不同熟期玉米杂交种及其亲本子粒脱水速率的比较研究

Comparative Study on Dehydration Rate of Kernel among Maize Hybrids and Parents with Different Maturity Periods

以3个不同熟期玉米杂交种及亲本自交系为试验材料,对子粒脱水速率、子粒含水率和植株相关性状进行测定比较。结果表明,不同熟期玉米材料子粒脱水速率存在显著差异,熟期对子粒脱水速率有明显影响,中晚熟材料的平均脱水速率高于晚熟品种;生理成熟后子粒脱水速率在杂交种父本间差异极显著,母本间无差异,杂交种子粒含水率与亲本自交系呈极显著正相关,子粒生理成熟时含水率的高低影响收获时的含水率;子粒自然脱水速率与穗轴脱水速率呈极显著正相关,与穗长、穗粗、行粒数、子粒长、穗位高、株高均呈显著负相关。

By using 3 different hybrids and their parents with maturity periods of maize to study the dehydration rate of kernel, kernel water content and the correlation between plant characteristics and water content. Results showed that the dehydration rates of maize with different maturity periods were significantly different. Maturity periods had a significant effect on the dehydration rates of kernel. The average dehydration rates of mid-late maturity maize faster than the average dehydration rates of late maturity maize. There was significant difference in dehydration rates among the male parent after physiological maturity. However, there was no difference among female parent. Hybrid water content was significantly positively related with their parents＇ water content. Natural dehydration rate of kernel was very significantly positively related with cob dry-down rate and significantly negatively related with ear length, ear diameter, kernel of row. kernel l^n~h t＋~r h,~i~＇ht ~nA night h,：i^ht