Clustering of Major Genes Conferring Blast Resistance in a Durable Resistance Rice Cultivar Gumei 2 |
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| Authors: | WU Jian-li CHAI Rong-yao FAN Ye-yang LI De-bao ZHENG Kang-le Hei LEUNG ZHUANG Jie-yun |
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| Institution: | State Key Laboratory of Rice Biology, Chinese National Center for Rice Improvement, China National Rice Research Institute,Hangzhou 310006, China;Institute of Biotechnology, Zhejiang University, Hangzhou 310029, China;Entomology and Plant Pathology Divisi International Rice Research Institute, DAPO P. O. Box 7777, Metro Manila, Philippines Plant Protection Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China State Key Laboratory of Rice Biology, Chinese National Center for Rice Improvement, China National Rice Research Institute,Hangzhou 310006, China Institute of Biotechnology, Zhejiang University, Hangzhou 310029, China State Key Laboratory of Rice Biology, Chinese National Center for Rice Improvement, China National Rice Research Institute,Hangzhou 310006, China Entomology and Plant Pathology Division,International Rice Research Institute, DAPO P. O. Box 7777, Metro Manila, Philippines State Key Laboratory of Rice Biology, Chinese National Center for Rice Improvement, China National Rice Research Institute,Hangzhou 310006, China |
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| Abstract: | By using 304 recombinant inbred lines derived from indica rice cross Zhong 156/Gumei 2, a linkage map consisting of 177 marker loci and covering 12 rice chromosomes was constructed and employed for mapping genes conferring blast resistance in rice. Genomic location of gene Pi25(t) conferring neck blast resistance to the Chinese isolate 92-183 (race ZC15) was verified to be located between markers A7 and RG456 on chromosome 6, with genetic distances of 1.7 cM and 1.5 cM to A7 and RG456,respectively. Leaf blast resistance of Gumei 2 to the Philippine isolate Ca89 (lineage 4) was found to be controlled by a single gene. The gene tentatively designated as Pi26(t) was located between makers B10 and R674 on chromosome 6, with genetic distances of 5.7 cM and 25.8 cM to B10 and R674 respectively. Resistant alleles at both gene loci were derived from Gumei 2,indicating an existence of resistance gene cluster in Gumei 2. |
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| Keywords: | blast resistance molecular mapping gene cluster rice |
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