Characteristics of Grain Filling and High Yield and Early Maturity of Different Genotypes of Maize

doi:10.11924/j.issn.1000-6850.casb18060028

Abstract

Abstract: The aims are to illustrate the differences of yield, maturity and grain filling in different maize genotypes, and to provide a basis for the maturity selection of maize mechanized harvest. Three maize varieties ‘Xindan 68’,‘Xindan 61’and‘Zhengdan 958’were used as the experimental materials, the changes of growth period, quality, fresh weight of kernel, volume and dry weight of kernel were studied. The yield and yield components were compared and analyzed. The results showed that compared with‘Zhengdan 958’, the parent of‘Xindan 68’had earlier maturity, higher starch content and short growth period. The kernel volume of‘Xindan 68’and‘Xindan 61’had not obvious difference. The kernel dry weight of‘Zhengdan 958’ increased steadily after pollination. In 24 days after pollination, the kernel dry weight of‘Xindan 61’and ‘Xindan 68’increased rapidly, while after 24 days, they increased slowly. The yield of‘Xindan 68’was significantly higher than that of‘Zhengdan 958’, the moisture content of‘Xindan 68’and‘Xindan 61’were significantly lower than that of‘Zhengdan 958’. In conclusion,‘Xindan 68’has short growth period, high starch content, quick grain fill at later stages, and thinner ear axis, which indicate that the kernel of‘Xindan 68’ is easy for dehydration and suitable for mechanized harvest.

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