论文部分内容阅读
选育玉米杂交种,要经过自交分离、测交、组合选配、试验示范,程序多,年限长,从培育自交系开始到育成一个优良品种用于生产,一般需要10年左右。为了缩短育种年限,我国北方一些科研单位或种子部门,多采用南繁的方法。但是南繁路途远,运输不便,人力财力消耗很大。利用温室或塑料大棚就地加代繁殖.成本低,经济效益高。1 选择适宜材料:选用较为早熟的材料,争取加代材料在6月中旬成熟。收获后可进行夏播,秋收后下误适时种麦。
Breeding corn hybrids, to go through self-isolation, cross dating, the combination of matching, pilot demonstration, and more procedures, long years of life, from inbred inbred lines to bred into a good variety for production, generally takes about 10 years. In order to shorten the breeding period, some scientific research units or seed departments in northern China use the method of Nanfan more. However, the road to the south of Fanfan, transport inconvenience, human and financial resources consumed. The use of greenhouses or plastic greenhouses add on-site breeding. Low cost, high economic efficiency. 1 Select the appropriate material: Choose a more precocious material, for the generation of materials in mid-June maturity. Summer sowing can be harvested, autumn harvest after the wrong kind of wheat.