Dataset Information

Genetic architecture of common bunt resistance in winter wheat using genome-wide association study.

ABSTRACT:

Background

Common bunt (caused by Tilletia caries and T. foetida) has been considered as a major disease in wheat (Triticum aestivum) following rust (Puccinia spp.) in the Near East and is economically important in the Great Plains, USA. Despite the fact that it can be easily controlled using seed treatment with fungicides, fungicides often cannot or may not be used in organic and low-input fields. Planting common bunt resistant genotypes is an alternative.

Results

To identify resistance genes for Nebraska common bunt race, the global set of differential lines were inoculated. Nine differential lines carrying nine different genes had 0% infected heads and seemed to be resistant to Nebraska race. To understand the genetic basis of the resistance in Nebraska winter wheat, a set of 330 genotypes were inoculated and evaluated under field conditions in two locations. Out of the 330 genotypes, 62 genotypes had different degrees of resistance. Moreover, plant height, chlorophyll content and days to heading were scored in both locations. Using genome-wide association study, 123 SNPs located on fourteen chromosomes were identified to be associated with the resistance. Different degrees of linkage disequilibrium was found among the significant SNPs and they explained 1.00 to 9.00% of the phenotypic variance, indicating the presence of many minor QTLs controlling the resistance.

Conclusion

Based on the chromosomal location of some of the known genes, some SNPs may be associated with Bt1, Bt6, Bt11 and Bt12 resistance loci. The remaining significant SNPs may be novel alleles that were not reported previously. Common bunt resistance seems to be an independent trait as no correlation was found between a number of infected heads and chlorophyll content, days to heading or plant height.

SUBMITTER: Mourad AMI

PROVIDER: S-EPMC6234641 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature

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Publications

Genetic architecture of common bunt resistance in winter wheat using genome-wide association study.

Mourad Amira M I AMI Sallam Ahmed A Belamkar Vikas V Mahdy Ezzat E Bakheit Bahy B Abo El-Wafaa Atif A Stephen Baenziger P P

BMC plant biology 20181113 1

<h4>Background</h4>Common bunt (caused by Tilletia caries and T. foetida) has been considered as a major disease in wheat (Triticum aestivum) following rust (Puccinia spp.) in the Near East and is economically important in the Great Plains, USA. Despite the fact that it can be easily controlled using seed treatment with fungicides, fungicides often cannot or may not be used in organic and low-input fields. Planting common bunt resistant genotypes is an alternative.<h4>Results</h4>To identify res ...[more]

PMID: 30424724

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Dataset Information

Genetic architecture of common bunt resistance in winter wheat using genome-wide association study.

Background

Results

Conclusion

Publications

Genetic architecture of common bunt resistance in winter wheat using genome-wide association study.

Similar Datasets

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