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Comprehensive Evaluation on Drought Tolerance of Widely-used Rice Varieties with subordinate function Method

Agricultural Science & Technology 2015年第8期16卷 1643-1647页

作者：刘三雄黎用朝吴俊闵军常硕其刘利成卢向阳邓启云湖南省水稻研究所湖南长沙410125 湖南农业大学湖南长沙410128 农业部长江中下游籼稻遗传育种重点实验室湖南长沙410125 湖南杂交水稻研究中心湖南长沙410125

Using drought-tolerant cultivar IAPAR 9 （upland rice from Brazil） and drought-sensitive varieties IR64 as the controls, the drought tolerances of total 26 rice varieties widely used in production were evaluated with subordinate function method based on morphological, physiological and yield traits. The results showed that the trait values of grain yield per plant （GYP）, effective panicles per plant （EPP）, seed-setting rate （SSR）, panicle length （PL）, leaf relative water content （RWC） and chlorophyll content （SPAD） in all tested varieties decreased significantly under the conditions of drought stress. The subordinate function values of these traits of all tested rice varieties were thus calculated varieties. Based on the aver- age subordinate function values of all these traits, total 7 （i.e. Y Liangyou 1） and 3 （i.e. Liangyou Peijiu） rice varieties were identified as drought-tolerant and drought- sensitive varieties, respectively.

关键词： Rice Drought tolerance subordinate function

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A New Comprehensive Evaluation System for Thermo-Tolerance in Tomato at Different Growth Stage

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Journal of Agricultural Science and Technology(B) 2016年第3期6卷 151-167页

作者： Mintao Sun Fangling Jiang Chuan Zhang Meng Shen Zhen Wu Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in East China Ministry of Agriculture College ofHorticulture Nanjing Agricultural University Nanjing 210095 China

With global warming, heat stress is becoming a more frequent event and a major limiting factor for crop production. The evaluation of thermo-tolerance is essential for the cultivators to obtain the heat resistant genotypes and breeders to improve the thermo-tolerance of plants. Therefore, it is very important to perfect the existing evaluation system for thermo-tolerance. In this study, 30 tomato genotypes were treated with heat stress at germination, seedling and flowering stages. Each index was different and diverse in different tomato genotypes by doing variability analysis, difference analysis and Student＇s t test. Before principal component analysis （PCA）, a positive treatment for the negative and moderation indexes was performed. After correlation analysis, the authors performed PCA （including dimensionality reduction （DR）, no dimensionality reduction （NDR） and optimal index （OI））, combining with subordinate function （SF）, weight and cluster analysis. No matter at germination or seedling stage, the members of the groups were basically identical for DR, NDR and OI. Then 10 tomato genotypes were chosen from 30 randomly for verification. Compared all the evaluation systems, OI was the simplest and also could get as credible results as other methods. Therefore, in this study, OI could be adopted and improve the efficiency during the evaluation. At germination stage, germination power （GP） can accurately evaluate the thermo-tolerance, and at seedling stage, it was fresh weight （FW）, internode length （IL） and dry matter percentage of seedling （DMP）. Finally, all the indexes in the three stages were applied correlation analysis. Seedling stage showed significant positive correlation with flowering stage. In conclusion, this work improves the current system and set up a new comprehensive evaluation method named OI, which also improves the efficiency, guarantees reliability in screening thermo-tolerance of tomato for cultivators and expedites the process of breeding fo

关键词： Tomato thermo-tolerance principal component analysis subordinate function cluster analysis comprehensive evaluation.

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Comprehensive Evaluation of Aluminum Tolerance in Sugarcane Varieties at the Seedling Stage and Screening of Identification Indexes

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Agricultural Biotechnology 2022年第6期11卷 64-70页

作者： Lishun PENG Zhengying CAO Benpeng YANG Wenwei CAI Institute of Tropical Bioscience and Biotechnology Chinese Academy of Tropical Agricultural SciencesHaikou 571101China

[Objectives]Aluminum toxicity is one of the important stress factors affecting sugarcane quality and yield in south China,breeding aluminum tolerant varieties is a cost-effective and practical *** order to explore the characteristics of aluminum toxicity tolerance in different sugarcane varieties and establish the comprehensive evaluation system for screening and breeding new varieties with aluminum toxicity tolerance,this study was conducted to perform comprehensive evaluation of aluminum tolerance in different sugarcane varieties and screening of identification indexes.[Methods]With 26 sugarcane varieties bred in different ecological areas as materials,through a pot experiment,nine indexes which include sugarcane plant height,root length,shoot dry weight,root dry weight,root-shoot ratio,relative chlorophyll content,leaf proline content,and shoot and root aluminum contents at the seedling stage under acid-aluminum stress and control conditions were measured,and the aluminum toxicity tolerance coefficients of various indexes of each variety were *** this basis,the aluminum tolerance of all varieties was comprehensively evaluated by principal component analysis,subordinate function,cluster analysis and stepwise regression analysis.[Results]Compared with the control,the nine indexes showed more abundant variation among the 26 varieties under acid-aluminum *** correlation analysis confirmed that the contributions of the nine measured indexes to aluminum tolerance were significantly overlapped,and the subsequent principal component analysis summarized and combined the ones with strong correlation among the nine indexes,converting them into two new independent comprehensive *** cumulative contribution rate showed that the two new indexes covered 82.448%of the information of the original nine ***,the comprehensive evaluation D values of the acid-aluminum tolerance of the 26 varieties were calculated based on the subordinate function va

关键词： Sugarcane Acid-aluminum tolerance Principal component analysis subordinate function Comprehensive evaluation

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Comprehensive Evaluation on Drought Resistance of Different Flue-cured Tobacco Cultivars in Bijie Tobacco Growing Area

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Agricultural Science & Technology 2015年第6期16卷 1130-1135页

作者：符新妍翟欣陈雪程功李洪臣喻奇伟张小全杨铁钊河南农业大学烟草学院河南郑州450002 贵州省烟草公司毕节地区公司贵州毕节551700 许昌市烟草专卖局河南许昌461000

Based on pot experiments, major agronomic traits, biomass accumulation, leaf water-holding capacity, relative water content, root MDA content, root proline content and other physiological indicators of four different flue-cured tobacco culti-vars under drought stress were investigated, and drought resistance in various flue-cured tobacco cultivars was comprehensively analyzed with subordinate function method, aiming at clarifying the differences in drought resistance among various flue-cured tobacco cultivars. The results indicated that under drought stress, major agronomic traits, fresh and dry mass accumulation, and leaf relative water content of four different flue-cured tobacco cultivars were reduced significantly; the decreas-ing range of Yunyan 87 reached the minimum, fol owed by Bina 1, while Qianxi 1 demonstrated the maximum decreasing range. Leaf water-holding capacity of various flue-cured tobacco cultivars showed a descending order of Yunyan 87 〉 Bina 1 〉Qianxi 1 〉 Jiucaiping 2. MDA content and proline content in roots of various flue-cured tobacco cultivars increased significantly; to be specific, Yunyan 87 and Bina 1 exhibited a slight increase in root MDA content and a significant increase in root proline content, while Jiucaiping 2 and Qianxi 1 showed an opposite trend. Accord-ing to the results of comprehensive analysis with subordinate function method, drought resistance in various flue-cured tobacco cultivars showed a descending or-der of Yunyan 87 〉 Bina 1 〉 Jiucaiping 2 〉 Qianxi 1.

关键词： Flue-cured tobacco Cultivar Drought resistance subordinate function

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