豫谷1号和青狗尾草RIL群体根系变异和垂直分布

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1、作物学报ACTAAGRONOMICASINICA2014,40(10):17171724http://zwxb.chinacrops.org/ISSN0496-3490;CODENTSHPA9E-mail:xbzw@chinajournal.net.cnDOI:10.3724/SP.J.1006.2014.01717豫谷1号和青狗尾草RIL群体根系变异和垂直分布1211111张文英智慧柳斌辉王雪征庞昭进李积铭王广才133322,3,李明哲王永芳李伟李海权贾冠清刁现民123河北省农林科学院旱作农业研究所,河北衡水053000;中国农业科学院作物科学研究所,北京100081;

2、河北省农林科学院谷子研究所,河北石家庄050031摘要:根系在谷子生长发育过程中起着极为重要的作用。本试验以豫谷1号和青狗尾草杂交衍生的RIL群体196个家系为材料,采用根管土柱栽培实测根系性状的方法,调查谷子根系性状的变异及在土壤中垂直空间的分布情况。2结果表明,谷子单株根系长度平均为(89.42±32.67)m,单株根系总面积平均为(2.74±0.93)dm,单株根系总体积平均为(30.94±13.93)mL,单株根系根直径平均数为(0.52±0.06)mm,单株根系平均干重为(0.98±0.45)g,除根系直径外,各根系性状在家系间均表现很高的变异系数;单株根量垂直分布

3、分析表明,谷子根深可到2.4m,90%的根量分布在0~200cm范围之内,根量在土壤中整体分布呈“8”型架构;根系性状和地上农艺性状的相关分析表明,单株地上生物量和单株籽粒产量与地下根量呈极显著正相关,是根系选择的间接指标。关键词:谷子;根系;耕层;重组自交系群体PhenotypeVariationandVerticalDistributionofFoxtailMilletRootSysteminRILfromaCrossofYugu1WildGreenFoxtailW53121111ZHANGWen-Ying,ZHIHui,LIUBin-Hui,WANGXue-Zheng

4、,PANGZhao-Jin,LIJi-Ming,WANG113332Guang-Cai,LIMing-Zhe,WANGYong-Fang,LIWei,LIHai-Quan,JIAGuan-Qing,andDIAO2,3,Xian-Min12DrylandFarmingInstitute,HebeiAcademyofAgriculturalandForestryScience,Hengshui053000,China;InstituteofCropScience,Chinese3AcademyofAgriculturalSciences,Beijing100081,China

5、;InstituteofMilletCrops,HebeiAcademyofAgriculturalandForestryScience,Shijia-zhuang050031,ChinaAbstract:Foxtailmilletisawell-knowndroughttolerantcropinaridandsemi-aridregions,becauserootsystemplaysanessen-tialroleincropgrowthperiod.Taking196linesfromfoxtailmilletRIL,derivedfromacrossofcultiv

6、arYugu1wildgreenfox-tailW53asmaterials,weinvestigatedrootsystemvarianceanddistributioninthesoilwiththerootcanalsoilcolumnculture.Theresultsshowedthattheaveragelengthofrootperplant,theaveragerootsurfaceareaperplant,theaveragerootvolumeperplant,2theaveragerootdiameterperplantandthatofrootdry

7、weightperplantwere89.42±32.67m,2.74±0.93dm,30.94±13.93mL,0.52±0.06mm,and0.98±0.45g,respectively.Thereexistedhighvariationcoefficientsintherootcharactersofalllinesexceptrootdiameter.Thedeepestrootsystemwasdetectedin2.4metersbeneaththesoilsurface,and90%ofr