作物学报2024，Vol.50Issue(1)：199-208,10.DOI:10.3724/SP.J.1006.2024.34057
基于AHP-隶属函数法的棉花子叶期耐低钾能力鉴定
Identification of cotton low potassium tolerance based on AHP-membership function method at cotyledonary stage
摘要
Abstract
In order to establish a rapid and reliable evaluation system for low-potassium(K)tolerance in cotton,the combination of decision evaluation model AHP and membership function method was used to evaluate the 384 cotton germplasm resources at the cotyledonary stage.The results showed that,under K deficiency(0.03 mmol L-1),the coefficient of variation of the relative area of K deficiency spots on cotyledons was the largest(96.24%),the coefficient of variation of plant dry weight was the smallest(14.73%).This trait of angle between cotyledons and hypocotyls,root length,root surface area,root volume,K+ concentration,and K+ accumulation ranged from 15.72%to 31.52%.The angle between cotyledons and hypocotyl was significantly negatively correlated with the relative area of K deficiency spots.The characteristics of root morphology were positively correlated with plant dry weight and K+ accumulation.According to the evaluation of AHP-membership function method,the comprehensive evaluation C-value of 384 cotton germplasms varied from 0.25 to 0.79.Among which Wujiyizhihua(C-value = 0.7868)had the strongest resistance to low K,and Brazil 014(C-value = 0.2451)had the lowest resistance to low K.The results of systematic clustering showed that the proportions of highly(C-value＞0.74)and moderately(0.33＜C-value＜0.69)low-K tolerant germplasms were 1.30%and 95.31%,respectively;and the proportion of low-potassium-sensitive(C-value＜0.33)germplasms was 3.39%.The correlation between seed K+ concentration and low K tolerance of cotton at cotyledonary stage was not significant difference.In this study,the screening system of low-potassium tolerant germplasm resources of cotton was improved,the cotyledonary stage potassium tolerance of 384 test germplasms was identified,and 5 germplasms with strong potassium tolerance(Wujiyizhihua,Brown 1-61,Black Mountain Cotton 1,Qinli 514,Soviet Cotton 78)were screened,which provided the theoretical and application value.关键词
棉花/子叶缺钾斑/根系/干重/钾含量/隶属函数Key words
cotton/potassium deficiency spots on cotyledons/roots/biomass/potassium content/membership function引用本文复制引用
谭志新,谢留伟,李洪戈,李芳军,田晓莉,李召虎..基于AHP-隶属函数法的棉花子叶期耐低钾能力鉴定[J].作物学报,2024,50(1):199-208,10.基金项目
本研究由国家转基因生物新品种培育重大专项:转基因耐旱耐盐棉花新品种培育基金项目(2016ZX08005-004-008)资助. This study was supported by the National Major Project for Developing New GM Crops:Cultivation of New Varieties of Transgenic Drought-tolerant and Salt-tolerant Cotton(2016ZX08005-004-008). （2016ZX08005-004-008）
