Phenotyping slow leaf rusting components and validation of adult plant resistance genes in exotic wheat germplasm

J, Yashavanthakumar K.; Desai, S. A.; Biradar, Suma; Kalappanavar, I. K.; R.V, Rudranaik; Ashutosh, Kumar; Koujalagi, Deepak; T.N, Sathisha

doi:10.1007/s13313-018-0599-z

Cited by 2 publications

(1 citation statement)

References 23 publications

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“…The quantitatively inherited QTLs can be either seedling stage, adult-stage or all growth stage resistant to STB pathogen 21 . Linkage-based QTL mapping and genome-wide association studies have been instrumental to identify QTLs linked to either seedling-, adult- or all-stage STB resistance 10 , 22 – 24 .…”

Section: Introductionmentioning

confidence: 99%

Exploring GWAS and genomic prediction to improve Septoria tritici blotch resistance in wheat

Zakieh,

Alemu,

Henriksson

et al. 2023

Sci Rep

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Septoria tritici blotch (STB) is a destructive foliar diseases threatening wheat grain yield. Wheat breeding for STB disease resistance has been identified as the most sustainable and environment-friendly approach. In this work, a panel of 316 winter wheat breeding lines from a commercial breeding program were evaluated for STB resistance at the seedling stage under controlled conditions followed by genome-wide association study (GWAS) and genomic prediction (GP). The study revealed a significant genotypic variation for STB seedling resistance, while disease severity scores exhibited a normal frequency distribution. Moreover, we calculated a broad-sense heritability of 0.62 for the trait. Nine single- and multi-locus GWAS models identified 24 marker-trait associations grouped into 20 quantitative trait loci (QTLs) for STB seedling-stage resistance. The seven QTLs located on chromosomes 1B, 2A, 2B, 5B (two), 7A, and 7D are reported for the first time and could potentially be novel. The GP cross-validation analysis in the RR-BLUP model estimated the genomic-estimated breeding values (GEBVs) of STB resistance with a prediction accuracy of 0.49. Meanwhile, the GWAS assisted wRR-BLUP model improved the accuracy to 0.58. The identified QTLs can be used for marker-assisted backcrossing against STB in winter wheat. Moreover, the higher prediction accuracy recorded from the GWAS-assisted GP analysis implies its power to successfully select superior candidate lines based on their GEBVs for STB resistance.

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Section: Introductionmentioning

confidence: 99%

Exploring GWAS and genomic prediction to improve Septoria tritici blotch resistance in wheat

Zakieh,

Alemu,

Henriksson

et al. 2023

Sci Rep

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Components of slow disease development: a key to enhance resistance in crops

Shikha,

Chand,

Mishra

et al. 2024

CABI Agric Biosci

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Plant resistance is a result of interaction between host, pathogen, environment and temporal factors. Major or “R” gene resistance may break down following the emergence of virulent isolates of a pathogen. Limited durability of R genes has opened the door for the utilization of slow disease resistance in crop breeding. Plant pathogens with high reproduction ability exhibit greater genetic diversity leading to loss of major gene-based resistance. Consequently, minor genes-based resistance can be effectively employed against all the available virulent isolates within a pathogen population, including non-elicitor producing pathogens. Several researchers have identified valuable genetic sources by screening germplasm collections and characterizing genes conferring slow disease development. The identification and possible cloning or tagging of such genes obtained from crop wild relatives will create better opportunities for their use in crop improvement. Nevertheless, very little information is available about the nature of individual genes responsible for slow disease development. A thorough understanding of the nature of inheritance of slow disease resistance, interactions, and the possible breeding strategies to enhance resistance governed by slow disease components will help in breeding or developing resistant cultivars with enhanced yield. This review discusses the components of SDD in terms of identification, characterization, factors influencing it, and breeding strategies to enhance resistance governed by SDD components. Furthermore it emphasizes the importance of targeted breeding strategies to exploit the potential of SSD in developing cultivars with enhanced resistance and maintaining a good yield.

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Phenotyping slow leaf rusting components and validation of adult plant resistance genes in exotic wheat germplasm

Cited by 2 publications

References 23 publications

Exploring GWAS and genomic prediction to improve Septoria tritici blotch resistance in wheat

Exploring GWAS and genomic prediction to improve Septoria tritici blotch resistance in wheat

Components of slow disease development: a key to enhance resistance in crops

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