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QTL mapping identifies a major locus for resistance in wheat to Sunn pest (Eurygaster integriceps) feeding at the vegetative growth stage

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Title QTL mapping identifies a major locus for resistance in wheat to Sunn pest (Eurygaster integriceps) feeding at the vegetative growth stage
 
Creator Emebiri, Livinus C.
 
Contributor Tan, Mui-Keng
El Bouhssini, Mustapha
Wildman, Ossie
Jighly, Abdul-Qader
Tadesse, Wuletaw
Ogbonnaya, Francis Chuks
 
Subject genetic
pests and disease
Wheat
 
Description Sunn pest (Eurygaster integriceps Puton) is the most destructive insect pest of bread wheat and durum wheat in West and Central Asia and East Europe. Breeding for resistance at the vegetative stage of growth is vital in reducing the damage caused by overwintered adult populations that feed on shoot and leaves of seedlings, and in reducing the next generation of pest populations (nymphs and adults), which can cause damage to grain quality by feeding on spikes. In the present study, two doubled haploid (DH) populations involving resistant landraces from Afghanistan were genotyped with the 90k SNP iSelect assay and candidate gene-based KASP markers. The DH lines and parents were phenotyped for resistance to Sunn pest feeding, using artificial infestation cages at Terbol station, in Lebanon, over three years. Quantitative trait locus (QTL) analysis identified a single major locus on chromosome 4BS in the two populations, with the resistance allele derived from the landrace accessions, IG139431 and IG139883. The QTL explained a maximum of 42 % of the phenotypic variation in the Cham6 × IG139431 and 56 % in the Cham6 × IG139883 populations. SNP markers closest to the QTL showed high similarity to rice genes that putatively encode proteins for defense response to herbivory and wounding. The markers were validated in a large, unrelated population of parental wheat genotypes. All wheat lines carrying the ‘C–G’ haplotype at the identified SNPs were resistant, suggesting that selection based on a haplotype of favourable alleles would be effective in predicting resistance status of unknown genotypes.
 
Date 2017-02-28
2017-02-27T12:38:14Z
2017-02-27T12:38:14Z
 
Type Journal Article
 
Identifier https://mel.cgiar.org/dspace/limited
https://link.springer.com/article/10.1007/s00122-016-2812-1
Livinus C. Emebiri, Mui-Keng Tan, Mustapha El Bouhssini, Ossie Wildman, Abdul-Qader Jighly, Wuletaw Tadesse, Francis Chuks Ogbonnaya. (28/2/2017). QTL mapping identifies a major locus for resistance in wheat to Sunn pest (Eurygaster integriceps) feeding at the vegetative growth stage. TAG Theoretical and Applied Genetics, 130 (2), pp. 309-318.
https://hdl.handle.net/20.500.11766/6030
Limited access
 
Language en
 
Rights CC-BY-NC-4.0
 
Format PDF
 
Publisher Springer Verlag (Germany)
 
Source TAG Theoretical and Applied Genetics;130,(2016) Pagination 309,318