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在越南长期种植的本地水稻品种一般具有良好的抗病性。通过应用PCR技术,对172个越南当地水稻品种携带的抗性基因(Xa4、Xa7)进行筛选检测,发现57个水稻品种携带有Xa4基因,21个品种携带有Xa7基因。同时对含抗性基因的水稻品种可能携带细胞质雄性不育、保持和恢复基因进行检测,结果显示,在携带有Xa4基因的57个水稻品种中,有3个品种携带细胞质雄性不育基因,6个品种携带有保持基因,8个品种携带有恢复基因;在携带有Xa7基因的21个水稻品种中,有3个品种携带保持基因,1个品种携带恢复基因,没有发现携带细胞质雄性不育基因的品种。
Local rice varieties grown in Vietnam for a long time generally have good disease resistance. By using PCR technique, the resistance genes (Xa4 and Xa7) carried by 172 local rice varieties in Vietnam were screened and found that 57 rice cultivars carried Xa4 gene and 21 cultivars carried Xa7 gene. At the same time, the cytoplasmic male sterility, maintainer and restorer genes could be carried in the rice varieties with resistance gene. The results showed that three of the 57 rice cultivars carrying Xa4 gene carried the cytoplasmic male sterility gene 6 Among the 21 rice cultivars carrying Xa7 gene, 3 cultivars carry the maintainer gene and 1 cultivar carries the restorer gene, and none of the cultivars carrying the cytoplasmic male sterility gene Variety.