Identification of QTLs underlying resistance to a virulent strain of Xanthomonas oryzae pv. oryzae in rice cultivar DV85

被引：14

作者：

Wang, CM

Su, CC

Zhai, HQ

Wan, JM

机构：

[1] Nanjing Agr Univ, Coll Agr, Natl Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Peoples R China

[2] Chinese Acad Agr Sci, Beijing 100081, Peoples R China

来源：

FIELD CROPS RESEARCH | 2005年 / 91卷 / 2-3期

关键词：

bacterial blight; Xanthomonas oryzae pv. oryzae (Xoo) quantitative trait loci (QTLs); resistance gene; mapping population; rice (Oryza sativa L.);

D O I：

10.1016/j.fcr.2004.08.003

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Bacterial blight (BB), caused by Xanthomonas oryzae pv. oryzae (Xoo), is one of the most devastating diseases of rice, in China. A strongly virulent Xoo strain, designated Z-173, is widely distributed across China and Southeast Asia. Indica rice DV85 is known to carry the two resistance genes, xa5 and Xa7 However. their effectiveness against Z-173 is unknown. Using a recombinant inbred line (RIL) population derived from a cross between DV85 and the susceptible cultivar Kinmaze, we have, identified the quantitative trait loci (QTLs) responsible for the resistance of DV85 to Z-173. Following 2 years of phenotyping. three QTLs associated with the resistance were detected. These were linked to RFLP markers X362, X292 and G1091 on chromosomes 3, 5, and 6, respectively. Qxa-5 and Qxa-6 probably correspond to xa5 and Xa7, respectively. Both the xa5 and Xa7 resistances are stable over different years. and act independently of one another in determining resistance. The effect of xa5 was larger than that of XaT Efficient ways to improve the resistance to Z-173 are discussed. Published by Elsevier B.V.

引用

页码：337 / 343

页数：7

共 23 条

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