论文部分内容阅读
马铃薯是高产作物之一。马铃薯优良新品种刚推广时,均表现出丰产优质特性。但马铃薯种性很容易退化,一些优良品种往往种植几年便退化了,表现出植株出苗不整齐,生长缓慢,生长势弱,生产期延迟,产量和品质大幅下降等问题。退化的主要原因是马铃薯感染了多种病毒病。这些病毒病严重
Potato is one of the high-yielding crops. When the new potato varieties have just been promoted, they all showed the features of high yield and good quality. However, the potato degeneracy is very easy to degenerate. Some elite varieties often degenerate after planting for several years, showing irregular emergence, slow growth, weak growth potential, delayed production period, and sharp decline in yield and quality. The main reason for the degradation is that the potato is infected with a variety of viral diseases. These viruses are very sick