摘要
为了探讨玉米生育期的遗传规律，以自交系N6和BT-1为亲本组配了重组自交系（Recombinantinbredline，RIL）群体，利用207个微卫星标记构建分子标记遗传连锁图谱，对生育期相关的抽雄、吐丝和散粉3个性状进行QTL定位，并进行上位性效应分析。结果表明，在第1染色体umcl676-umcl590区域和第2染色体的umcl422-umcl776区域存在共同控制抽雄、吐丝和散粉3个性状的稳定的QTL位点。生育期3个性状QTL的上位性分析，都检测到3对加性×加性上位性互作效应，分别可以解释3．78％～5．43％，1．24％～2．36％和3．27％～4．04％的表型遗传变异。上位性效应是生育期性状的重要遗传基础。
Genetic studies of flowering related traits are important in maize breeding,in this study, a recombi- nant inbred line（RIL）population derived from the cross between N6 and BT-1 was used for flowering related traits evaluation;a genetic linkage map with 207 SSR markers was constructed for quantitative trait loci（QTL） mapping. The results indicated that stable additive QTL conferring flowering related traits,including days to tasseling, days to silking and days to anthesis were identified on chromosomes 1 （ bin 1.05 - 1.06） and 2 （ bin 2.02 ） in two environ- ments. For QTL with epistatic effects,3 pairs of epistatic QTL were detected for days to tasseling,days to silking and days to anthesis,respectively, which can account for 3.78% - 5.43% , 1.24% - 2.36% and 3.27% - 4.04% phenotypic variation. Epistatic QTL are the important genetic basis for flowering related traits in maize.
出处
《华北农学报》
CSCD
北大核心
2010年第2期84-87,共4页
Acta Agriculturae Boreali-Sinica
基金
国家高技术研究发展计划项目("863"计划)(2006AA10Z1D5)
关键词
玉米
生育期
数量性状基因座位
上位性分析
Maize
Flowering related traits
Quantitative trait loci （QTL）
Epistasis interaction
