2020
DOI: 10.21203/rs.2.20460/v1
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Genome-wide association studies on heat stress tolerance during grain development in wheat (Triticum aestivum L.)

Abstract: BackgroundHeat stress at the late reproductive stages is a common problem encountered in autumn-sown wheat production regions in China with the affected area covering as much as two-thirds of the crop. In order to develop wheat cultivars with heat-tolerance, it is crucial to explore favorable alleles for use in breeding programs.ResultsIn this study, we performed a 90K iSelect SNP genotyping assay on a collection of 207 wheat cultivars subjected to heat stress during grain-fill growth stage in three years (201… Show more

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Cited by 7 publications
(8 citation statements)
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References 56 publications
(78 reference statements)
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“…Climate change is causing not only an increase in global average temperatures, but also the more frequent occurrence of extreme weather events [3]. The averaged Earth's surface temperature risen about 0.85˚C from 1880 to 2012 and is forecast to continuously increasing [4]. To develop the heat tolerant wheat genotype, it is necessary to explore desired alleles to use in breeding programs.…”
Section: Introductionmentioning
confidence: 99%
“…Climate change is causing not only an increase in global average temperatures, but also the more frequent occurrence of extreme weather events [3]. The averaged Earth's surface temperature risen about 0.85˚C from 1880 to 2012 and is forecast to continuously increasing [4]. To develop the heat tolerant wheat genotype, it is necessary to explore desired alleles to use in breeding programs.…”
Section: Introductionmentioning
confidence: 99%
“…Other fertility loci responsive to temperature and other environmental factors were considered for their potential relationships to WtmsDW . These included loci described in wheat ( Kuchel et al, 2007 ; Mason et al, 2010 , 2011 , 2013 ; Pinto et al, 2010 ; Zheng et al, 2010 ; Pandey et al, 2014 ; Sharma et al, 2016 ; Shirdelmoghanloo et al, 2016 ; Barber et al, 2017 ; Bhusal et al, 2017 ; Pradhan et al, 2019 ; Guo et al, 2020 ; Lu et al, 2020 ; Selva et al, 2020 and references therein), durum ( Triticum durum Desf.) ( El Hassouni et al, 2019 ), barley ( Hordeum vulgare L.) ( Romagosa et al, 1999 ; Malosetti et al, 2004 ), and rice ( Oryza sativa L.) ( Yu et al, 2017 ; Zhu et al, 2017 ; Fan and Zhang, 2018 and references therein; Khlaimongkhon et al, 2019 ; Cao et al, 2020 ; Nubankoh et al, 2020 ).…”
Section: Methodsmentioning
confidence: 99%
“…Various efforts have been made to identify grain filling heat tolerance quantitative trait loci (QTL) in hexaploid wheat, involving transfers of potted plants into a growth chamber set at high temperatures, at 7-10 days after anthesis (Mohammadi et al, 2008;Mason et al, 2010Mason et al, , 2011Shirdelmoghanloo et al, 2016;Guo et al, 2020;Lu et al, 2020). However, relatively few studies have targeted floret fertility responses to heat stress applied at booting or at around anthesis (Barber et al, 2017).…”
Section: Introductionmentioning
confidence: 99%
“…A genome-wide association study (GWAS) analysis was performed on a collection of 207 cultivars for 19 phenotypic traits in wheat, identified 125 marker-trait associations (MTAs) under HS during the grain filling stage [124]. These MTAs prevailing in 16 chromosomes at a total of 63 single nucleotide polymorphism (SNP) loci revealed phenotypic variation (R 2 ) of 3.0-21.4%.…”
Section: The Contribution Of Gwasmentioning
confidence: 99%
“…These MTAs prevailing in 16 chromosomes at a total of 63 single nucleotide polymorphism (SNP) loci revealed phenotypic variation (R 2 ) of 3.0-21.4%. Four major QTLs for HS tolerance identified impact starch accumulation in grain, grain filling, and grain flour related traits, that is, QTL on 2B significantly affects grain weight and flour pasting properties [124]. Besides, six HS responsive traits were considered to conduct a GWAS analysis in 135 accessions of pea (Pisum sativum L.) plants under three different environments [(genotype (G), environment (E), and G Â E interaction)] [125].…”
Section: The Contribution Of Gwasmentioning
confidence: 99%