428份玉米自交系籽粒脱水速率的比较分析
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国家重点研发计划(2016YFD0100103-10-2);河南省重大科技专项(161100110500)


Investigation of Grain Dehydration Rate in 428 Inbred Maize Inbred Lines
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The National Key Technologies R&D Program of China(2016YFD0100103-10-2);The Major Science and Technology Projects in Henan (161100110500)

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    摘要:

    玉米籽粒的脱水速率是决定收获期籽粒含水量的关键因素。本研究同时在新乡原阳、商丘虞城和周口郸城调查428份玉米自交系在授粉后35~55 d不同时期的籽粒脱水速率及相关农艺性状。结果表明:428份自交系的籽粒脱水速率在三地均表现出丰富的遗传多样性,与穗轴含水量、苞叶含水量呈显著相关,与籽粒含水量呈极显著相关,与穗位高、株高、雄穗分枝数、抽雄期、吐丝期无显著相关,但与苞叶数及生理成熟期的相关性并不明确;在428份玉米自交系中,授粉后35~55 d籽粒脱水速率仅与授粉后35~40 d籽粒脱水速率(生理成熟期前)存在极显著相关,与50~55 d的籽粒脱水速率(生理成熟期后)无显著相关。这表明生理成熟期前的籽粒脱水速率对授粉后35~55 d籽粒脱水速率的影响更为显著。依据生育期、授粉后35~55 d籽粒脱水速率及授粉后55 d的籽粒含水量,共筛选出生育期不同、籽粒含水量低(低于25%)、籽粒脱水速率快(大于1%)的玉米自交系共计42份。

    Abstract:

    The dehydration rate plays a central role in determining moisture content of grain at harvest. In this study, we investigated the grain dehydrate rate (GDR) from 35-55 d after pollination and other correlative traits in 428 maize inbred lines at three locations (Yuanyang, Yucheng, Handan) of Henan province. The results presents GDR shows abundant genetic diversity in three locations, which correlates with the moisture content of cob, bract and significantly relates with grain at 35-55 d after pollination,un-relates with plant height, ear height, tasseling branch, tasseling stage, silking stage. However, the correlation between GDR and physiological mature period and bract number is not clear. In 428 maize inbred lines, GDR at 35-55 d after pollination only significantly correlates with that at 35-40 d after pollination (before physiological maturing period), but, no correlates to GDR at 50-55 d after pollination. This indicates that GDR before physiology maturing period influenced remarkably GDR 35-55 d after pollination as comparison with in other stage. By growth period, grain dehydration rate (>1%) and grain moisture content (<25%) at 55 d after pollination, 42 elite inbred lines with different growth period, low grain moisture content and high grain dehydration rate were identified.

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贾腾蛟,李平芳,王利锋,等.428份玉米自交系籽粒脱水速率的比较分析[J].植物遗传资源学报,2019,20(2):406-411.

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  • 收稿日期:2018-07-20
  • 最后修改日期:2019-01-10
  • 录用日期:2018-08-29
  • 在线发布日期: 2019-03-19
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