Development of Hybrid Rice Variety FY7206 with Blast Resistance Gene Pid3 and Cold Tolerance Gene Ctb1

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• 作者：Xie Hong-Guang^a ; ^b ; ¹ ; Jiang Jia-Huang^a ; ^b ; ¹ ; Zheng Yan-Mei^a ; ^b ; Zhu Yong-Sheng^a ; ^b ; Wu Fang-Xi^a ; ^b ; Luo Xi^a ; ^b ; Cai Qiu-hua^a ; ^b ; Zhang Jian-Fu^a ; ^b ; ^{jianfzhang@163.com" class="auth_mail" title="E-mail the corresponding author} ; Xie Hua-An^a ; ^b ; ^{huaanxie@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：hybrid rice ; blast resistance gene Pid3 ; cold tolerance gene Ctb1 ; yield ; breeding
• 刊名：Rice Science
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：23
• 期：5
• 页码：266-273
• 全文大小：704 K

文摘

Hybrid rice Fanyou 7206 (FY7206), derived from the cross between a sterile line Fanyuan A and a restorer line Fuhui 7206, was bred by the Rice Research Institute, Fujian Academy of Agricultural Sciences, China. FY7206 was characterized by moderate blast resistance, cold tolerance, as well as wide adaptability, and high yields. The blast resistance results indicated that the frequencies of blast races in race B, race C and the total resistance frequency for FY7206 were 95.5%, 100.0% and 97.2%, respectively. The disease resistance results showed that the leaf blast grade for FY7206 was level 1 and panicle blast was level 5. The indoor spray results indicated that FY7206 was resistant to 11 isolates of Magnorpathe oryzae. The blast resistance of FY7206 might be derived from the high expression of blast resistance gene Pid3. The results for simulated cold resistance in an artificial climate chamber indicated that the cold tolerance for FY7206 was moderate at the booting and flowering stages. The cold tolerance results also indicated that FY7206 could be tolerant to temperatures as low as 10 °C at the seedling stage. The qRT-PCR results showed that the expression of cold tolerance gene Ctb1 in FY7206 was relatively high. These results suggested that FY7206 is a hybrid indica rice variety with good comprehensive characteristics, including blast resistance and cold tolerance.