水稻种质资源苗期耐盐性鉴定  

Identification and Screening of Salt Tolerance in Rice Germplasm Resources at Seedling Stage

作　　者：袁杰 王学强[1] 张燕红 赵志强[2] 贾春平[2] 王奉斌[2] 李自超[1] Yuan Jie;Wang Xueqiang;Zhang Yanhong;Zhao Zhiqiang;Jia Chunping;Wang Fengbin;Li Zichao(College of Agronomy and Biotechnology,China Agricultural University,Beijing,100193;Institute of Nuclear and Biological Technologies,Xinjiang Academy of Agricultural Sciences,Urumqi,830091)

机构地区：[1]中国农业大学农学与生物技术学院,北京100193 [2]新疆农业科学院核技术生物技术研究所,乌鲁木齐830091

出　　处：《分子植物育种》2020年第20期6808-6814,共7页Molecular Plant Breeding

基　　金：新疆维吾尔自治区科技支疆项目(2019E0246)资助。

摘　　要：本研究以来自世界各地非常具有代表性的409份栽培稻种质资源为材料,对其进行了苗期耐盐性鉴定。通过比较对照和盐胁迫之后苗长、苗重、根长和根重表型之间的差异以及盐胁迫后依据水稻死叶率对水稻的耐盐等级的鉴定。结果表明,90%左右的种质资源经过盐胁迫处理后苗长、苗重、根长和根重都显著的降低。主成分分析结果中将这些材料分为籼稻(292种材料)和粳稻(117种材料) 2个主要亚种,两个亚种之间的表型不存在显著差异。根据盐处理之后水稻死叶率的调查鉴定,筛选了7份高耐盐种质材料和167份耐盐种质材料,可以为后续研究水稻苗期耐盐机理和耐盐新品种培育提供优异的种质资源。A total of 409 cultivated rice germplasm resources from all over the world were used as materials to identify salt tolerance in seedling stage. By comparing the differences of shoot length, shoot weight, root length and root weight between control and salt stress, and the salt tolerance level of rice based on rice dead leaf rate after salt stress.The results showed that the shoot length, shoot weight, root length and root weight of about 90% of the cultivated rice were significantly reduced after salt stress treatment. The results of principal component analysis showed that, these materials were divided into two main subpopulations, indica(292 materials) and japonica(117 materials). There was no significant difference in phenotypes between the two subpopulations. According to the investigation and identification of the dead leaf rate of rice after salt treatment, seven high salt tolerant germplasm materials and 167 salttolerant germplasm materials were screened, which can provide excellent germplasm resources for the subsequent study of salt tolerance mechanism in rice seedlings and cultivation of new salt-tolerant varieties.

关 键 词：水稻(Oryza sativa L.) 苗期耐盐性 群体结构 耐盐评价 

分 类 号：S511[农业科学—作物学]