植物营养与肥料学报2024，Vol.30Issue(9)：1718-1730,13.DOI:10.11674/zwyf.2024173
水稻耐酸性综合评价及耐酸种质筛选
Comprehensive evaluation of acid tolerance rice and screening of acid-tolerant germplasm in rice
摘要
Abstract
[Objectives]The comprehensive evaluation and screening system of acid-tolerant rice was established to explore the acid resistance characteristics of rice.[Methods]96 rice varieties were treated with acid and control treatments in a pot experiment.Ten traits including plant height,total root length,aboveground fresh weight,root fresh weight,total fresh weight,aboveground dry weight,root dry weight,root shoot ratio,total root surface area and total root volume were measured at seedling stage.Then,correlation analysis,membership function analysis,descriptive analysis,principal component analysis,cluster analysis and stepwise regression analysis were used to comprehensively evaluate the acid tolerance of rice.The acid tolerance evaluation model of rice was established,and the acid-tolerant rice varieties were screened and verified under acidic soil conditions in the field.[Results]The plant height,total root length and aboveground fresh weight of different rice varieties under acid treatment were significantly lower than those of the control treatment,and the coefficient of variation of each index ranged from 22%to 66%.Through principal component analysis,10 single indicators were converted into 3 independent comprehensive indicators,which represent 88.8%of the original information.Subsequently,the comprehensive evaluation value(D value)of acid tolerance of different rice varieties was clustered,and 96 rice varieties were divided into four groups,which were extremely acid-resistant type,acid-resistant type,intermediate type and sensitive type.The optimal regression equation was constructed by using the D value of different varieties of rice,and the screening system of acid-tolerant rice varieties was established.In addition,the plant height,grain-setting rate and 1000-grain weight of acid-tolerant rice varieties were significantly higher than those of acid-sensitive rice varieties under acidic soil conditions in the field.The average yield of acid-tolerant rice varieties was 3.5 times of acid-sensitive rice varieties.[Conclusions]Rice total fresh weight,total root length,total root volume,plant height and root dry weight can be used as indicators to screen out acid-tolerant rice varieties.关键词
水稻/苗期/酸处理/综合评价Key words
rice/seedling stage/acid treatment/comprehensive evaluation引用本文复制引用
李亮,徐梦强,丁凡,林苡婧,王飞,许卫锋,许飞云..水稻耐酸性综合评价及耐酸种质筛选[J].植物营养与肥料学报,2024,30(9):1718-1730,13.基金项目
国家重点研发计划项目(2022YFD1900705) （2022YFD1900705）
国家自然科学基金项目(42307419). （42307419）
