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馬鈴薯在高溫地区的种薯退化,近代多数学者相倡是因为蚜虫媒介的活动使馬鈴薯羣体逐年增加病毒的感染率。李森科院士則认为高溫直接引致馬鈴薯遺传特性的退化。我国馬鈴薯調种試驗結果表明,在长城以南地区的一股条件下,栽培当地第一年留的种薯,就只能获得相当于新調种薯的三分之一的产量,同时90％以上的植株表現显著的皺縮花叶症状。河北省大名县的农民留种經驗証明,在气溫很高的条件下可以通过一年两季播种高畦沟灌的栽培方法来減少种薯退化。我們會經根据这些事实假設,馬鈴薯的退化不决定于病毒感染率的增加,而决定于一定程度的土壤高溫降低了馬鈴薯对花叶病毒的抵抗力,从而使早已潛伏在未退化种薯中的病毒发揮其毒害作用。五年来的系統实驗资料提供出了支持上述假設的有力証据,并指明了若干有待研究的新問題。
Potato in the hot areas of seed pot degradation, the majority of modern scholars advocate is because aphid media activities so that the potato population increased year by year the virus infection rate. Academician Lysenko believes that high temperatures directly lead to the degradation of potato genetic characteristics. The results of potato transfer trials in China show that under the conditions of a region south of the Great Wall, only about one-third of the yield of newly-planted potato can be obtained by cultivating the first-year-retained seed potato in the area, while over 90% The plants showed significant symptoms of crimped mosaic. Farmers in Daming County, Hebei Province, have the experience of remaining seedlings and have proven that they can reduce the degradation of seed pots by sowing high-ditch furrows under high temperature conditions. Based on these facts, we will assume that the degradation of potato is not determined by the increase of virus infection rate, but is determined by the fact that a certain degree of soil temperature lowers the resistance of potato to mosaic virus and thus lurks already in uncultivated seed potato Viruses exert their toxic effects. Five years of systematic experimental data have provided strong evidence in support of the above assumptions and identified a number of new issues to be studied.