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莫17是目前玉米杂交制种中配合力较强,应用范围较广的自交系,但是,在制种实践中莫17种穗根部往往结实较差,很可能是因为莫17果穗苞叶过长的原因所致。为提高其结实率,提高制种产量,我们于1987年对莫17自交系做了剪苞叶试验。一、试验材料及方法试验材料为莫17×E28。试验方法是在同样栽培管理条件下的制种田内,随机选取60平方米作为试验区。分为剪苞叶区和对照区,各为30平方米,株距30厘米,垄距65厘米,2个处理各为150株,未设重复。在剪苞叶区内,当莫17花丝将要抽出时剪掉果穗苞叶顶部2～3厘米,观察其生育性状及经济性状的变化情况。二、试验结果 1.生育进程剪苞叶区从出苗到抽丝的日数为70天,与对照区相同;从出苗到成熟的生育日数为119天,比对
Mo 17 is the current inbred line with stronger combining ability and wider application range in maize hybrid seed production. However, in the practice of seed production, the 17 ear roots tend to be weaker and harder, which is probably because Mo 17 ear bract Long reason. In order to increase its seed setting rate and improve the seed production, we conducted the cut leaf trials on Mo17 inbred lines in 1987. First, the test materials and methods Test material Mo 17 × E28. The test method is in the same cultivation and management conditions of farming, randomly selected 60 square meters as the test area. Divided into the cuticle area and the control area, each 30 square meters, 30 cm spacing, Ridge distance 65 cm, two of 150 for each treatment, no duplication. Scissors in the leaf area, when Mo 17 filaments to be extracted when cut the top of the ear bract 2 to 3 cm, observe the changes in their fertility and economic traits. Second, the test results 1. Fertility process cuticle area from sprouting to spinning the number of days is 70 days, and the same control area; from emergence to maturity of the number of days of birth is 119 days, compared