Identification of quantitative trait loci associated with small brown planthopper (Laodelphax striatellus Fallén) resistance in rice (Oryza sativa L.)

Le Quang Tuyen,Jianmin Wan,Baoxiang Wang,Yuqiang Liu,Ling Jiang,Qi Wang,Than Thi Thu Hanh

doi:10.1111/j.1601-5223.2011.02231.x

Le Quang Tuyen, Jianmin Wan + Show 5 more

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https://doi.org/10.1111/j.1601-5223.2011.02231.x

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Journal: Hereditas	Publication Date: Dec 19, 2011
Citations: 20	License type: cc-by

Affiliation: Nanjing Agricultural University

Abstract

F(2) and BC(1) populations derived from the cross between 02428 / Rathu Heenati were used to investigate small brown planthopper (SBPH) resistance. Using the F(2) population, three QTLs for antixenosis against SBPH were located on chromosomes 2, 5 and 6, and accounted for 30.75% of the phenotypic variance; three QTLs for antibiosis against SBPH were detected on chromosomes 8, 9 and 12. qSBPH5-c explaining 7.21% of phenotypic variance for antibiosis was identified on chromosome 5 using the BC(1) population. A major QTL, qSBPH12-a1, explained about 40% of the phenotypic variance, and a minor QTL, qSBPH4-a, was detected by the SSST method in both the F(2) and BC(1) populations. The QTLs indentified in the present study will be useful for marker assisted selection of SBPH resistance in rice.

Highlights

Rice (Oryza sativa L.) is a staple food for more than 50% of the world population
Using the F2 population, three QTLs for antixenosis against small brown planthopper (SBPH) were located on chromosomes 2, 5 and 6, and accounted for 30.75% of the phenotypic variance; three QTLs for antibiosis against SBPH were detected on chromosomes 8, 9 and 12. qSBPH5-c explaining 7.21% of phenotypic variance for antibiosis was identified on chromosome 5 using the BC1 population
The two QTLs came from Rathu Heenati (Table 5). These results indicated that a major QTL qSBPH12-a1 and some minor QTLs controlled Small brown planthopper resistance in Rathu Heenati

Summary

Introduction

Insect pests are major biotic constraints in rice production. Three SBPH resistance QTLs, Qsbph2b, Qsbph3d and Qsbph12a on chromosomes 2, 3 and 12 were detected using an F2 population from a cross of Wuyujing 3 (japonica) and Mudgo (indica) (Duan et al 2009). One major resistance gene was always short-lived due to adaptation of insect population in overcoming its effect. Three QTLs Qbph, Qbph and Qbph for resistance to this pest were detected on chromosomes 3, 4 and 10, and a major QTL, Qbph, was designed as Bph (Sun et al 2005). In order to find more SBPH resistance genes, the object of this study was to identify resistance genes in rice variety Rathu Heenati

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Conclusion