Identification of QTL for barley grain size

Wang, Junmei; Wu, Xingxin; Yue, Wenhao; Zhao, Chenchen; Yang, Jianming; Zhou, Meixue

doi:10.7717/peerj.11287

Cited by 12 publications

(10 citation statements)

References 55 publications

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“…Crop yield could be dissected into several components: number of ears per ha, grain number per ear and thousand-grain weight. So far, many genes or QTL related to grain yield and yield components have been reported in barley [30][31][32][33][34][35][36][37]. However, relatively fewer QTL were reported in barley for net photosynthetic rate and leaf morphological traits [38][39][40][41] compared with rice [42][43][44][45][46] and wheat [28,29,[47][48][49][50][51].…”

Section: Introductionmentioning

confidence: 99%

A new major QTL for flag leaf thickness in barley (Hordeum vulgare L.)

et al. 2022

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Background Carbohydrate accumulation of photosynthetic organs, mainly leaves, are the primary sources of grain yield in cereals. The flag leaf plays a vital role in seed development, which is probably the most neglected morphological characteristic during traditional selection processes. Results In this experiment, four flag leaf morphological traits and seven yield-related traits were investigated in a DH population derived from a cross between a wild barley and an Australian malting barley cultivar. Flag leaf thickness (FLT) showed significantly positive correlations with grain size. Four QTL, located on chromosomes 1H, 2H, 3H, and 5H, respectively, were identified for FLT. Among them, a major QTL was located on chromosome 3H with a LOD value of 18.4 and determined 32% of the phenotypic variation. This QTL showed close links but not pleiotropism to the previously reported semi-dwarf gene sdw1 from the cultivated barley. This QTL was not reported before and the thick leaf allele from the wild barley could provide a useful source for improving grain yield through breeding. Conclusions Our results also provided valuable evidence that source traits and sink traits in barley are tightly connected and suggest further improvement of barley yield potential with enhanced and balanced source and sink relationships by exploiting potentialities of the wild barley resources. Moreover, this study will provide a novel sight on understanding the evolution and development of leaf morphology in barley and improving barley production by rewilding for lost superior traits during plant evolution.

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Section: Introductionmentioning

confidence: 99%

A new major QTL for flag leaf thickness in barley (Hordeum vulgare L.)

et al. 2022

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“…However, landraces that evolved from natural and human selection might still be a significant source of positive genetic diversity (Casañas et al , 2017). To this date, linkage mapping studies for grain size in barley were limited to genetic crosses between cultivars or cultivars and wild relatives (Zhou et al , 2016; Sharma et al , 2018; Wang et al , 2019, 2021; Watt et al , 2019, 2020). The parental inbreds of the HvDRR population, however, comprised 12 barley landraces and 11 cultivars.…”

Section: Discussionmentioning

confidence: 99%

“…Wang et al (2019) identified 27 QTL hotspots (common QTLs shared between the characters) for eight-grain size parameters in a double-haploid population. Recently, in a double-haploid population, Wang et al (2021) also detected four and three QTLs for GL and GW.…”

Section: Introductionmentioning

confidence: 96%

The double round-robin population unravels the genetic architecture of grain size in barley

Shrestha

Cosenza

Inghelandt

et al. 2022

Preprint

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Grain number, size and weight primarily determine the yield of barley. Although the genes regulating grain number are well studied in barley, the genetic loci and the causal gene for sink capacity are poorly understood. Therefore, the primary objective of our work was to dissect the genetic architecture of grain size and weight in barley. We used a multi-parent population developed from a genetic cross between 23 diverse barley inbreds in a double round-robin design. Seed size-related parameters such as grain length, grain width, grain area and thousand-grain weight were evaluated in the HvDRR population comprising 45 recombinant inbred line sub-populations. We found significant genotypic variation for all seed size characters and observed 84 % or higher heritability across four environments. The results of the quantitative trait locus (QTL) detection indicate that the genetic architecture of grain size is more complex than reported previously. In addition, both cultivars and landraces contributed positive alleles at grain size QTLs. Candidate genes identified using genome-wide variant calling data for all parental inbred lines indicated overlapping and potential novel regulators of grain size in cereals. Furthermore, our results indicated that sink capacity was the primary determinant of grain weight in barley.HighlightMulti parent population uncovered the natural allelic series across quantitative loci associated with grain size and weight that will contribute to identifying causal genes and yield improvement in barley.

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“…Only a few mapping studies were performed to identify the genetic factors controlling grain size-related characters in barley. Among them, some studies used bi-parental populations to identify genomic loci associated with grain size characters such as GL, GW, grain area (GA) and thousand-grain weight (TGW; Walker et al , 2013 ; Zhou et al , 2016 ; Wang et al ., 2019 , 2021 ; Watt et al ., 2019 , 2020 ). Several common QTLs for grain size characters, such as GL, TGW, GW, GW/GL ratio, and GA, were identified in a European barley cultivar association panel ( Xu et al , 2018 ).…”

Section: Introductionmentioning

confidence: 99%

The double round-robin population unravels the genetic architecture of grain size in barley

Shrestha

Cosenza

Inghelandt

et al. 2022

Journal of Experimental Botany

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Grain number, size and weight primarily determine the yield of barley. Although the genes regulating grain number are well studied in barley, the genetic loci and the causal gene for sink capacity are poorly understood. Therefore, the primary objective of our work was to dissect the genetic architecture of grain size and weight in barley. We used a multi-parent population developed from a genetic cross between 23 diverse barley inbreds in a double round-robin design. Seed size-related parameters such as grain length, grain width, grain area and thousand-grain weight were evaluated in the HvDRR population comprising 45 recombinant inbred line sub-populations. We found significant genotypic variation for all seed size characters and observed 84 % or higher heritability across four environments. The quantitative trait locus (QTL) detection results indicate that the genetic architecture of grain size is more complex than reported previously. In addition, both cultivars and landraces contributed positive alleles at grain size QTLs. Candidate genes identified using genome-wide variant calling data for all parental inbred lines indicated overlapping and potential novel regulators of grain size in cereals. Furthermore, our results indicated that sink capacity was the primary determinant of grain weight in barley.

show abstract

Identification of QTL for barley grain size

Cited by 12 publications

References 55 publications

A new major QTL for flag leaf thickness in barley (Hordeum vulgare L.)

A new major QTL for flag leaf thickness in barley (Hordeum vulgare L.)

The double round-robin population unravels the genetic architecture of grain size in barley

The double round-robin population unravels the genetic architecture of grain size in barley

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