吉林农业大学学报2018，Vol.40Issue(1)：7-16,10.DOI:10.13327/j.jjlau.2018.3586
玉米杂交种及其亲本根伤流强度与地上部生物量的关系
Relationship between Root Bleeding Intensity and Aboveground Biomass of Maize Hybrids and Their Parents
摘要
Abstract
For high yield and high efficiency cultivation of maize and rational utilization of heterosis,the main varieties of Jilin province Xianyu 335,Liangyu 99,Tiannong 9 and their corresponding parents were planted as test materials under the same conditions to analyze the relationship between root bleeding intensity and aboveground biomass of maize hybrids and their parents,sampling and measuring bleeding quantity and biomass respectively at jointing stage,large trumpet stage,silking stage,grain filling stage,milk stage and dough stage.The results show that the hybrids had obvious heterosis in the aboveground biomass,the growth rate of dry weight per plant was the highest at jointing stage,and the growth rate of panicle weight was the highest at grain filling stage.There were significant or extremely significant differences in the biomass of the hybrids and their parents at each stage.The heterosis rates of day and night bleeding intensity had the highest value at dough stage,and the diurnal variation of bleeding intensity was "high in the morning and in the evening and low at noon" at jointing stage,and it decreased as time went on mature stage.The daily bleeding intensity of hybrids and their parents reached the maximum at jointing stage,then decreased rapidly,and then slowly increased to another peak around the grain filhng stage,while nighttime bleeding intensity remained high at silking stage,grain filling stage and milk stage.The biomass and bleeding intensity of the hybrids were significantly higher than those of their parents,and all of them reached significant or extremely significant levels.The correlation between daytime and nighttime bleeding intensity and aboveground biomass showed that there was a positive correlation,and there was a close relationship between the daytime and nighttime bleeding intensity of the parents and the biomass of the aboveground organs at silking stage,filling stage and milk stage,while hybrids were closely related at silking stage.关键词
玉米/伤流强度/地上部生物量/杂交种/亲本/杂种优势Key words
maize/bleeding intensity/aboveground biomass/hybrid/parent/heterosis分类
农业科技引用本文复制引用
何章,夏冬冬,徐晨,刘冰,白子裕,张治安..玉米杂交种及其亲本根伤流强度与地上部生物量的关系[J].吉林农业大学学报,2018,40(1):7-16,10.基金项目
国家自然科学基金项目(31171459),吉林省科技发展计划重大项目(20126033) （31171459）
