Journal article
Genome-Wide Association Mapping for Tolerance to Preharvest Sprouting and Low Falling Numbers in Wheat
Frontiers in plant science, Vol.9, pp.141-141
02/14/2018
Handle:
https://hdl.handle.net/2376/113722
PMCID: PMC5817628
PMID: 29491876
Abstract
Preharvest sprouting (PHS), the germination of grain on the mother plant under cool and wet conditions, is a recurring problem for wheat farmers worldwide. α-amylase enzyme produced during PHS degrades starch resulting in baked good with poor end-use quality. The Hagberg-Perten Falling Number (FN) test is used to measure this problem in the wheat industry, and determines how much a farmer's wheat is discounted for PHS damage. PHS tolerance is associated with higher grain dormancy. Thus, breeding programs use germination-based assays such as the spike-wetting test to measure PHS susceptibility. Association mapping identified loci associated with PHS tolerance in U.S. Pacific Northwest germplasm based both on FN and on spike-wetting test data. The study was performed using a panel of 469 white winter wheat cultivars and elite breeding lines grown in six Washington state environments, and genotyped for 15,229 polymorphic markers using the 90k SNP Illumina iSelect array. Marker-trait associations were identified using the FarmCPU R package. Principal component analysis was directly and a kinship matrix was indirectly used to account for population structure. Nine loci were associated with FN and 34 loci associated with PHS based on sprouting scores. None of the
QFN.wsu
loci were detected in multiple environments, whereas six of the 34
QPHS.wsu
loci were detected in two of the five environments. There was no overlap between the QTN detected based on FN and PHS, and there was little correlation between the two traits. However, both traits appear to be PHS-related since 19 of the 34
QPHS.wsu
loci and four of the nine
QFN.wsu
loci co-localized with previously published dormancy and PHS QTL. Identification of these loci will lead to a better understanding of the genetic architecture of PHS and will help with the future development of genomic selection models.
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Details
- Title
- Genome-Wide Association Mapping for Tolerance to Preharvest Sprouting and Low Falling Numbers in Wheat
- Creators
- Shantel A Martinez - Molecular Plant Sciences, Washington State UniversityJayfred Godoy - Department of Crop and Soil Sciences, Washington State UniversityMeng Huang - Department of Crop and Soil Sciences, Washington State UniversityZhiwu Zhang - Molecular Plant Sciences, Washington State UniversityArron H Carter - Molecular Plant Sciences, Washington State UniversityKimberly A Garland Campbell - Molecular Plant Sciences, Washington State UniversityCamille M Steber - Molecular Plant Sciences, Washington State University
- Publication Details
- Frontiers in plant science, Vol.9, pp.141-141
- Academic Unit
- Crop and Soil Sciences, Department of
- Publisher
- Frontiers Media S.A
- Grant note
- 7599; 5389; 126593 / Washington Grain Commission 2015-05798; 2016-68004-24770 / National Institute of Food and Agriculture 424575 / Agricultural Research Service
- Identifiers
- 99900547607001842
- Language
- English
- Resource Type
- Journal article