Seed dormancy in barley is dictated by genetics, environments and their interactions

Gong, Xue; Li, Chengdao; Zhou, Meixue; Bonnardeaux, Yumiko; Yan, Guijun

doi:10.1007/s10681-014-1072-x

Cited by 17 publications

(19 citation statements)

References 31 publications

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“…The third QTL linked with germination stage tolerance is mapped on chromosome 5H. This QTL is slightly distant from potassium concentration linked QTL reported previously [2] but appears to be very closely located with seed dormancy linked QTL on chromosome 5HC in a population generated from Stirling and Harrington barley varieties [19]. The chromosome 5H QTL may be the same locus associated with seed dormancy in these studies.…”

Section: Discussionsupporting

confidence: 47%

Early growth stages salinity stress tolerance in CM72 x Gairdner doubled haploid barley population

et al. 2017

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A doubled haploid (DH) population of barley (Hordeum vulgare L.) generated from salinity tolerant genotype CM72 and salinity sensitive variety Gairdner was studied for salinity stress tolerance at germination, seedling emergence and first leaf full expansion growth stages. Germination study was conducted with deionized water, 150 mM and 300 mM NaCl treatments. Seedling stage salinity tolerance was conducted with three treatments: control, 150 mM NaCl added at seedling emergence and first leaf full expansion growth stages. Results from this study revealed transgressive phenotypic segregations for germination percentage and biomass at seedling stage. Twelve QTL were identified on chromosomes 2H–6H each explaining 10–25% of the phenotypic variations. A QTL located at 176.5 cM on chromosome 3H was linked with fresh weight per plant and dry weight per plant in salinity stress induced at first leaf full expansion growth stage, and dry weight per plant in salinity stress induced at seedling emergence. A stable QTL for germination at both 150 and 300 mM salinity stress was mapped on chromosome 2H but distantly located from a QTL linked with seedling stage salinity stress tolerance. QTL, associated markers and genotypes identified in this study play important roles in developing salinity stress tolerant barley varieties.

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Section: Discussionsupporting

confidence: 47%

Early growth stages salinity stress tolerance in CM72 x Gairdner doubled haploid barley population

et al. 2017

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“…In barley, two major QTLs for seed dormancy, termed SD1 and SD2, located on chromosome 5H, were identified by linkage mapping (Gong, Li, Zhou, Bonnardeaux, & Yan, 2014;Li et al, 2003). However, no genome-wide association study (GWAS) was conducted to reveal the genetic background of barley seed dormancy.…”

Section: Introductionmentioning

confidence: 99%

Novel loci and a role for nitric oxide for seed dormancy and preharvest sprouting in barley

Nagel

Alqudah

Bailly

et al. 2019

Plant Cell & Environment

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Barley is used for food and feed, and brewing. Nondormant seeds are required for malting, but the lack of dormancy can lead to preharvest sprouting (PHS), which is also undesired. Here, we report several new loci that modulate barley seed dormancy and PHS. Using genome‐wide association mapping of 184 spring barley genotypes, we identified four new, highly significant associations on chromosomes 1H, 3H, and 5H previously not associated with barley seed dormancy or PHS. A total of 71 responsible genes were found mostly related to flowering time and hormone signalling. A homolog of the well‐known Arabidopsis Delay of Germination 1 (DOG1) gene was annotated on the barley chromosome 3H. Unexpectedly, DOG1 appears to play only a minor role in barley seed dormancy. However, the gibberellin oxidase gene HvGA20ox1 contributed to dormancy alleviation, and another seven important loci changed significantly during after‐ripening. Furthermore, nitric oxide release correlated negatively with dormancy and shared 27 associations. Origin and growth environment affected seed dormancy and PHS more than did agronomic traits. Days to anthesis and maturity were shorter when seeds were produced under drier conditions, seeds were less dormant, and PHS increased, with a heritability of 0.57–0.80. The results are expected to be useful for crop improvement.

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“…In an another study in wheat, four consistent QTLs were identified for PHS on chromosome 4A that showed maximum 58.1% of the phenotypic variation (Cabral et al 2014). Similarly in the case of barley, QTLs were identified on 4H, 5H and 6H and explained 25, 81 and 12% PV, respectively (Gong et al 2014). In the case of rice, PHS has been reported as a complex and polygenic trait.…”

Section: Dense Genetic Linkage Mapmentioning

confidence: 82%

“…Similarly in the case of barley, QTLs were identified on 4H, 5H and 6H and explained 25, 81 and 12% PV, respectively (Gong et al. ). In the case of rice, PHS has been reported as a complex and polygenic trait.…”

Section: Discussionmentioning

confidence: 96%

Identification of two major quantitative trait locus for fresh seed dormancy using the diversity arrays technology and diversity arrays technology‐seq based genetic map in Spanish‐type peanuts

et al. 2016

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Seed quality for both germination in the next generation and for human consumption is adversely affected due to preharvest sprouting in peanut. It also makes seeds more vulnerable to infection by a number of pathogens. Therefore, it is desirable to have 2-3 weeks of fresh seed dormancy (FSD) in the peanut varieties. In this context, one F 2 population was developed from a cross between non-dormant (ICGV 00350) and dormant (ICGV 97045) genotypes. Phenotyping of this population showed control of the trait by two recessive genes. In parallel, genotyping of the population with Diversity Arrays Technology (DArT) and DArT-seq markers provided a genetic map with 1152 loci covering a map distance of 2423.12 cM and map density of 2.96 cM/loci. Quantitative trait locus (QTL) analysis identified two major QTLs, namely qfsd-1 and qfsd-2 explaining 22.14% and 71.21% of phenotypic variation, respectively. These QTLs, after validation in different genetic backgrounds, may be useful for molecular breeding for FSD in peanut.

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Seed dormancy in barley is dictated by genetics, environments and their interactions

Cited by 17 publications

References 31 publications

Early growth stages salinity stress tolerance in CM72 x Gairdner doubled haploid barley population

Early growth stages salinity stress tolerance in CM72 x Gairdner doubled haploid barley population

Novel loci and a role for nitric oxide for seed dormancy and preharvest sprouting in barley

Identification of two major quantitative trait locus for fresh seed dormancy using the diversity arrays technology and diversity arrays technology‐seq based genetic map in Spanish‐type peanuts

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