Study on the Dynamics of Filament Vigor and Seed Setting of Maize Hybrids

doi:10.11924/j.issn.1000-6850.casb2023-0262

Abstract

Abstract:

The aim was to clarify the dynamic changes of filaments vigor and the setting rate at different day-ages of maize hybrids, and provide a better theoretical basis for maize breeding and production. This study selected maize hybrids ‘Yongyou 1573’ ‘Yongyou 1583’ and ‘Zhengdan 958’ as experimental materials to measure their daily silk production quantity and length, different day-age silk setting rates, and pollination ear traits. The results showed that the daily silking quantity of corn hybrids showed a trend of rapid to slow increase, and the peak of daily silking length was on the second day of silking. As the number of days of silking increases, the dynamic changes of panicle length, panicle diameter, panicle grain weight, and seed setting rate after pollination were basically increasing first and then decreasing. The peak of panicle diameter appeared on the 4th to 5th day of silking, while the peak of panicle length, panicle grain weight, and seed setting rate all appeared on the 6th to 7th day of silking, with differences among varieties; On the 1st to 4th day of silking, the weight of 100 grains pollinated was higher than that of the control, with bald tips and decreasing day by day. The changes in filament vitality and pollination seed setting rate reflected by the research results have certain reference value in both efficient maize breeding and field production, thus achieving the breeding goal of high yield.

Key words: corn, hybrids, silk vitality, soundness, dynamic study

ZHAO Shuzheng, YANG Meili, LU Hongwei, SU Yujie, CHENG Jianmei, WANG Bangtai, QIN Guiwen. Study on the Dynamics of Filament Vigor and Seed Setting of Maize Hybrids[J]. Chinese Agricultural Science Bulletin, 2024, 40(6): 36-41.

Figures/Tables 5

References 28

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