Novel QTL for Stripe Rust Resistance on Chromosomes 4A and 6B in Soft White Winter Wheat Cultivars

Klarquist, Emily; Chen, Xianming M.; Carter, Arron H.

doi:10.3390/agronomy6010004

Cited by 25 publications

(21 citation statements)

References 42 publications

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“…However, no available information about the reaction of these two genes against the Egyptian stripe rust race. In addition, many studies mapped novel QTLs controlling adult stage stripe rust resistance to this chromosome which con rming our ndings [45][46][47].…”

Section: Discussionsupporting

confidence: 85%

Genomic Regions Associated With Stripe Rust Resistance Against the Egyptian Race Revealed by Genome-Wide Association Study

Mohamed

Mourad

2020

Preprint

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Background: Wheat stripe rust (caused by Puccinia striiformis f. sp. Tritici), is a major disease that causes huge yield damage. New pathogen races appeared in the last few years and caused a broke down in the resistant genotypes. In Egypt, some of the resistant genotypes began to be susceptible to stripe rust in recent years. This situation increases the need to produce new genotypes with durable resistance. Besides, looking for a new resistant source from the available wheat genotypes all over the world help in enhancing the breeding programs. Results: In the recent study, a set of 103-spring wheat genotypes from different fourteen countries were evaluated to their field resistant to stripe rust for two years. These genotypes included 17 Egyptian genotypes from the old and new cultivars. The 103-spring wheat genotypes were reported to be well adapted to the Egyptian environmental conditions. Out of the tested genotypes, eight genotypes from four different countries were found to be resistant in both years. Genotyping was carried out using genotyping-by-sequencing and a set of 26,703 SNPs were used in the genome-wide association study. Five SNP markers, located on chromosomes 2A and 4A, were found to be significantly associated with the resistance in both years. Three gene models associated with disease resistance and underlying these significant SNPs were identified. One immune Iranian genotype, with the highest number of different alleles from the most resistant Egyptian genotypes, was detected. Conclusion: the high variation among the tested genotypes in their resistance to the Egyptian stripe rust race confirming the possible improvement of stripe rust resistance in the Egyptian wheat genotypes. The identified five SNP markers are stable and could be used in marker-assisted selection after validation in different genetic backgrounds. Crossing between the immune Iranian genotype and the Egyptian genotypes will improve stripe rust resistance in Egypt.

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Section: Discussionsupporting

confidence: 85%

Genomic Regions Associated With Stripe Rust Resistance Against the Egyptian Race Revealed by Genome-Wide Association Study

Mohamed

Mourad

2020

Preprint

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“…Yadav et al [19] used 210 F 2 and 150 BC 1 F 2 mapping population to map QTLs governing the sheath blight resistance in rice. Similarly, Klarquist et al [8] used 151 F 2:5 RIL populations to identify and map QTLs involved in stripe rust resistance in wheat. Moreover, Perchepied et al [20] mapped two new pear resistance loci using three F 1 segregating populations (182, 144 and 81).…”

Section: Genetic Mapping/linkage Mapping Of Genes/qtlsmentioning

confidence: 99%

“…Recently, molecular techniques like molecular markers and genetic engineering are widely used for rapid and efficient accumulation of novel resistant genes from various sources into a single background to produce broad spectrum/ durable resistance in crop plants [1,8,10].…”

Section: Pyramiding Of Genes /Qtls For Biotic Stress Resistancementioning

confidence: 99%

“…Besides, using chemical spray may have adverse effects on human health and the environment, including beneficial organisms and may lead to the development of chemical-resistant pathogen races, insects, and weeds [4,6]. On the other hand, the use of resistant cultivars is currently seen as the best strategy, durable, economical, and environmentally friendly means of biotic stress control [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Identification, Mapping and Pyramiding of Genes/Quantitative Trait Loci (QTLs) for Durable Resistance of Crops to Biotic Stresses

Mekonnen¹,

Haileselassie²,

Tesfaye³

2017

J Plant Pathol Microbiol

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Biotic stresses significantly limit global crop production. Identification and use of resistant cultivars is currently seen as the best strategy, cheapest, durable and environmentally friendly method to manage biotic stresses. However, resistance gained through single gene/quantitative trait loci (QTLs) transfer leads to resistance breakdown within a short period. Hence, current breeding programs targeted at developing durable and/ broad spectrum resistant cultivars by pyramiding multiple resistant genes/QTLs. Despite its significant contributions to crop improvement, gene pyramiding through conventional breeding suffers from being laborious, time consuming, costly and less efficient. Recently, the use of modern molecular tools like molecular markers and genetic engineering has dramatically enhanced the gene pyramiding strategy for biotic stress resistance. Molecular markers are very helpful for precise identification, mapping and introgression of multiple desirable genes/QTLs underlying trait of interest. Moreover, Genetic engineering has enabled scientists to transfer novel genes from any source into plants in a single generation to develop cultivars with the desired agronomic traits. Therefore, the current paper targeted to review the different types of biotic stress resistance in plants and the methodologies for identification, mapping and pyramiding of resistance genes/QTLs to develop durable and/or broad spectrum biotic stress resistant cultivars. So far, numerous crops with durable/broad spectrum resistance to pathogens, insect pests and herbicides have been developed by pyramiding multiple resistant genes/QTLs using marker assisted selection and genetic engineering techniques to contribute to increased crop production and productivity to maintain food security globally.

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“…The results of the QTL analysis showed that QYrel.wak-4A and QYrfi.wak-6B reduced infection type and disease severity. Based upon both molecular and phenotypic differences, QYrel.wak-4A is a novel QTL for adult plant resistance (APR) to stripe rust (Klarquist et al, 2016).…”

Section: Genetic Mapping Of a Putative Thinopyrum Intermedium Derivedmentioning

confidence: 99%

Advanced Breeding Strategies to Mitigate the Threat of Yellow Stripe Rust of Wheat

Sheikh¹,

Dar²,

Sofi³

et al. 2017

Int.J.Curr.Microbiol.App.Sci

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Novel QTL for Stripe Rust Resistance on Chromosomes 4A and 6B in Soft White Winter Wheat Cultivars

Cited by 25 publications

References 42 publications

Genomic Regions Associated With Stripe Rust Resistance Against the Egyptian Race Revealed by Genome-Wide Association Study

Genomic Regions Associated With Stripe Rust Resistance Against the Egyptian Race Revealed by Genome-Wide Association Study

Identification, Mapping and Pyramiding of Genes/Quantitative Trait Loci (QTLs) for Durable Resistance of Crops to Biotic Stresses

Advanced Breeding Strategies to Mitigate the Threat of Yellow Stripe Rust of Wheat

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