陆地棉种质资源材料的耐热性评价及指标筛选  

Evaluation and index screening of heat resistanceof Gossypium hirsutum germplasm resources

作　　者：王朋[1] 郑凯[1] 赵杰银 高文举 龙遗磊 陈全家[1] 曲延英[1] WANG Peng;ZHENG Kai;ZHAO Jieyin;GAO Wenju;LONG Yilei;CHEN Quanjia;QU Yanying(Engineering Research Centre of Cotton,Ministry of Education/College of Agronomy,Xinjiang Agricultural University,Urumqi 830052,China)

机构地区：[1]新疆农业大学农学院/棉花教育部工程研究中心,乌鲁木齐830052

出　　处：《新疆农业科学》2023年第9期2081-2090,共10页Xinjiang Agricultural Sciences

基　　金：新疆维吾尔自治区重大专项(2021A02001-4,2020A01002-2)。

摘　　要：【目的】评价陆地棉种质资源材料的耐热性及筛选指标,为选育耐热性棉花品种及研究耐热性机理提供参考依据。【方法】基于2年试验,选用24份棉花种质资源,随机区组设计,测定相关指标,综合评价24份陆地棉种质资源材料的耐热性。【结果】24份陆地棉资源材料可分为3类。其中第一类为耐热材料,第二类为中间型材料,第三类为敏热型材料,建立陆地棉耐热性的评价模型:D=-0.111+0.175X 2+0.470X 3+1.211X 4(R^(2)=0.9148),建立的最优回归方程可以预测陆地棉材料的耐热性。籽棉产量、单铃重和皮棉产量可作为棉花大田耐热的评价指标,而株高和衣分与耐热性无关。【结论】筛选出4份耐热陆地棉资源材料,建立了以籽棉产量、单铃重和皮棉产量作为陆地棉大田耐热性的评价指标,以过氧化物酶、丙二醛和叶绿素含量作为室内耐热性的评价指标。【Objective】This study first comprehensively evaluated the heat resistance of 24 Gossypium hirsutum germplasm resources.【Methods】Based on the two-year comprehensive evaluation of heat resistance D value cluster analysis.Selecting 24 cotton germplasm materials.Randomized block design.Measurement of relevant indicators.【Results】It was found that 24 Gossypium hirsutum resource materials could be divided into 3 categories.The first category was heat-resistant materials,the second category was intermediate-type materials,and the third category was heat-sensitive materials.An evaluation model for the heat resistance of Gossypium hirsutum was established through a stepwise regression equation:D=-0.111+0.175X 2+0.470X 3+1.211X 4(R^(2)=0.914,8).According to the established optimal regression equation,the heat resistance of Gossypium hirsutum materials,the comprehensive evaluation indexes of cotton heat resistance were established.Correlation analysis and difference analysis found that seed cotton yield,boll weight and lint yield could be used as evaluation indicators of cotton field heat resistance,while plant height and lint had nothing to do with heat resistance.【Conclusion】In this study,four heat-resistant Gossypium hirsutum resource materials were selected,and the seed cotton yield,boll weight and lint yield were established as the indicators for evaluating the field heat resistance of Gossypium hirsutum,and the peroxidase,malondialdehyde and chlorophyll content were used indoors.The index of heat resistance evaluation provides a reference for the rapid breeding of heat-resistant cotton varieties and the research of cotton heat-resistant mechanism.

关 键 词：陆地棉 耐热性评价 聚类分析 相关性 耐热指标 

分 类 号：S562[农业科学—作物学]