亚麻萌发期耐盐鉴定体系优化及150份种质耐盐性综合评价  

Optimization of Salt Tolerance Identification System at Germination Stage of Flax and Comprehensive Assessment of Salt Tolerance of 150 Germplasms

作　　者：李枭 郭栋良[1] 李恭泽 薛敏 江海霞[1] 叶佳丽 谢丽琼[1] LI Xiao;GUO Dongliang;LI Gongze;XUE Min;JIANG Haixia;YE Jiali;XIE Liqiong(College of Life Science and Technology,Xinjiang University,Urumqi 830046,China)

机构地区：[1]新疆大学生命科学与技术学院,乌鲁木齐830046

出　　处：《新疆农业科学》2022年第6期1438-1449,共12页Xinjiang Agricultural Sciences

基　　金：新疆维吾尔自治区资源平台项目(PT1808);国家自然科学基金(31160056/C020408)。

摘　　要：【目的】优化亚麻萌发期耐盐鉴定体系并综合评价种质资源耐盐性,为亚麻种质资源耐盐性评价及耐盐品种培育奠定基础。【方法】选用芽长、根长和发芽率作为亚麻萌发期耐盐性鉴定的表型性状。利用13个NaCl浓度梯度胁迫处理30份亚麻种质,分析不同指标变化确定胁迫浓度。用确定的浓度对150份亚麻种质进行胁迫,分别统计相对芽长、相对根长和相对发芽率,利用隶属函数法对供试亚麻萌发期耐盐性进行综合评价,结合聚类分析划分耐盐等级。【结果】以相对芽长或相对根长为指标时适宜的NaCl胁迫浓度为100 mmol/L,以相对发芽率为指标时适宜的NaCl胁迫浓度为220 mmol/L;150份亚麻种质分划为5个耐盐等级:高耐3份、耐盐36份、中耐67份、敏感33份、高敏11份;油用亚麻亚群中各指标均显著高于纤维亚麻和兼用亚麻。【结论】不同耐盐指标的最适筛选浓度不同。筛选出的3份高耐亚麻种质可用于亚麻耐盐育种及后续研究。油用亚麻相比兼用和纤用亚麻更耐盐。【Objective】This study aims to optimize flax germination salt tolerance identification system and the comprehensive evaluation of germplasm resources of salt resistance,salt resistance for flax germplasm resources evaluation and salt-tolerant varieties to lay the relevant foundation.【Method】This study selects the shoot long,root length and germination rate as flax germination salt resistance identification of phenotypic traits.Firstly,30 flax germplasm were treated with 13 NaCl concentration gradients,and the stress concentration was determined by analyzing the changes of different indexes.Then,150 flax germplasm were stressed with the determined concentration,and the relative shoot length,relative root length and relative germination rate were counted respectively.The salt tolerance of tested flax in germination stage was comprehensively evaluated by membership function method,and the salt tolerance grade was divided by cluster analysis.【Result】The appropriate NaCl concentration is 100 mmol/L when the relative shoot length or relative root length is taken as the index,and 220 mmol/L when the relative germination rate is taken as the index;the 150 flax germplasm were divided into five salt tolerance grades:3 high-tolerance,36 tolerance,67 moderate-tolerance,33 sensitivity and 11 high-sensitivity;all indexes of oil flax subgroup were significantly higher than those of fiber flax and dual-purpose flax.【Conclusion】The optimum screening concentration of different salt tolerance indexes is different.Three selected flax germplasm with high tolerance can be used for salt tolerance breeding and follow-up research.Oil flax is more salt-tolerant than dual-purpose flax and fiber flax.

关 键 词：亚麻 萌发期 耐盐性 浓度筛选 综合评价 

分 类 号：S563.2[农业科学—作物学]