SNP molecular marker of dominant genic male sterile line of brassica napus and application of SNP molecular marker

The invention discloses an SNP molecular marker of a dominant genic male sterile line of brassica napus and application of the SNP molecular marker. The molecular marker is located on an A8 chromosomeand has a total length of 1023bp, and the specific nucleotide sequence of the molecular marker is shown as SEQ ID NO. 1. The molecular marker shows two amplification bands in a dominant genic male sterile restorer line of the brassica napus, and the lengths of the amplification bands are 1051bp and 924bp respectively; and the molecular marker shows one amplification band in a dominant genic malesterile temporary maintainer line of the brassica napus, and the length of the amplification band is 1051bp. The molecular marker is utilized to accurately distinguish the dominant genic male sterilerestorer line and the temporary maintainer line of the brassica napus, can be used for identifying the purity of hybrids, and improves breeding accuracy and selection efficiency. 一个甘蓝型油菜显性核不育系的SNP分子标记及其应用，其位于A8染色体上，共1023bp，具体核苷