance, local resistance, moderate resistance, and general resistance and high resistance. W.P. Sappenfield believes that disease-resistant breeding itself conceptually contains one or three of the following three meanings, namely single resistance, multiple resistance and resistance to multiple disasters. The goal is to develop good varieties resistant to destructive diseases. In fact, the variety of diseases, insect pests and natural disasters, the concept of multi-resistance and how to achieve the goal of “multi-resistance” are still the topics people are studying. Addressing cotton diseases, insect pests or their resistance to unfriendly environments is a very pressing task for the moment. Because of pests and diseases right