干旱区研究2017，Vol.34Issue(5)：1083-1092,10.DOI:10.13866/j.azr.2017.05.17
胡麻种质资源成株期抗旱性综合评价及其指标筛选
Comprehensive Valuation and Screening of Drought Resistance of Flax Germplasms
摘要
Abstract
The main purpose of this paper was to study the drought resistance of flax germplasms,important flax traits,comprehensive evaluating methods of drought resistance and evaluation indexes of flax,and offer some references to drought-resistant breeding of flax and excavate and utilize the drought-resistant germplasm gene resources.Based on the established comprehensive evaluation system of drought resistant by 15 major flax cultivars at the early time,the 227 germplasms,bred varieties and local varieties of flax at home and abroad were taken as the test materials to measure five main agronomic traits and yield index at adult-plant stage under the conditions of both irrigation and natural rainfall.Drought resistance index,factor analysis,subordinate function coefficients,clustering analysis and grey relational analysis were used to evaluate the drought tolerance of tested flax germplasms,classify the drought-resistant types and screen the evaluating indexes.The reaction degree and the correlation degree of tested traits and indexes to drought stress were different.Yield and important traits relevant to yield closely associated with drought resistance could be used as the priority indicators of drought resistance evaluation.There was a significantly positive correlation between D value of tested flax germplasms and yield index (Y value).According to the clustering analysis of D value,the tested flax germplasms were divided into seven levels of drought resistance.The result could better reflect the drought resistance of tested flax germplasms.The comprehensive evaluating method of drought resistance could be used to exactly evaluate and predict the drought resistance and drought-resistant types of flax germplasms and to screen the evaluating indexes.As the main evaluating index in drought resistance evaluation,D value could be used to exactly carry out the comprehensive evaluation of tested flax germplasms by measuring the selected six main agronomic trait indexes closely related to D value.关键词
胡麻/农艺性状/抗旱性/综合评价/隶属函数/度量值/聚类分析Key words
flax/agronomic trait/drought resistance/comprehensive evaluation/subordinate function coefficient/fuzzy clustering dendrogram/clustering analysis引用本文复制引用
欧巧明,叶春雷,李进京,陈军,崔文娟,王立光,罗俊杰..胡麻种质资源成株期抗旱性综合评价及其指标筛选[J].干旱区研究,2017,34(5):1083-1092,10.基金项目
由国家现代农业产业体系胡麻技术体系(CARS-17-SYZ-6)兰州综合试验站 （CARS-17-SYZ-6）
甘肃省农业科学院“现代农业生物技术集成与应用”科研创新团队(2015GAAS02) （2015GAAS02）
甘肃省农业科学院农业科技创新重大专项(2016GAAS59)资助 （2016GAAS59）
