谷子品种抗旱性的苗期快速鉴定  

Rapid Evaluation on Drought Tolerance of Foxtail Millet at Seedling Stage

作　　者：张锦鹏[1] 王茅雁[1] 白云凤[2] 贾晋平[1] 王国英[1] 

机构地区：[1]中国农业大学农业生物技术国家重点实验室,北京100094 [2]山西省农业科学院作物遗传研究所,太原030031

出　　处：《植物遗传资源学报》2005年第1期59-62,共4页Journal of Plant Genetic Resources

基　　金：国家973计划资助项目(2003CB114300)

摘　　要：报道了在苗期快速鉴定谷子品种抗旱性的实验结果。通过比较种子在甘露醇渗透胁迫条件下的相对萌发率和芽生长抑制率、幼苗在适度控水条件下的相对含水量和水势、幼苗严重失水恢复供水后的存活率等几个指标,对5个谷子品种(鲁7060、羊角黄、豫谷5号、Jun24和Mar51)的苗期抗旱性进行鉴定。结果表明,Mar51在所鉴定的品种中具有相对的抗旱优势,可以作为谷子苗期抗旱性研究的代表性材料。谷子种子在甘露醇渗透胁迫条件下的相对萌发率与幼苗在适度控水条件下相对含水量的变化趋势一致,初步认为这两个指标可以作为苗期快速鉴定谷子抗旱性的筛选指标。Five foxtail millet varieties, including Lu 7060, Yangjiaohuang, Yugu No. 5, Jun 24 and Mar 51, were used for rapid drought tolerance evaluation. According to the germination rate in mannitol solution, relative water content (RWC) and water potential of leaves after mid-drought and seedling survival rate after severe drought, the variety Mar 51 was screened as the most drought-tolerant variety among the five varieties. Compared to other varieties, Mar 51 had a higher germination rate and higher relative water content after mid-drought. As a result, germination rate under osmotic stress and RWC could be considered as good indices of drought tolerance and used for rapid evaluation for drought tolerance of foxtail millet.

关 键 词：品种抗旱性 快速鉴定 谷子 苗期 相对含水量 胁迫条件 生长抑制率 变化趋势 筛选指标 两个指标 萌发率 甘露醇 MAR 幼苗 存活率 代表性 渗透 种子 控水 适度 羊 

分 类 号：S515[农业科学—作物学]