To assess the indica-japonica differentiation of improved rice varieties, a total of 512 modern varieties including 301 indica and 211 japonica accessions were analyzed using 36 microsatellites.

• 本文应用36对微卫星标记对包括301份籼稻和211份粳稻在内的512份水稻选育品种进行分析，研究水稻选育品种中的籼粳分化程度。