利用SSR标记对新疆主栽玉米杂交种SC704及其亲本的遗传变异检测

玉米杂交种SC704多年来一直是新疆玉米生产的主栽品种。为了评估不同地区品种的遗传变异程度，本研究利用SSR标记时来自全疆各玉米主要生产地的SC704及其亲本共46份材料分别进行了检测。结果表明，父本ZPL717中存在一定程度的杂合、变异等现象，而大部分母本ZPL773和杂交种的遗传一致性较好，但存在个别疑似混杂的材料。另外，在SSR扩增位点中，ZPL773与B73有94％一致，而ZPL717与M017之间只有41％是一致的。自然变异的累积和天然异交可能是导致SC704及其亲本遗传变异的主要原因。

Genetic Variation of Maize Hybrid SC704 and Its Parents Grown in Xinjiang Revealed by SSR Markers

SC704 is the major maize variety in Xinjiang over the years.To evaluate the genetic variation of the variety from different regions,total 46 accessions(including SC704 and parents ZPL773,ZPL717) come from several major maize production regions in Xinjiang was identified by SSR markers.The results showed that heterozygosis and variation at some loci were detected in part ZPL717 accessions.Higher genetic uniformity was showed in most ZPL773 and SC704 accessions respectively,but separate heterogeneous accessions were detected.Additionally,94% of SSR loci are same between ZPL773 and B73,and only 41% are same between ZPL717 and Mo17 in this study.Interbreeding and natural mutation accumulation may be major factors in genetic variation among the hybrid and parents.