栽培×野生大豆2个重组自交家系群体种子耐淹性遗传分析-论文.pdf

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1、第32卷第5期大豆科学Vo1．32No．52013在10月SOYBEANSCIENCE0ct．2013栽培×野生大豆2个重组自交家系群体种子耐淹性遗传分析刘瑞君，靖静，李志，王自力，栗旭亮，孔杰杰，盖钧镒，赵团结(南京农业大学大豆研究所／国家大豆改良中心／作物遗传与种质创新国家重点实验室，江苏南京210095)摘要：大豆播种后遭受洪涝灾害会严重影响出苗率，往往导致减产，选育耐淹大豆品种是防灾避害的有效途径。以种子不耐淹水的2个栽培大豆南农493．1、南农86-4分别与耐淹野生大豆PI342618B杂交衍生的NJRISP和NJRINP重组自交家系群体为

2、材料，研究其在72h淹水处理下种子耐淹性的变异与遗传。结果表明：淹水条件下供试群体家系间发芽率存在显著差异，遗传变异大。发芽势、发芽率及豆芽根长、芽长性状有较高的遗传率，且各性状之间呈现高度正相关。主基因+多基因分离分析方法分析发现淹水条件下2个群体大豆发芽势和发芽率遗传符合4对主基因模型(H或I模型)，主基因遗传率达93％以上，多基因效应较低，耐性等位基因来自野生大豆亲本。野生大豆中蕴含优异耐淹基因资源，可为大豆耐涝育种提供优异基因。关键词：大豆；重组自交家系；种子耐淹性；主基因+多基因混合遗传模型；分离分析中图分类号：$565．1文献标识码：A文

3、章编号：1000．9841(2013)05—0581—06GeneticAnalysisofSeedGerminationCharactersunderSubmergenceStressinTwoRecombinantInbredLinePopulationsofGlycinemax×GlycinesojaLIURui-jun，JINGJing，LIZhi，WANGZi—li，LIXu·liang，KONGJie—j，GAIJun-yi，ZHA0Tuan-jie(SoybeanResearchInstituteofNanjingAgricultura

4、lUniversity／NationalCenterforSoybeanImprovement／NationalKeyLaboratoryforCropGeneticsandGermplasmEnhancement，Nanjing210095，China)Abstract：Floodingstressaftersoybeanplantingcancausepoorseedlingstandandconsequentlyyieldreduction．Developmentofsoybeancuhivarswithgoodwaterloggingtole

5、ranceisoneofthemostefectivewaystoreduceproductionloss．Inthepresentpaper，tworecombinantinbredlinepopulations，NJRISPandNJRINP，derivedfromthecrossesbetweentwosensitivecuhivarsNannong493—1．Nannong864andonetolerantwildsoybeanPI342618Bwereusedtorevealthevariationandinheritanceoftheto

6、lerancetoseed—submergenceatgerminationstage．Itshowedthatthereweresignificantdiferencesandhighgeneticvaria—tionintheRIIpopulations．Theheritabilityvaluesofthegerminationrateat3and5daftertreatment，rootlengthandsproutlengthwerehigherthanthoseofotherindicators，andtherewerehighlyposi

7、tivecorrelationsamongthefourtraits．Theresultsfromsegregationanalysisundermajorgenespluspolygenemixedinheritancemodelshowedthattheinheritanceofgerminationrateat3dand5daftertreatmentfittedfourmajorgenesmodel(HorIgeneticmode1)．Thevaluesofmajorgeneheritabilityweremorethan93％，andthe

8、polygene’Swererelativelylow．Allthetolerantalleleswereo