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掖单12和13号是山东省掖县最新培育的高产玉米杂交种,具有株型好、穗大粒多、品质优良等特点。据初步观察,既可在高密度下种植,又可套播,是两个颇具推广潜力的优良杂交种。我省已有不少地方引入这两个杂交种的亲本组合进行制种。我们于1990年夏播条件下,观察研究了这两个杂交种的三个亲本自交系的生长发育规律及其制种中的几个有关性状,希望能为这两个品种在我省大面积制种提供依据,以保证种子生产的高产优质。材料和方法本研究于1990年夏在豫西农专试验田进
Yedian 12 and 13 are the latest high-yielding maize hybrids cultivated in Yexian County, Shandong Province. They have the characteristics of good plant type, spike large grains and good quality. According to preliminary observations, both high-density planting, but also interception, is quite good potential to promote the two hybrids. Many provinces in our province have introduced seed combinations of the two hybrids. Under the condition of summer sowing in 1990, we studied the growth and development of three parents inbred lines and their related characters in the two hybrids. Seed production to provide the basis for ensuring the high yield and quality of seed production. Materials and Methods The study was carried out in the summer of 1990 in the experimental field of Henan Agricultural College