爆裂玉米吉爆4号和美爆1号生长发育的研究

通过对爆裂玉米品种吉爆4号和美爆1号的株高,叶片数、植株茎秆和叶片的干物重、籽粒灌浆速度、爆花率、膨胀倍数等性状的研究,结果表明:吉爆4号和美爆1号出苗后41d～69d植株快速增重,茎秆的干物重的变化趋势与植株干物重相类似,呈现"s"型增长趋势.两品种的爆花率在授粉后30～39d增长迅速,以后爆花率增长缓慢;爆花率与膨胀倍数呈极显著正相关.爆裂玉米的籽粒在授粉后15～24d籽粒灌浆速度最快,以后籽粒增重缓慢.

Study on the growth and development of Popcorn Hybrid"Jibao 4"and Popcorn Hybrid"Meibao 1"

The characters of popcorn hybrid "Mibao 1"and popcorn hybrid "Jibao 4",such as plant height,leaf number,dry weight of stem and leaves kernel filling rate,popping percentage and expansion multiple were studied.The result shows that:The plant weight of popcorn hybrid "Mibao 1"and popcorn hybrid "Jibao 4" increase rapidly from 41d to 69d after emergence.The changing trend of stem dry weight is similar with the plant dry weight,which present as "s"-type.The expansion multiples of two varieties increased rapidly from 30d to 39d after pollination,then the trend increased slowly;The popping percentage was very significantly positive correlated with expansion multiple.The kernel filling rate of popcorn from 15d to 24 d after pollination was the highest,then it increased slowly.