Phytopathology. 1998 Aug;88(8):822-7. doi: 10.1094/PHYTO.1998.88.8.822.
ABSTRACT Genetic analysis of the rice cultivar Aichi Asahi and some other Japanese cultivars for the high resistance to the blast fungus isolate CHNOS58-3-1 from China was performed. All the Japanese differential cultivars were resistant to the isolate except for 'Pi No. 4', which showed moderate resistance. Analysis of the F(2) population of a cross of the susceptible cultivar Reiho and the resistant cultivar Aichi Asahi indicated that the resistance of 'Aichi Asahi' to the isolate was conferred by one dominant gene. To identify the gene in other Japanese differential cultivars, AK lines, which were derived from a cross of 'Aichi Asahi' x 'K59' and assumed to harbor no known genes except for the new one, were used for the allelism tests. The new, completely dominant resistance gene was detected in 14 differential cultivars, but not in 'Pi No. 4', 'Yashiro-mochi', and 'K1', and was designated as Pi19(t). Pi19(t) was allelic or closely linked to Pita(2) on chromosome 12. Pi19(t) was extensively distributed among Japanese traditional local cultivars.
摘要 对水稻品种爱知旭和一些其他日本品种进行了遗传分析，以研究它们对来自中国的稻瘟病菌分离株 CHNOS58-3-1 的高抗性。除了 'Pi No. 4' 表现出中度抗性外，所有日本鉴别品种均对该分离株表现出抗性。对感病品种 Reiho 和抗性品种爱知旭杂交的 F2 群体进行分析表明，'Aichi Asahi'对该分离株的抗性由一个显性基因控制。为了鉴定其他日本鉴别品种中的基因，使用 AK 系进行等位基因测试，AK 系是 'Aichi Asahi' x 'K59' 的杂交后代，假设除了新基因外，没有已知的基因。在 14 个鉴别品种中检测到了新的、完全显性的抗性基因，但在 'Pi No. 4'、'Yashiro-mochi'和 'K1' 中未检测到，将其命名为 Pi19(t)。Pi19(t)与第 12 号染色体上的 Pita(2) 等位或紧密连锁。Pi19(t) 在日本传统地方品种中广泛分布。
