PEG-6000对老芒麦种质材料萌发期抗旱性影响的研究  

Effects of PEG on drought resistance of Elymus sibiricus germplasm at germination stage

作　　者：张晨妮[1] 周青平[2] 颜红波[2] 刘文辉[2] 

机构地区：[1]青海大学,青海西宁810016 [2]青海省畜牧兽医科学院草原所,青海西宁810016

出　　处：《草业科学》2010年第1期119-123,共5页Pratacultural Science

基　　金：农业部"青藏高原牧草种质资源保护利用"(70401);农业部"牧草植物种质资源标准化整理;整合及共享"(DNA21007-14);农业部行业专项"人工草地优质牧草生产技术研究与示范"(nyhyzx07-022)

摘　　要：为了解老芒麦Elymus sibiricus种质材料萌发期的抗旱性,选取7份来自不同地区的老芒麦种质材料,在0、50、100、150、200、250和300g/L的聚乙二醇(PEG-6000)的胁迫下,对相对发芽率、发芽势、发芽指数、种子活力、胚根/胚芽值进行综合测定评价,结果表明:高抗旱性老芒麦分别来自新疆昌吉埠康白杨沟的E03、山西五台山的E04和甘肃碌曲玛艾的E07;抗旱性偏弱的材料是山西五台山的E01、新疆伊犁的E02、新疆乌鲁木齐甘沟的E05;山西沁源县的E06的抗旱性最差。老芒麦作为优良的牧草,研究其在PEG-6000胁迫下时的萌发特性的变化,对其优良品种的选育具有重要意义。In order to understand the drought resistance of Elymus sibiricus at germination stage, sev- en germplasm materials were collected at various locations in China. The seeds were treated with PEG-6000 solution at the concentration of 50,100,150 g/L, and the relative germination rate, germi- nation potential, germination index, seed vitality index and shoot/root lengths were evaluated com- prehensively. The results showed that the high tolerant drought-resistance group included Jibukang which came from Changji, Xinjiang （E03） ; Wutaishan of Shanxi （E04） ; Luqumaai of Gansu （E07）. The intermediate drought-resistance group included materials which came from Wutaishan of Shanxi （E01）; Yili Xinjiang （E02）;Gangou Urumchi of Xinjiang （E05）. The sensitive drought resistance material was Qinyuan, Shanxi （E06）. E. sibiricus was studied on the changes of seed germination characters under PEG-6000 resistance as a good pasture, which had the significant meaning for breeding.

关 键 词：抗旱性 老芒麦 发芽特性 PEG-6000 

分 类 号：S543.9[农业科学—作物学]