Mapping of the QTL (quantitative trait locus) conferring partial resistance to leaf blast in rice cultivar Chubu 32

被引：75

作者：

Zenbayashi, K ^{[1
]}

Ashizawa, T

Tani, T

Koizumi, S

机构：

[1] Natl Agr Res Ctr Tohoku Reg, Akita 0140102, Japan

[2] Aichi Prefectural Agr Res Ctr, Aichi 4801193, Japan

来源：

THEORETICAL AND APPLIED GENETICS | 2002年 / 104卷 / 04期

关键词：

rice (Oryza sativa); leaf blast; partial resistance; restriction fragment length polymorphism (RFLP) quantitative trait locus (QTL);

D O I：

10.1007/s00122-001-0779-y

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

The rice cultivar Chubu 32 possesses a high level of partial resistance to leaf blast. The number and chromosomal location of genes conferring this resistance were detected by restriction fragment length polymorphism (RFLP) linkage mapping and quantitative trait locus (QTL) analysis. For the mapping, 149 F-3 lines derived from the cross between rice cultivar Norin 29, with a low level of partial resistance, and Chubu 32 were used, and their partial resistance to leaf blast was assessed in upland nurseries. A linkage map covering six chromosomes and consisting of 36 RFLP markers was constructed. In the map, only one significant QTL (LOD>2.0) for partial resistance was detected on chromosome 11. This QTL explained 45.6% of the phenotypic variation. The segregation ratio of the F3 lines was 3:1 for partial resistance to susceptibility. These results suggest that the partial resistance in Chubu 32 is controlled by a major gene.

引用

页码：547 / 552

页数：6

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