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Genetic architecture of end-use quality traits in soft white winter wheat

BACKGROUND: Genetic improvement of end-use quality is an important objective in wheat breeding programs to meet the requirements of grain markets, millers, and bakers. However, end-use quality phenotyping is expensive and laborious thus, testing is often delayed until advanced generations. To better...

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Autores principales: Aoun, Meriem, Carter, Arron H., Morris, Craig F., Kiszonas, Alecia M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9195237/
https://www.ncbi.nlm.nih.gov/pubmed/35701755
http://dx.doi.org/10.1186/s12864-022-08676-5
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author Aoun, Meriem
Carter, Arron H.
Morris, Craig F.
Kiszonas, Alecia M.
author_facet Aoun, Meriem
Carter, Arron H.
Morris, Craig F.
Kiszonas, Alecia M.
author_sort Aoun, Meriem
collection PubMed
description BACKGROUND: Genetic improvement of end-use quality is an important objective in wheat breeding programs to meet the requirements of grain markets, millers, and bakers. However, end-use quality phenotyping is expensive and laborious thus, testing is often delayed until advanced generations. To better understand the underlying genetic architecture of end-use quality traits, we investigated the phenotypic and genotypic structure of 14 end-use quality traits in 672 advanced soft white winter wheat breeding lines and cultivars adapted to the Pacific Northwest region of the United States. RESULTS: This collection of germplasm had continuous distributions for the 14 end-use quality traits with industrially significant differences for all traits. The breeding lines and cultivars were genotyped using genotyping-by-sequencing and 40,518 SNP markers were used for association mapping (GWAS). The GWAS identified 178 marker-trait associations (MTAs) distributed across all wheat chromosomes. A total of 40 MTAs were positioned within genomic regions of previously discovered end-use quality genes/QTL. Among the identified MTAs, 12 markers had large effects and thus could be considered in the larger scheme of selecting and fixing favorable alleles in breeding for end-use quality in soft white wheat germplasm. We also identified 15 loci (two of them with large effects) that can be used for simultaneous breeding of more than a single end-use quality trait. The results highlight the complex nature of the genetic architecture of end-use quality, and the challenges of simultaneously selecting favorable genotypes for a large number of traits. This study also illustrates that some end-use quality traits were mainly controlled by a larger number of small-effect loci and may be more amenable to alternate selection strategies such as genomic selection. CONCLUSIONS: In conclusion, a breeder may be faced with the dilemma of balancing genotypic selection in early generation(s) versus costly phenotyping later on. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12864-022-08676-5.
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spelling pubmed-91952372022-06-15 Genetic architecture of end-use quality traits in soft white winter wheat Aoun, Meriem Carter, Arron H. Morris, Craig F. Kiszonas, Alecia M. BMC Genomics Research BACKGROUND: Genetic improvement of end-use quality is an important objective in wheat breeding programs to meet the requirements of grain markets, millers, and bakers. However, end-use quality phenotyping is expensive and laborious thus, testing is often delayed until advanced generations. To better understand the underlying genetic architecture of end-use quality traits, we investigated the phenotypic and genotypic structure of 14 end-use quality traits in 672 advanced soft white winter wheat breeding lines and cultivars adapted to the Pacific Northwest region of the United States. RESULTS: This collection of germplasm had continuous distributions for the 14 end-use quality traits with industrially significant differences for all traits. The breeding lines and cultivars were genotyped using genotyping-by-sequencing and 40,518 SNP markers were used for association mapping (GWAS). The GWAS identified 178 marker-trait associations (MTAs) distributed across all wheat chromosomes. A total of 40 MTAs were positioned within genomic regions of previously discovered end-use quality genes/QTL. Among the identified MTAs, 12 markers had large effects and thus could be considered in the larger scheme of selecting and fixing favorable alleles in breeding for end-use quality in soft white wheat germplasm. We also identified 15 loci (two of them with large effects) that can be used for simultaneous breeding of more than a single end-use quality trait. The results highlight the complex nature of the genetic architecture of end-use quality, and the challenges of simultaneously selecting favorable genotypes for a large number of traits. This study also illustrates that some end-use quality traits were mainly controlled by a larger number of small-effect loci and may be more amenable to alternate selection strategies such as genomic selection. CONCLUSIONS: In conclusion, a breeder may be faced with the dilemma of balancing genotypic selection in early generation(s) versus costly phenotyping later on. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12864-022-08676-5. BioMed Central 2022-06-14 /pmc/articles/PMC9195237/ /pubmed/35701755 http://dx.doi.org/10.1186/s12864-022-08676-5 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research
Aoun, Meriem
Carter, Arron H.
Morris, Craig F.
Kiszonas, Alecia M.
Genetic architecture of end-use quality traits in soft white winter wheat
title Genetic architecture of end-use quality traits in soft white winter wheat
title_full Genetic architecture of end-use quality traits in soft white winter wheat
title_fullStr Genetic architecture of end-use quality traits in soft white winter wheat
title_full_unstemmed Genetic architecture of end-use quality traits in soft white winter wheat
title_short Genetic architecture of end-use quality traits in soft white winter wheat
title_sort genetic architecture of end-use quality traits in soft white winter wheat
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9195237/
https://www.ncbi.nlm.nih.gov/pubmed/35701755
http://dx.doi.org/10.1186/s12864-022-08676-5
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