Yazhan is a restorer rice line bred by Jiangxi Tianya Seed Industry Co., LTD, and its hybrid combination has a high yield, excellent rice quality, and strong resistance. In this study, Yazhan, Huazhan, and Zhanhui 15 were used as the experimental materials. Based on agronomic traits, SSR primer screening and second-generation resequencing were conducted to study the genetic basis of Yazhan. The results showed that the plant height of Yazhan was significantly lower than Zhanhui 15, and the yield was not different from the parent lines. The genetic material on chromosome 1, 3, 4, 5, and 10 in the genome of Yazhan were mainly from Zhanhui 15, genetic materials from chromosomes 2, 6, 8, 9, 11, and 12 mainly come from Huazhan, and the chromosomes 1, 5, and 6 had the most variation. In terms of genomic similarity, Yazhan was more similar to the male parent (Huazhan). Yazhan and Huazhan carried the Wx b genotype, while Zhanhui 15 carried the Wx a genotype. The amylose contents of Yazhan and Huazhan were significantly lower than Zhanhui 15. Yazhan and Huazhan carried the Pita blast resistance gene, and Zhanhui 15 carried the Pita susceptibility gene. The results of this study provide a theoretical reference for elucidating the genetic composition of Yazhan and determining the main genetic sources of its important agronomic traits.

中文翻译：

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水稻恢复系雅占的遗传分析

雅占是江西天雅种业有限公司选育的恢复系水稻系，其杂交组合产量高、水稻品质优良、抗逆性强。本研究以鸭展、华展和展辉 15 为实验材料。以农艺性状为基础，进行SSR引物筛选和二代重测序，研究鸭占的遗传基础。结果表明，雅展株高显着低于展辉15，产量与亲本无差异。雅展基因组中1、3、4、5、10号染色体的遗传物质主要来自沾辉15号，2、6、8、9、11、12号染色体的遗传物质主要来自华展， 1、5 和 6 的变异最大。在基因组相似性方面，鸭展更像父本（华展）。亚占和华占携带Wx b基因型，而沾辉15携带Wx a基因型。雅展和华展的直链淀粉含量显着低于展辉15。雅展和华展携带Pita 抗性基因，展辉15 携带Pita 易感基因。本研究结果为阐明鸭占的遗传组成和确定其重要农艺性状的主要遗传来源提供了理论参考。