华中农业大学学报2025，Vol.44Issue(5)：69-79,11.DOI:10.13300/j.cnki.hnlkxb.2025.05.007
甘蓝型油菜自然群体苗期镁效率评价及镁高效优异种质筛选
Evaluation of magnesium efficiency in natural populations of oilseed rape at stage of seedling and screening of elite germplasm with high magnesium efficiency
摘要
Abstract
Screening magnesium(Mg)-efficient germplasm of oilseed rape(Brassica napus L.)will provide elite materials for studying molecular mechanism of Mg efficiency in Brassica napus.90 varieties of natural population of B.napus were used to examine 10 traits of the population including the weight of fresh biomass,the weight of dry biomass,the ratio of root to shoot and the accumulation of Mg under low and normal Mg treatments with the two-step screening method of nutrient solution culture at the stage of seed-ling to screen magnesium efficient varieties of B.napus and study the molecular mechanism of magnesium efficiency in B.napus.Correlation analysis,cluster analysis,and comprehensive evaluation analysis methods were used to comprehensively evaluate the magnesium efficiency in 90 varieties and screen magnesium effi-cient varieties.The results showed that there were significant differences in 10 traits of 90 varieties under 2 magnesium treatments,with a coefficient of variation ranging from 14.8%to 82.94%.The coefficient of low-Mg tolerance of 10 traits was significantly positively correlated.90 varieties were divided into four types including high-efficiency and low sensitivity type(14 varieties),high-efficiency and high sensitivity type(21 varieties),low efficiency and high sensitivity type(19 varieties),and low efficiency and low sensitivity type(36 varieties)based on the weight of dry biomass and the coefficient of magnesium efficiency under normal magnesium conditions as the main indexes for evaluation.The magnesium efficient varieties includ-ing W16 and W100 and magnesium inefficient varieties including W61 and W132 of B.napus were finally screened out through re-screening verification,which can provide materials for subsequent studies on the molecular mechanism of high magnesium efficiency in B.napus.关键词
甘蓝型油菜/镁/苗期/耐低镁系数/镁高效品种Key words
oilseed rape(Brassica napus L.)/magnesium(Mg)/at the stage of seedling/coefficient of low-Mg tolerance/Mg-efficient variety分类
农业科技引用本文复制引用
徐文英,刘良,张昆,张海伟,肖青亮,吴可天,杨广哲,赵尊康..甘蓝型油菜自然群体苗期镁效率评价及镁高效优异种质筛选[J].华中农业大学学报,2025,44(5):69-79,11.基金项目
国家自然科学基金项目(32360800) （32360800）
