不同成熟度京科968种子活力与种子物理化学特性的关系研究  

Seed Vigor of Maize Hybrid Jingke968 in Different Development Stages and Its Relationship to Seed Physical and Chemical Characteristics

作　　者：顾日良 王永强 杨丽维 成广雷[2] 王建华 GU Ri-liang;WANG Yong-qiang;YANG Li-wei;CHENG Guang-lei;WANG Jian-hua(Center of Seed Science and Technology, College of Agriculture and Biotechnology / Beijing Key Laboratory of Crop Genetics and Breeding / Beijing Innovation Center for Seed Technology（MOA ）, China Agricultural University, Beijing 100193;Maize Research Center, Beo＇ing Academy of Agriculture ＆ Forestry Sciences / Beijing Key Laboratory of Maize DNA Fingerprinting and Molecular Breeding, Beijing 100097, China)

机构地区：[1]中国农业大学农学院种子科学与技术研究中心/北京市作物遗传育种重点实验室,农业部种子全程技术研究北京创新中心,北京100193 [2]北京市农林科学院玉米研究中心/玉米DNA指纹及分子育种北京市重点实验室,北京100097

出　　处：《玉米科学》2018年第3期56-62,共7页Journal of Maize Sciences

摘　　要：以京科968为试验材料,分析授粉后35~62 d的不同成熟度种子的5个物理特性和8个生理生化特性。结果表明,随着收获期的推迟,5个物理特性和蛋白、淀粉、油脂、SOD酶活性逐渐增加,然后达到平台期;糖、MDA、含水量和电导率则随之下降。采用标准发芽率、人工老化发芽率、冷冻发芽率和冷浸发芽率分析不同成熟度种子的活力,结果表明,随收获期推迟,种子活力不断提高,在授粉后59 d时4种评价方法的活力指标均处于最高点,为该品种的最佳收获期。相关性分析发现,种子活力指标与种子物理特性和生理化学特性之间均存在显著相关性,这些指标也有可能用来指示不同成熟度种子的活力。Seed of hybrid maize Jinke968 were harvested from 35 days after pollination（DAP） to 62 DAP, andfive seed physical traits and eight chemical traits were investigated. The result showed that, with the harvest stagepostponing, four chemical traits of protein content, starch content, oil content and SOD activity, and all five physicaltraits of seed length, width, color, volume weight and hundred seed weight increased firstly and then reached a pla-teau; while other four chemical traits（sugar content, moisture content, electricity conductivity and MDA content）showed decrease tendency. Vigor of seed from different maturity were also evaluated by standard germination（SG）,artificial aging test（AG）, cold test germination（CT） and submergence cold test（ST）. All these four seed vigor parame-ters increased from 35 DAP to 59 DAP, and then showed a little decrease at 62 DAP, suggested that the best harvesttime for hybrid line Jingke968 was 59 DAP. Correlation analysis revealed significant correlations between each in-dex of the investigated seed traits.

关 键 词：玉米 京科968 成熟度 种子活力 

分 类 号：S513.01[农业科学—作物学]