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 s...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 between field and hydroponic screening results for low-P-tolerant cotton cultivars was strong,although field validation is still required.The low P tolerance of these cultivars was closely associ-ated with SDW and PUES.展开更多
【目的】以新型植物生长调节剂艾氟迪(AFD)为研究对象,探索其对棉花产量形成以及纤维品质的影响,为科学施用AFD提供依据。【方法】设6个不同AFD处理水平,分析不同处理对棉株株高、铃数、铃重、籽棉产量和纤维品质等的影响。【结果】棉...【目的】以新型植物生长调节剂艾氟迪(AFD)为研究对象,探索其对棉花产量形成以及纤维品质的影响,为科学施用AFD提供依据。【方法】设6个不同AFD处理水平,分析不同处理对棉株株高、铃数、铃重、籽棉产量和纤维品质等的影响。【结果】棉株株高与AFD处理水平呈负相关关系;AFD在抑制棉铃脱落率和提高棉铃吐絮率方面效果明显;AFD在处理水平为1 350~1 800 m L·hm-2时,单株铃数和铃重较对照有显著提高,同时获得的籽棉产量较高;不同水平的AFD处理对棉纤维的断裂比强度、马克隆值、断裂伸长率没有显著影响,但高水平的AFD处理对纤维长度和长度整齐度指数有一定的抑制作用。【结论】适宜的AFD处理水平对棉花增产效果显著,且对纤维品质影响较小。探寻AFD对棉花的影响机制,对生产应用具有一定的指导意义。展开更多
基金the Natural Science Foundation of Xinjiang Uygur Autonomous Region(2024D01A56)the National Key Research and Develop-ment Program of China(2017YFD0201906)+2 种基金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.
文摘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 between field and hydroponic screening results for low-P-tolerant cotton cultivars was strong,although field validation is still required.The low P tolerance of these cultivars was closely associ-ated with SDW and PUES.
文摘【目的】以新型植物生长调节剂艾氟迪(AFD)为研究对象,探索其对棉花产量形成以及纤维品质的影响,为科学施用AFD提供依据。【方法】设6个不同AFD处理水平,分析不同处理对棉株株高、铃数、铃重、籽棉产量和纤维品质等的影响。【结果】棉株株高与AFD处理水平呈负相关关系;AFD在抑制棉铃脱落率和提高棉铃吐絮率方面效果明显;AFD在处理水平为1 350~1 800 m L·hm-2时,单株铃数和铃重较对照有显著提高,同时获得的籽棉产量较高;不同水平的AFD处理对棉纤维的断裂比强度、马克隆值、断裂伸长率没有显著影响,但高水平的AFD处理对纤维长度和长度整齐度指数有一定的抑制作用。【结论】适宜的AFD处理水平对棉花增产效果显著,且对纤维品质影响较小。探寻AFD对棉花的影响机制,对生产应用具有一定的指导意义。
