CAJ | 학술논문

利用抗旱性强的冬小麦品种“陇鉴19”（较低叶绿素含量（SPAD ））与水地高产品种“Q9086”（较高SPAD ）杂交构建的F8重组近交系（RILs ）群体120个株系及其亲本为供试材料，研究雨养和正常灌溉条件下，不同地点花后旗叶SPAD与千粒重（TGW ）相关性及数量遗传特点，评价该群体目标性状遗传变异。结果表明：在不同处理条件下，小麦RILs群体旗叶SPAD和TGW表型变异广泛，多样性指数高，且有超亲分离，存在显著的基因型和水分条件以及基因型×水分条件互作效应。小麦RILs群体花后不同发育时期旗叶SPAD和TGW之间均呈现显著的正相关，其中灌浆期旗叶SPAD （SPADg ）与TGW相关性更高（ r＝0．59**～0．69**）。SPADg对TGW有极显著的正向直接作用，而开花期SPAD （SPADf ）相反。干旱胁迫条件下旗叶SPAD对TGW总效应显著高于正常灌溉，SPADg对TGW总效应显著高于SPADf。不同处理旗叶SPAD和TGW遗传力普遍较低（hB2＝0．15～0．44）；在干旱胁迫和正常灌溉条件下，控制SPADf的基因对数分别为22～36和50～59，控制SPADg 的基因对数分别为24～25和31～33，控制TGW的平均基因对数分别为10～11和13～14。该小麦群体花后旗叶SPAD和TGW表型，及其对水分敏感程度变异丰富，适合进行小麦抗旱性状数量遗传研究。
이용항한성강적동소맥품충“롱감19”（교저협록소함량（SPAD ））여수지고산품충“Q9086”（교고SPAD ）잡교구건적F8중조근교계（RILs ）군체120개주계급기친본위공시재료，연구우양화정상관개조건하，불동지점화후기협SPAD여천립중（TGW ）상관성급수량유전특점，평개해군체목표성상유전변이。결과표명：재불동처리조건하，소맥RILs군체기협SPAD화TGW표형변이엄범，다양성지수고，차유초친분리，존재현저적기인형화수분조건이급기인형×수분조건호작효응。소맥RILs군체화후불동발육시기기협SPAD화TGW지간균정현현저적정상관，기중관장기기협SPAD （SPADg ）여TGW상관성경고（ r＝0．59**～0．69**）。SPADg대TGW유겁현저적정향직접작용，이개화기SPAD （SPADf ）상반。간한협박조건하기협SPAD대TGW총효응현저고우정상관개，SPADg대TGW총효응현저고우SPADf。불동처리기협SPAD화TGW유전력보편교저（hB2＝0．15～0．44）；재간한협박화정상관개조건하，공제SPADf적기인대수분별위22～36화50～59，공제SPADg 적기인대수분별위24～25화31～33，공제TGW적평균기인대수분별위10～11화13～14。해소맥군체화후기협SPAD화TGW표형，급기대수분민감정도변이봉부，괄합진행소맥항한성상수량유전연구。
To investigate the quantitative genetical characteristics of SPAD of flag leaf after flowering at different sites and its correlation analysis with thousand-grain weight (TGW) ,a 120 recombinant inbred lines (RILs) derived from two Chinese winter wheat cultivars were used .The recipient parent Longjian 19 had strong drought resistance with lower chlorophyll content (SPAD ) ,while the donor Q9086 showed contrasting traits .The results indicated the interaction between water and genotype .There was significantly positive correlation between SPAD of flag leaf and TGW after flower-ing ,while higher correlation ( r=0 .59* * ~0 .69* *) was detected between TGW and SPAD of flag leaf (SPADg ) dur-ing filling stage .The SPADg showed significantly positive effect on TGW ,while that of flag leaf (SPADf ) during flowering stage was opposite .Gross effect of SPAD to TGW in drought stress was significantly higher than those in normal irrigation condition ,and gross effect of SPADg to TGW was higher than SPADf .Heritability of SPAD of flag leaf and TGW were generally lower (hB2=0 .15~0 .44) under different treatments .The number of genes controlling SPADf were 22~36 <br> and 50~59 ,and those controlling SPADg were 24~25 and 31~33 ,while those controlling TGW were 10~11 and 13~14 under drought stress and normal irrigation condition ,respectively .The result indicates the feasibility of using this RILs population in genetical study of wheat drought resistance .