不同杂种优势群玉米籽粒脱水速率分析
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河北省高等学校科学技术研究重点项目;国家重点研发计划( 2016YFD0101204-3);河北省现代农业技术体系玉米创新团队项目(HBCT2013020204)


Analysis of maize dehydration rate in different heterotic groups
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    摘要:

    研究不同杂种优势群玉米自交系籽粒脱水速率的特性,筛选脱水速率快的自交系,为选育适应机械化作业的玉米杂交种提供借鉴。本试验采用烘干测定173份玉米自交系的籽粒的脱水速率及其相关性状,利用覆盖玉米全基因组的210对SSR标记对实验材料进行全基因组扫描,通过Structure V2.3.4 软件揭示其群体结构。对不同杂种优势群平均籽粒脱水速率进行方差分析,并筛选出各个群中籽粒灌浆速率快的自交系。研究结果如下:籽粒脱水速率在不同自交系间存在显著差异,与苞叶、穗轴及籽粒的含水率等性状间存在显著相关性。试验共筛选到脱水速率大于1%的自交系20个;授粉后40天时籽粒的含水率低于21%的自交系10个。参试自交系分成P、旅大红骨、瑞德、兰卡斯特和塘四平头5个杂种优势群;授粉后40天脱水速率依次是Reid群0.92%、Lancaster群0.85%、旅大红骨群0.82%、混合群0.80%、P群0.76%、塘四平头群0.56%。

    Abstract:

    The objective of this experiment was to study the characteristics of grain dehydrating rate of different heterotic groups and to select the excellent inbred lines with fast grain dehydrating rate, providing the suitable for mechanization of maize hybrids. In this study, 173 maize inbred lines were used as experimental materials. The drying method was used to determine grain dehydration rate, a genome-wide scan was performed on the material by using 210 pairs of SSR markers covering maize genome, and the population structure of these materials was revealed by Structure V2.3.4. The main results were as follows: The clustering analysis showed that these maize inbred lines could be divided into 5 heterotic groups which are PB, LRC, Reid, Lancaster and Tang SPT group, the grain dehydration rate was striking difference in different inbred lines, and it also had significant correlation among husks, cob and grain moisture content; Lancaster has the fastest average dehydration rate (0.92%) 40 days after pollination among them, the others in order was Reid 0.85%, LRC 0.82%, PB 0.76%, TangSPT 0.56%. The grain dehydration rate was striking difference in different inbred lines, and it also had significant correlation among husks, cob and grain moisture content.

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郭晋杰,陈景堂.不同杂种优势群玉米籽粒脱水速率分析[J].植物遗传资源学报,2018,19(1):39-48.

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  • 收稿日期:2017-07-04
  • 最后修改日期:2017-11-13
  • 录用日期:2017-08-22
  • 在线发布日期: 2018-01-23
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