摘要
大田试验设置正常灌水和干旱胁迫处理,于花铃期开始干旱处理,以株高、果枝数等12个农艺性状的平均数为基础,采用综合抗旱系数、模糊隶属函数、主成分分析、关联分析和聚类分析等统计分析方法相结合进行品种抗旱性鉴定和抗旱指标的筛选,为棉花抗旱品种鉴定和棉花生产提供理论依据。12个农艺性状对水分胁迫的敏感程度各异,基于D值、CDC值和WDC值的棉花种质抗旱性分析;通过D值的聚类分析结果,将153份种质资源分为5级,Ⅰ级(强抗旱型)5份、Ⅱ级(抗旱型)35份、Ⅲ级(中抗旱型)56份、Ⅳ级(较敏感型)56份和Ⅴ级(敏感型)1份。供试棉花种质的籽棉产量与D值、CDC值和WDC值均呈极显著正相关。筛选出花铃期抗旱性强的棉花种质有以色列1101,抗旱性弱的品种盐早2号。株高、籽棉产量、单铃重、有效铃数和果枝始节高度可作为棉花种质资源花铃期抗旱性评价的指标。
By identifying the ability of drought resistance and screening indices at flowering and boll setting stage of upland cotton(Gossypium hirsutum L.),this study aimed to provide the materials and a theoretical basis for drought-resistant breeding and cultivation.153 varieties(lines)were planted under normal irrigation and drought stress conditions,while the drought treatment was conducted by using reduced water at flowering and boll setting stage.Several agronomical traits,including means of plant height,lint percentage,single boll weight,the first node of fruit branch,initial internodes of fruiting branch,effective boll number,fruit branch number,cotton seed yield,fiber length(mm),specific breaking length,uniformity and micronaire,were measured.The statistical analysis was conducted by combination with the comprehensive drought coefficient,membership function,principal component analysis,association analysis and clustering analysis.The agronomic traits of upland cotton varieties(lines)represented large variation upon drought stress treatment.The ranks of drought resistance of tested upland cotton varieties(lines)based on D value.According to clustering results of D value,these upland cotton varieties(lines)could be divided into five types.Type 1(Strongly resistant)included 5 cotton varieties,type 2(Resistant)had 35 cotton varieties,type 3(Moderately resistant)had 56 cotton varieties,type 4(Moderately sensitive)had 56 cotton varieties and type 5(Sensitive)had 1 cotton variety.The yield of tested upland cotton varieties(lines)had significant and positive correlation with D(drought resistance comprehensive evaluation)value,CDC(comprehensive drought resistance coefficient)value and WDC(weight drought resistance coefficient)value.Finally,we identified two varieties Israel 1101 and yanzao 2,which were identified as drought resistant and sensitive upland cotton varieties at flowering and boll setting stage,respectively.Plant height,yield,single boll weight,effective boll number and height of the first branch could be used as the identification indices for drought resistance in upland cotton germplasm resources at flowering and boll setting stage.
作者
李海明
刘绍东
张思平
李阳
陈静
马慧娟
沈倩
赵新华
李存东
庞朝友
LI Hai-ming;LIU Shao-dong;ZHANG Si-ping;LI Yang;CHEN Jing;MA Hui-juan;SHEN Qian;ZHAO Xin-hua;LI Cun-dong;PANG Chao-you(Hebei Base of State Key Laboratory of Cotton Biology/ College of Agronomy, Hebei Agricultural University, Baoding 071001;Institute of Cotton Research of Chinese Academy of Agricultural Sciences, Henan Anyang 455000)
出处
《植物遗传资源学报》
CAS
CSCD
北大核心
2019年第3期583-597,共15页
Journal of Plant Genetic Resources
基金
公益性行业(农业)科研专项(201503117)~~
关键词
陆地棉
花铃期
抗旱性
品种筛选
农艺性状
upland cotton
flowering and boll setting stage
drought resistance
varieties screening
agronomic traits
