CAJ | 학술논문

[目的]为改良玉米雄穗性状．[方法]以雄穗一级分枝数有显著差异的超甜玉米自交系T4和T19为亲本，构建了包含232个单株的F2群体，考察雄穗一级分枝数，利用复合区间作图法进行QTL定位．[结果和结论]结果获得一张包含77个SSR标记的遗传连锁图谱，全长868.7 cM，标记平均间距为11.28 cM，共检测到4个与超甜玉米雄穗一级分枝数相关的QTL位点，分别位于玉米第4、7、8染色体上，可解释5.08％～17.71％的表型变异．主效QTL位点qTBN-4位于第8染色体，可解释17.71％的表型变异．这些QTLs将为雄穗一级分枝数的分子标记辅助选择提供依据．
[목적]위개량옥미웅수성상．[방법]이웅수일급분지수유현저차이적초첨옥미자교계T4화T19위친본，구건료포함232개단주적F2군체，고찰웅수일급분지수，이용복합구간작도법진행QTL정위．[결과화결론]결과획득일장포함77개SSR표기적유전련쇄도보，전장868.7 cM，표기평균간거위11.28 cM，공검측도4개여초첨옥미웅수일급분지수상관적QTL위점，분별위우옥미제4、7、8염색체상，가해석5.08％～17.71％적표형변이．주효QTL위점qTBN-4위우제8염색체，가해석17.71％적표형변이．저사QTLs장위웅수일급분지수적분자표기보조선택제공의거．
[Objective]To improve the tassel of maize .[Method]In this study , a cross between sweet corns inbred T4 and T19, which were significantly different in tassel primary branch number , was de-signed and QTLs for tassel primary branch number were identified in a whole genome with the methods of multiple interval mapping (CIM) based on 232 F2 individuals.[Result and conclusion] A genetic link-age map composing of 77 simple sequence repeat ( SSR) markers covering 868.7 cM with an average in-terval of 11.28 cM was constructed.Four QTLs for tassel primary branch number in chromosome 4, 7, 8 were detected , accounting for 5.08%-17.71%of phenotypic variance .The main QTLs were located on chromosome 8 which accounted for 17.71%of the total phenotypic variance .These QTLs provide the ba-sis of marker-assisted selection for tassel primary branch number .