作物学报 ›› 2010, Vol. 36 ›› Issue (1): 177-183.doi: 10.3724/SP.J.1006.2010.00177
刘新龙1,2,毛钧1,2,陆鑫1,2,马丽1,2,Karen Sarah AITKEN4,Phillip Andrew JACKSON4,蔡青1,3,范源洪1,2,*
LIU Xin-Long1,2,MAO Jun1,2,LU Xin1,2,MA Li1,2,Karen Sarah AITKEN 4,Phillip Andrew JACKSON4,CAI Qing1,3,FAN Yuan-Hong1,2,*
摘要:
采用甘蔗商业品种Co419与野生种割手密Y75/1/2杂交,获得269个单株,组成F1群体,用F102/356与商业品种ROC25回交获得266个单株,组成BC1群体。利用筛选的多态性条带丰富的36对SSR引物和12对AFLP引物,对两个群体进行PCR扩增和分子遗传连锁分析,构建甘蔗分子遗传连锁图谱。用F1群体获得630个分离标记,经c2检测,298个标记为单双剂量标记,占总标记数的47%;用BC1群体获得571个分离标记,有264个标记为单双剂量标记,占总标记数的46%;4个亲本获得单双剂量标记的数量依次为Co419>02/356>Y75/1/2>ROC25。在LOD≥5.0,相邻标记遗传距离≤40 cM的条件下,F1群体有134个单双剂量标记被纳入55个连锁群,其中39个连锁群归属8个同源组,16个未列入,总遗传距离为1 458.3 cM,标记间平均图距为10.9 cM;BC1群体有133个单双剂量标记被纳入47个连锁群,其中34个连锁群归属于8个同源组,13个连锁群未列入,总遗传距离为1 059.6 cM,标记间平均图距为8.0 cM。从4个亲本单双剂量标记进入的连锁群数来看,Co419最多,归入34个连锁群,其次为Y75/1/2,归入20个连锁群,第3为02/356和ROC25,归入19个连锁群。研究结果表明, 从单双剂量标记比例、形成连锁群数量、总遗传距离来看,F1群体构图质量要优于BC1群体。
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