Abstract:

The utilization of heterosis between indica and japonica rice subspecies is an effective way to improve rice yield. Huazhongyou 9326 is a new indica-japonica hybrid rice variety bred by Zhejiang Academy of Agricultural Sciences and Zhejiang Wuwangnong Seed Shareholding Co., Ltd. It was approved by National Crop Variety Approval Committee in 2022. In order to comprehensively understand the production characteristics of this variety and accelerate its rational promotion and application, we analyzed the yield, quality and resistance of Huazhongyou 9326 through methods such as coefficient of variation, Shukla variance analysis, high stability coefficient, regression analysis, and fitness with molecular markers of resistance alleles, based on the data of “the regional test of single-season late japonica varieties in the middle and lower reaches of the Yangtze River” in 2020 and 2021，and compared the prolificacy, stability and adaptability to the control variety Jiayou 5. In the regional and production trials, the average yield of Huazhongyou 9326 increased by 13.45% and 10.95% respectively compared to Jiayou 5, with the proportion of increased production points being 96.15% and 100.0%, respectively. The three-years high stability coefficient of Huazhongyou 9326 was 91.78%, which was increased 6.49% than that of Jiayou 5, indicating that Huazhongyou 9326 had good stability. According to the quality data, Huazhongyou 9326 is classified as Grade 3 with a steaming and cooking taste value of 85.12. In conclusion, Huazhongyou 9326 is an ideal indica/japonica hybrid rice variety with prolificacy, stability and adaptability.

Key words: rice, Huazhongyou 9326, quality, disease resistance, prolificacy, stability, adaptability

摘要：

籼粳亚种间杂种优势的利用是提高水稻产能的一条有效途径。华中优9326是浙江省农业科学院、浙江勿忘农种业股份有限公司育成的籼粳杂交稻新品种，于2022年通过国家审定。为全面了解该品种的生产特性，加快其推广应用，以2020—2021年勿忘农种业科企水稻联合体长江中下游单季晚粳组品种区域试验结果为基础，通过均值变异系数、Shukla方差分析、高稳系数、回归分析以及适应度等方法，并结合抗性等位基因的分子分析，对华中优9326的产量、品质和抗性进了分析，并与对照品种嘉优5号的丰产稳产性及适应性进行了比较。在区域试验和生产试验中，华中优9326平均产量分别比对照嘉优5号增产13.45%和10.95%，增产点比例分别为96.15%和100.0%；同时，华中优9326的3年高稳系数为91.78%，比对照嘉优5号高6.49个百分点，说明华中优9326的丰产稳产性更好。而稻米品质数据显示，华中优9326为部标优质3级米且蒸煮食味值为85.12分。综上，华中优9326具有很好的丰产稳产性及较好的适应性，是一个理想的籼粳杂交稻新品种。

关键词: 水稻, 华中优9326, 品质, 抗病性, 丰产性, 稳产性, 适应性