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骆介勇同志:关于你来信询问在繁殖玉米自交系MO17产生自裂是什么原因及防治措施的问题,现答复如下,供你参考。玉米裂粒现象在我们育种中经常遇到。1978年下野地试验站繁殖的自交系石_4TR裂粒穗在90％以上,84年我院繁殖的SC704亲本717病穗率为48％,单穗裂粒率0.1～35.5％,平均为17.9％,这对自交的繁殖造成很大威胁。对于这个问题,我专门请教过国内几位研究玉米病害的专家,他们认为裂粒不
Comrade Luo Jieyong: As to your letter asking about the causes of self-cleavage of breeding maize inbred line MO17 and the prevention and control measures, the following is the reply for your reference. Corn cracking is often encountered in our breeding. In 1978, the propagating inbred line stone-4TR cleavage spike was more than 90% in the lower field experiment station. In 1984, the rate of spike of 717 was 48% and the rate of single spike was 0.1 ~ 35.5% 17.9%, which is a great threat to self-breeding. For this issue, I specifically consulted several domestic experts on maize disease, they believe that the crack is not