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粤标5号是应用分子标记技术育成的抗病优质水稻新品种,应用水稻12条染色体的237对SSR标记对该品种的遗传背景进行分析,结果发现:93个标记在亲本间有明显的多态性,多态性比例为39.2%;在各染色体上,基因型来自轮回亲本的比例为30.0%~100.0%,来自供体亲本的比例为0.0~70.0%;除染色体1和9外,该品种在其它染色体上均与轮回亲本存在不同程度的差异位点,背景回复率为83.3%,低于理论回复率。此外,对粤标5号的农艺性状分析表明,该品种有多个性状介于双亲之间,但在每穗粒数、结实率、千粒重、粒型等与轮回亲本存在极显著差异。研究结果将为水稻抗病分子育种提供参考依据。
Yuebiao 5 was a new high-quality resistant rice variety developed by molecular marker technology. The genetic background of this variety was analyzed using 237 pairs of SSR markers on 12 chromosomes of rice. The results showed that 93 markers were significantly more The percentage of polymorphism was 39.2%. On each chromosome, genotypes were from 30.0% to 100.0% of the recurrent parents and from 0.0 to 70.0% from the donor’s parents. In addition to chromosomes 1 and 9, Varieties on the other chromosomes were different with the recurrent parental locus, the background recovery rate was 83.3%, lower than the theoretical recovery rate. In addition, the analysis of agronomic trait of Yuebiao 5 showed that there were many traits between parents in the variety, but there were extremely significant differences in grain number per spike, seed setting rate, 1000-grain weight and grain type with the recurrent parents. The results will provide a reference for resistance molecular breeding in rice.