7个谷子杂交种及其亲本的抗旱性分析  

Drought Resistance Analysis of 7 Foxtail Millet Hybrids and Their Parents

作　　者：李会霞[1] 郑植尹 田岗[1] 刘鑫[1] 王玉文[1] 刘红[1] 史关燕[3] LI Huixia;ZHENG Zhiyin;TIAN Gang;LIU Xin;WANG Yuwen;LIU Hong;SHI Guanyan(Millet Research Institute,Shanxi Academy of Agricultural Sciences,Shanxi Changzhi 046000,China;College of Agriculture and Animal Husbandry,Qinghai University,Xining 810016,China;Institute of Industrial Crop,Shanxi Academy of Agricultural Sciences,Shanxi Fenyang 032200,China)

机构地区：[1]山西省农业科学院谷子研究所,山西长治046011 [2]青海大学农牧学院,西宁810016 [3]山西省农业科学院经济作物研究所,山西汾阳032200

出　　处：《中国农业科技导报》2020年第7期20-28,共9页Journal of Agricultural Science and Technology

基　　金：山西省农业科学院育种工程项目(17yzgc026-2,17yzgc026-1);山西省重点研发计划重点项目(201703D211002-6,201703D211008,201803D221019-3);国家谷子高粱产业技术体系(CARS-06-13.5-A23);山西省农业科学院创新项目(YCX2018414,YGC2019KQ01,YCX2019T05)。

摘　　要：培育抗旱品种是降低干旱导致减产的最重要途径。为评价7个谷子杂交种及其亲本的抗旱性,调查并检测谷子植株在拔节期、抽穗前期、盛花期3个时期离土12 h的相对含水量(relative water content,RWC)、根冠比(root top ratio,R/T)、产量的抗旱指数(desiccation index,DI)等指标。结果表明:干旱胁迫条件下,长杂谷466、长杂谷333和17-400在植株离土12 h后不同时期的RWC均值都较高,分别为56.90%、54.52%和54.27%。在干旱胁迫下,17-400、长杂谷333和长杂谷281的R/T平均值较大,分别为0.223、0.218和0.217。杂交种在3个生育时期根冠比(R/T)在干旱胁迫处理与对照处理的差值(D)幅度最小的为长杂谷466,D值平均为0.015,其次是长杂谷281和17-400,D值平均为0.031和0.032;父本的D值幅度基本与其杂交种的D值幅度一致(相关系数为0.8185)。小区产量抗旱指数最高的杂交种为长杂谷466,DI值为1.019,抗旱级别为强,抗旱性级别中等的杂交种有17-400、长杂谷281、长杂谷333。杂交种的抗旱性与父本的抗旱性有一定相关关系。研究结果为抗旱谷子杂交种选育提供一定的理论依据。Breeding for drought-tolerant millet variety is the most important way to alleviate yield reduction caused by drought stress.Drought resistance of 7 millet hybrids and their parents was evaluated by investigating and testing their relative water content(RWC)of plants dug out from the soil after 12 h,and their root top ratio(R/T)in jointing stage,early heading stage and peak flower stage,and their drought resistance index(DI)of yield.The results showed that under drought stress conditions,Changzagu 466,Changzagu 333 and 17-400 had higher average value of RWC after plant leaving soil for 12 h in different growth stages.They were 56.90%,54.52%and 54.27%,respectively.Under drought stress conditions,17-400,Changzagu 333,and Changzagu 281 had higher average value of R/T.They were 0.223,0.218 and 0.217,respectively.Changzagu 466 had the smallest difference value of R/T between treatments of drought stress and CK(D)in three growth stages.The average value of D was 0.015.Changzagu 281 and 17-400 came the second.The average value of D of them were 0.031and 0.032,respectively.The value of D of male parents were basically consistent with their hybrids(correlation coefficient was 0.8185).Changzagu 466 had the highest drought DI.The DI value was 1.019.Moderate drought resistant hybrids were 17-400,Changzagu 281 and Changzagu 333.There was certain correlation between the drought resistance of hybrids and their male parents.These findings provided a theoretical basis and guidance recommendations for breeding of drought-resistant millet hybrids.

关 键 词：谷子 杂交种 保水力 根冠比 抗旱指数 

分 类 号：S515[农业科学—作物学]