APP下载

苗期PEG渗透胁迫条件下花生品种抗旱性的研究

2018-08-14王彩万勇善刘风珍张昆

山东农业科学 2018年6期

王彩 万勇善 刘风珍 张昆

摘要:采用室内水培法,在PEG6000模拟干旱胁迫条件下,对26个花生品种(系)苗期的抗旱性进行研究。测定花生幼苗主茎高、地上生物量、根系生物量、根冠比,统计分析各品种(系)抗旱指数及抗旱相关性状系数,通过聚类分析法、抗旱性等级评价赋分法、标准差系数赋予权重法综合分析各品种苗期抗渗透胁迫的能力。结果表明,苗期抗渗透胁迫性强的品种为远杂9102、冀0212-4、湘花2008和NC6;抗性弱的品种为白沙1016、04D029、台山珍珠、莱芜花皮、02P172与ND119。

关键词:花生;抗旱性;PEG胁迫;水培法;苗期

中图分类号:S565.203.4文献标识号:A文章编号:1001-4942(2018)06-0065-07

Abstract The drought resistance of 26 peanut cultivars at seedling stage was studied under the simulated drought stress condition with PEG6000 in green house by hydroponics. The main stem height, aboveground biomass, root biomass and root cap ratio of peanut seedlings were determined, the statistical analyses on drought-resistant index and coefficient of drought-resistant related traits were conducted, then the osmotic stress resistance at seedling stage of different varieties were comprehensively analyzed through clustering analysis, drought resistance level evaluation assign points method and standard deviation coefficient weighting method. The results showed that the peanut varieties with higher resistance to osmotic stress at seedling stage were Yuanza 9102, Ji 0212-4, Xianghua 2008 and NC6; the varieties with weaker resistance were Baisha 1016, 04D029, Taishanzhenzhu, Laiwuhuapi, 02P172 and ND119.

Keywords Peanut; Drought resistance; PEG osmotic stress; Hydroponics; Seedling stage

花生(Arachis hypogaea L.)是世界上第四大油料作物,我国是世界第一花生生产和消费大国,花生的总产量在全球总产量中占40%、花生的出口总量占全球出口总量的50%、花生的单产比世界平均单产高一倍[1]。干旱、半干旱的丘陵地区是花生的主要种植区,这些地区降雨量少、降雨集中或有季节性干旱,花生在生长的不同时期极易受到不同程度的干旱胁迫。因此,干旱仍然是制约花生产量与质量提高的主要因素,抗旱育种是提高干旱条件下作物产量经济有效的手段[2]。加速花生的抗旱育种,对于克服干旱、风蚀等自然条件对花生栽培的制约,扩大种植范围,提高其生产力,具有重要意义。多年来,国内外学者在抗旱鉴定方面做了大量工作,并从不同角度提出了许多鉴定方法和评价指标[3-5]。如果在种子萌发期或苗期进行抗旱资源筛选或材料的抗旱性初步鉴定,可减少大田工作量,提高鉴定效率。……

登录APP查看全文