摘要
以10份生育期一致、果皮柔嫩度存在梯度差异的超甜玉米自交系为材料,探讨果皮柔嫩度和果皮主要成分在籽粒发育过程中的动态变化及其相互关系。结果表明,在湖北武汉和海南陵水2种不同环境下,果皮柔嫩度好、中、差的3份自交系PE10、T105、S33205在授粉后第12~24天内,果皮柔嫩度值(打孔读数)均呈由小到大的曲线变化,且各测定时间点的柔嫩度均值均为S33205>T105>PE10;环境条件影响果皮柔嫩度变化速率。在2种环境下的测定时间段内,3份自交系果皮半纤维素含量均逐渐增大,木质素含量呈现单峰曲线变化,而纤维素含量始终在24%上下波动,果胶与灰分含量变化不大,且没有明显的规律,主要成分含量均值始终为半纤维素>纤维素>木质素。无论是在籽粒发育过程中,还是在最适采收期,果皮半纤维素和木质素含量均与果皮柔嫩度呈极显著正相关,是影响果皮柔嫩度的化学成分因子。
Ten inbred lines of super sweet corn with similar growth time and gradient difference in pericarp tenderness were used to study the dynamic change of pericarp tenderness and main constituents and their interrelationship in kernel development in order to understand the influence of the content variation of the main ingredients on pulp tenderness.The results showed that PE10(best tenderness),T105(medial tenderness),and S33205(worst tenderness)of the 10 materials exhibited a curvilinear increase in pericarp tenderness score(puncture reading)from 12 to 24d after pollination in Spring(Wuhan,Hubei)and Winter(Lingshui,Hainan)in 2014.In addition,the mean values of the pericarp tenderness scores at each time point showed the same descending order of S33205,T105 and PE10.The change rate of pericarp tenderness was affected by the environment.The variation in hemicellulose content in the pericarp of three inbred lines showed the gradual increase from small to large during the test,the lignin content varied along a single peak curve,the cellulose content varied by 24%throughout,and the pectin and ash contents changed little and irregular.The average levels of the major constituents of the pericarp were all in descending order of hemicellulose,cellulose,lignin over the test period.Either in the course of grain development or at the most appropriate time of harvest,the levels of hemicellulose and lignin all correlated significantly with pericarp tenderness,which were chemical factors affecting pericarp tenderness.
作者
顾银山
张士龙
贾海涛
李小琴
贺正华
焦春海
田小海
黄益勤
危文亮
Gu Yinshan;Zhang Shilong;Jia Haitao;Li Xiaoqin;He Zhenghua;Jiao Chunhai;Tian Xiaohai;Huang Yiqin;Wei Wenliang(College of Agriculture,Yangtze University,Jingzhou 434025,Hubei,China;South China Agricultural University/State Key Laboratory for Conservation and Utilization of Subtropical Agrobioresources,Guangzhou 510642,Guangdong,China;Institute of Food Crops,Hubei Academy of Agriculture Sciences/Hubei Key Laboratory of Germplasm Innovation and Genetic Improvement of Grain Crops,Wuhan 430064,Hubei,China)
出处
《作物杂志》
北大核心
2022年第3期134-142,共9页
Crops
基金
亚热带农业生物资源保护与利用国家实验室开放课题(SKL-CUSAb-2013-03)
粮食作物种质创新与遗传改良省重点实验室开放课题(2018lzjj07)
湖北省农业科学院青年基金项目(2021NKYJJ03)。
关键词
超甜玉米
果皮柔嫩度
成分含量
动态变化
相互关系
Super sweet corn
Pericarp tenderness
Component content
Dynamic variation
Correlation
