The distribution and identification of brown planthopper resistance genes in rice

Yuqiang Liu,Cheng Peng,Ling Jiang,Jun He,Han Wu,Changchao Su,Jianmin Wan

doi:10.1111/j.1601-5223.2009.02088.x

Yuqiang Liu, Cheng Peng + Show 5 more

Open Access

https://doi.org/10.1111/j.1601-5223.2009.02088.x

Copy DOI

Abstract

A collection of 515 rice landraces originating from Vietnam and China were screened for the reaction to brown planthopper (BPH) infestation. Most of the resistant landraces were indica types from Vietnam and the Guangxi province in China. An F(2) mapping population was created from the cross between a BPH resistant Vietnamese landrace Yagyaw and the susceptible cultivar Cpslo17. Four quantitative trait loci (QTL) contributing to BPH resistance were mapped on chromosomes 2, 4, 7 and 9, respectively. The individual QTL accounted 5.64% to 12.77% of the phenotypic variance, and three resistant alleles were harbored in the resistant landrace Yagyaw. Two QTL located on chromosomes 2 and 4 were identified with significant additive effects and are useful in breeding new rice inbred lines. One resistant allele was harbored by the susceptible parent Cpslo17. This gene is important in selecting rice inbred lines with stronger resistances to BPH.

Highlights

A collection of 515 rice landraces originating from Vietnam and China were screened for the reaction to brown planthopper (BPH) infestation
Due to the capacity of BPH to vary with respect to pathogenicity, genetic resistance based on some major genes has been short-lived (GALLAGHER et al 1994; KETIPEARACHCHI et al 1998)
To map the BPH resistance of the Vietnamese landrace Yagyaw (YA), a mapping population of 180 F2 plants was created from a cross with the wide-compatibility susceptible cultivar Cpslo17

Summary

Introduction

A collection of 515 rice landraces originating from Vietnam and China were screened for the reaction to brown planthopper (BPH) infestation. An F2 mapping population was created from the cross between a BPH resistant Vietnamese landrace Yagyaw and the susceptible cultivar Cpslo. Four quantitative trait loci (QTL) contributing to BPH resistance were mapped on chromosomes 2, 4, 7 and 9, respectively. The individual QTL accounted 5.64% to 12.77% of the phenotypic variance, and three resistant alleles were harbored in the resistant landrace Yagyaw. One resistant allele was harbored by the susceptible parent Cpslo17 This gene is important in selecting rice inbred lines with stronger resistances to BPH. The genetic basis of BPH resistance has been widely explored, and 19 single major resistance genes and several quantitative trait loci (QTL) have to date been identified in screens of ssp. The objective of the present study was to study the distribution of BPH resistance in landrace materials, and to characterize some of these novel sources of resistance

Objectives

Methods

Results

Conclusion