谷子萌芽期对干旱胁迫的响应及抗旱性评价  

Seed Germination Response to Drought Stress and Drought Resistance Evaluation of Foxtail Millet

作　　者：代小冬[1] 杨育峰[1] 朱灿灿[1] 鲁晓民[1] 王春义[1] 杨晓平[1] 杨国红[1] 李君霞[1] 

机构地区：[1]河南省农业科学院粮食作物研究所,河南郑州450002

出　　处：《华北农学报》2015年第4期139-144,共6页Acta Agriculturae Boreali-Sinica

基　　金：农业部/财政部"现代农业产业技术体系专项资金"项目(nycytx13);"十二五"国家科技支撑计划项目(2014BAD07B01);河南省农业科学院自主创新基金项目(2013zz13)

摘　　要：为了探索谷子萌芽期抗旱性相关指标,筛选抗旱谷子品种,采用PEG渗透剂模拟干旱胁迫,测定萌发抗旱指数、活力抗旱指数、相对发芽势、相对发芽率、相对胚芽长和相对胚根长6个指标,对20个谷子品种进行抗旱性鉴定。结果表明:活力抗旱指数、相对发芽率、相对发芽势、相对胚芽长和相对胚根长与萌发抗旱指数呈极显著正相关(相关系数分别为0.867**,0.995**,0.997**,0.762**,0.680**),可以作为谷子萌芽期抗旱性鉴定的指标。其中,相对发芽势和相对发芽率可以作为萌芽期抗旱性鉴定的一级指标;活力抗旱指数可以作为萌芽期抗旱性鉴定的二级指标;相对胚芽长和相对胚根长可以作为萌芽期抗旱性鉴定的三级指标。抗旱性评价结果表明,在20个谷子品种中,长农40、晋中208、长生08-2、汾选446、复12、保200302、郑12、长生08-1这8个品种的萌发抗旱指数分别为0.917 3,0.920 5,0.865 1,0.869 9,0.836 6,0.831 3,0.843 0,0.979 5,抗旱性较好。In order to explore the index of drought resistance and screen drought tolerance varieties,which can provide evidence for millet production and breeding for drought resistance,this study measured sprout index of drought resistance,vigor index of drought resistance,relative germination vigor,relative germination rate,relative plumule length and relative radicle length of twenty millet varieties to evaluate their drought resistance through a-dopting PEG solution simulated soil drought treatment.The results showed that vigor index of drought resistance,rel-ative germination rate,relative germination vigor,relative plumule length and relative radicle length could be consid-ered as the index of drought resistance which were highly significant correlation with sprout index of drought resist-ance （r =0.867 ＊＊ ,0.995 ＊＊ ,0.997 ＊＊ ,0.762 ＊＊ ,0.680 ＊＊ ,respectively）.Analysis showed that,relative germination vigor and relative germination rate could be used for the first indicator of drought resistance identification at millet germination stage;vigor index of drought resistance could be used for the second indicator;relative plumule length and relative radicle length could be used for the third indicator.The sprout index of drought resistance of Changnong 40,Jinzhong 208,Changsheng 08-2,Fenxuan 446,Fu 1 2,Bao 200302,Zheng 1 2 and Changsheng 08-1 were 0.91 7 3, 0.920 5,0.865 1 ,0.869 9,0.836 6,0.831 3,0.843 0 and 0.979 5,respectively,which showed better drought resistance than others in twenty millet varieties.

关 键 词：谷子 萌芽期 干旱胁迫 抗旱性鉴定 

分 类 号：S515.01[农业科学—作物学]