Based on the OsNrt2.1 cDNA sequence of rice (Oryza sativa) cultivar Nipponbare,a nitrate transporter gene OsTNrt2.1 with high similarity with OsNrt2.1 was cloned from TP309,a rice cultivar with high nitrogen use efficiency.

• 根据Nipponbare的OsNrt2.；1cDNA序列；从氮效率较高的水稻品种TP309中克隆了与OsNrt2