论文部分内容阅读
利用秕粒玉米杂交种6012,选取该测产小区中所有边行自然穗,其中有6个正常果穗和12个秕粒果穗,分别测定每个果穗的穗粒数、穗粒重、百粒重,进一步比较分析产量等性状,结果表明,秕粒对产量、百粒重负面影响极大。将秕粒和正常粒进行室内育苗栽培,测定出苗率,观察苗势。观察记载秕粒籽粒品质、形状、大小等性状及穗上分布特点。秕粒现象产生原因:花粉粒发育不良;花丝生活力退化;胚乳发育不正常;品种自身缺陷;生态环境影响。预防对策:选用良种;合理密植;科学田间管理;拓展遗传基础,加强抗性育种。
With the hybrid corn 6012, all the natural lines in the line were selected, including 6 normal ears and 12 ears of panicle, and the number of spikes per panicle, , Further comparative analysis of yield and other traits, the results show that the grain yield, 100 grain weight negative impact is extremely large. Seed tablets and normal grain for indoor nursery culture, determination of emergence rate, observed seedling. Observe and record the grain quality, shape, size and other traits and spike distribution characteristics.秕 grain phenomenon causes: pollen grains dysplasia; degradation of filament vitality; endosperm development is not normal; varieties of their own defects; ecological environment. Prevention measures: selection of elite; close and reasonable planting; scientific field management; expand genetic basis to strengthen resistance breeding.