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玉米育种中需要探讨的问题很多,这里讲三个方面的问题,与代表同志们共同讨论。一、对玉米育种工作的估计自六十年代以来,我国玉米自交系间杂交种逐步推广,至1979年全国种植面积达2亿亩,约占玉米播种面积的70％,对粮食增产起了显著作用。据1976年不完全统计,全国推广面积达百万亩以上的杂交种有27个,其中双交种13个,三交种1个,单交种13个,除2个为国外引进外,余均为自育杂交种。这25个自育杂交种除两个亲本未查明外,其他23个的亲本自交系共47个,其中国外系18个,国内自育系29个,占总数的61.7％,有9个杂交种全用自育系组成。反映出我国在玉米杂种优势的研究利用方面取得了可喜的进展和成就。
There are a lot of problems that need to be explored in the breeding of corn. Here are three issues that we should discuss with the delegates. I. Estimation of Maize Breeding Work Since the 1960s, the hybrids between maize inbred lines in China have been gradually popularized. By 1979, the acreage in China reached 200 million mu, accounting for about 70% of the sown area of maize. Significant effect. According to the incomplete statistics in 1976, there were 27 hybrid popula- tions covering an area of over 1 million mu in the country, of which 13 were double-breed, 1 was triple-breed and 13 were single-breed, with the exception of two imported ones All self-breeding hybrids. In addition to the two parents, the 25 self-bred hybrids had 47 inbred lines, of which 18 were foreign and 29 were self-bred, accounting for 61.7% of the total, with 9 Hybrids with self-education system. This shows that our country has made gratifying progress and achievements in the research and utilization of maize heterosis.