The genomic DNA polymorphism analysis with 521 pairs of SSR(simply sequence repeats) molecular markers indicated CHA-2 derived really from cultivar Texianzhan13 and they were near-isogenic lines.

• 4、变异的微卫星分析和矮生基因的初步定位研究表明：CHA-2确实来源于特籼占13，二者为一对近等基因系；