摘要:
1991～1994年鉴定了抗瘟抗源品种矮秆特特普(Tetep)、赤块矮选、红脚占、梧农1号和谷农13等的抗瘟性,抗小种率分别达100.0%、72.73%、81.82%、81.82%和100.0%;抗菌株率分别达96.01%、95.21%、94.52%、94.57%和98.46%;经全国和福建省稻瘟病圃鉴定,除梧农1号表现中抗外,其他4个抗源均高抗叶、穗瘟。抗瘟性遗传分析表明,矮秆特特普、赤块矮选、红脚占、梧农1号对中氏A49、中B1和中B13三个小种表现有2对抗性显性基因控制,但梧农1号对中C13生理小种仅表现1对抗性显性基因控制;赤块矮选分别与梧农1号、谷农13杂交F2代,对中B13和中C13表现为3对抗性显性基因控制。
Abstract:
Rice blastresistant varieties,Dwarf Tetep,ChiKuaiai,Hongjiaozhan,Wunong N0. 1 and Gunong No. 13 were identified for their blast resistanec in 1990～1993.The resistant rates of these varieties to physiological races were 100.0%,72.73%,81 82%,8l.82%and 100.0%respective-ly,and to isolated strains were 96.01%,95.21%,94.52%,94.57%and 98.46%respective-ly。These 5 varieties were also undertaken the jiont identification in national and Fujian provincial uniform rice blast nursery.The results showed that,4 of them performed highly resistant to leaf and panicle blast,except Wunong No.1 which appeared middle resistant Genetic analysis showed that,the resistanec to physiological races ZA49,ZB1 and ZB13 of the varieties Dwarf Tetep,Chikuaiai and Wunong No.1 were governed by two pairs of dominant genes,while the variety Wunong No.1had only one dorninant gene of resistance to race ZC1.Segregation ratioes of three pairs of genes for the resistance to races ZB13 and ZC13 were detected in F2 populations of the crosses of Chikuaiai/Wunong No.1 and Chikuaiai/Gunong No.13,respectively.
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