Differences in Ear Traits of Maize Varieties from Different Eras and Their Effects on Grain Dehydration Rate
Five main maize hybrids from the 1970s to the 2010s in China were used as experimental materials to analyze the changes of ear traits,and determine the effects of these ear traits on the rate of grain dehydration.The results showed that with hybrids replacement,the area,thickness and number of layers of bracts decreased,the fluffy degree of bract increased,grain length increased significantly,grain thickness decreased slightly,ear-pedicel length and row number decreased,but the cob thickness,ear-pedicel length,rows per ear and ear diameter did not change significantly.The rate of grain dehydration increased before and after physiological maturation.Bract area,ear-pedicel length,grain length,ear thickness,rows per ear were the main factors influencing the rate of grain dehy-dration before physiological maturation,and bract area,bract thickness,ear-pedicel length,grain length,ear length and ear thickness were the main factors influencing the rate of grain dehydration after physiological maturation.The results of correlation analysis showed that bract area,cob thickness,ear-pedicel length and ear length were signifi-cantly negatively correlated with the rate of grain dehydration before and after physiological maturity,the results in-dicated that smaller and thinner bracts with fewer layers,thin cob,short ear-pedicel and shorter and thinner ear were beneficial to grain dehydration.
MaizeHybrids of different erasEar traitGrain dehydration rate
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万方数据
