Screening cotton cultivars for low-phosphorus tolerance:a comparison of hydroponic and field methods  

作　　者：SUN Miao DONG Helin HAN Huimin FENG Weina SHAO Jingjing HUO Feichao LI Pengcheng ZHENG Cangsong 

机构地区：[1]State Key Laboratory of Cotton Bio-breeding and Integrated Utilization,Institute of Cotton Research of Chinese Academy of Agricultural Sciences,Anyang,Henan 455000,China [2]Xinjiang Union Youmian Technology Service Limited Company,Changji,Xinjiang 831100,China [3]Zhengzhou Research Base,State Key Laboratory of Cotton Biobreeding and Integrated Utilization,School of Agricultural Sciences,Zhengzhou University,Zhengzhou,Henan 450001,China

出　　处：《Journal of Cotton Research》2025年第1期89-101,共13页棉花研究(英文)

基　　金：the Natural Science Foundation of Xinjiang Uygur Autonomous Region(2024D01A56);the National Key Research and Develop-ment Program of China(2017YFD0201906);the Central Research Institutes of Basic Research and the Public Service Special Foundation(1610162022044);the China Agriculture Research System(CARS-15-11);the Agricultural Sci-ence and Technology Innovation Program of Chinese Academy of Agricultural Sciences.

摘　　要：Background Soil available phosphorus(AP)deficiency significantly limits cotton production,particularly in arid and saline-alkaline regions.Screening cotton cultivars for low phosphorus(P)tolerance is crucial for the sustainable development of cotton production.However,the effect of different growth media on the screening outcomes remains unclear.To address this,we evaluated the low P tolerance of 25 cotton cultivars through hydroponic culture at two P levels(0.01 and 0.5 mmol·L^(-1) KH_(2)PO_(4))in 2018 and field culture with two P rates(0 and 90 kg·hm^(-2),in P2O5)in 2019.Results In the hydroponic experiments,principal component analysis(PCA)showed that shoot dry weight(SDW)and P utilization efficiency in shoots(PUES)of cotton seedlings explained over 45%of the genetic variation in P nutri-tion.Cotton cultivars were subjected to comprehensive cluster analysis,utilizing agronomic traits(SDW and PUES)during the seedling stage(hydroponic)and yield and fiber quality traits during the mature stage(in field).These cultivars were grouped into four clusters:resistant,moderately resistant,moderately sensitive,and sensitive.In low P conditions(0.01 mmol·L^(-1) KH_(2)PO_(4) and 4.5 mg·kg^(-1) AP),the low-P-resistant cluster showed significantly smaller reduc-tions in SDW(54%),seed cotton yield(3%),lint yield(-2%),fiber length(-1)%),and fiber strength(-3%)compared with the low-P-sensitive cluster(75%,13%,17%,7%,and 9%,respectively).The increase in PUES(299%)in the resist-ant cluster was also significantly higher than in the sensitive cluster(131%).Four of the eight low-P-tolerant cotton cultivars identified in the field and six in the hydroponic screening overlapped in both screenings.Two cultivars overlapped in both screening in the low-P-sensitive cluster.Conclusion Based on the screenings from both field and hydroponic cultures,ZM-9131,CCRI-79,JM-958,and J-228 were identified as low-P-tolerant cotton cultivars,while JM-169,XM-33B,SCRC-28,and LNM-18 were identified as low P-sensitive cotton cultivars.The relationship

关 键 词：COTTON Hydroponic culture Field culture Low phosphorus tolerance Yield Fiber quality 

分 类 号：S562[农业科学—作物学]