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采用SSR分子标记技术,对广西推广面积较大的45份三系杂交稻组合的Xa-4基因进行了分子检测,结果表明,33份(73.3%)材料含有Xa-4纯合基因,9份(20%)材料含有Xa-4杂合基因。在广西杂交水稻育种中应注意避免抗性基因单一化。
The SSR molecular marker technique was used to detect the molecular Xa-4 gene of 45 lines of three-line hybrid rice in Guangxi. The results showed that 33 (73.3%) of the material contained Xa-4 homozygous gene and 9 (20%) material contains the Xa-4 heterozygous gene. In Guangxi hybrid rice breeding should pay attention to avoid resistance gene homozygosity.