Quantitative genetic analysis of embryo heterosis in faba bean (Vicia faba L.)

Dieckmann, Simon; Link, Wolfgang

doi:10.1007/s00122-009-1057-7

Cited by 11 publications

(15 citation statements)

References 24 publications

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“…10% (Table 1). This finding indicates mid‐parent heterosis for mature seed weight as has been shown in similar experiments (Dieckmann and Link, 2010).…”

Section: Resultssupporting

confidence: 88%

“…We used faba bean as a model, as it produces large seeds and is a partially allogamous crop (Link, 1990), intermediate between selfers and outcrossers. It was recently shown that faba bean embryo heterosis is reflected in mature seed weight and responds to parental genetic relatedness (Dieckmann and Link, 2010). The assessment of embryo heterosis is hampered because homozygous seeds of the male parent cannot develop together with hybrid and homozygous seeds of the female parent on the same plant.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hybrid embryos of Vicia faba develop enhanced sink strength, which is established during early development

et al. 2011

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SUMMARYSelfed and crossed seeds of two homozygous Vicia faba lines served as models for the analysis of the physiological and molecular mechanisms underlying embryo heterosis. Profiles of transcripts, metabolites and seed contents of developing embryos were analysed to compare the means of reciprocally crossed and selfed seeds growing on the same mother plants. The mean weight of mature hybrid seeds was demonstrably higher, revealing mid-parent heterosis. Hybrid embryos exhibited a prolonged early phase of development and delayed onset of storage activity. Accordingly, transcript profiling indicates stimulation of cell proliferation, an effect, which is potentially mediated by activation of auxin functions within a framework of growth-related transcription factors. At the transcript level, activated cell proliferation increased assimilate uptake activity and thereby seed sink strength. This situation might finally lead to the increased size of the hybrid seeds. We conclude that hybrid seeds are characterised by accelerated growth during early development, which increases storage capacity and leads to higher metabolic fluxes. These needs are, at least partially, met by increased assimilate uptake capacity. The stimulated growth of hybrid seeds shifted metabolite profiles and potentially depleted available pools. Such metabolic shifts are most likely secondary effects resulting from the higher storage capacity of hybrid seeds, a heterotic feature, which is itself established very early in seed development.

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“…10% (Table 1). This finding indicates mid‐parent heterosis for mature seed weight as has been shown in similar experiments (Dieckmann and Link, 2010).…”

Section: Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

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Hybrid embryos of Vicia faba develop enhanced sink strength, which is established during early development

et al. 2011

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“…Heterosis has been reported to be present in developing embryos of maize hybrids (Meyer et al ., ; Jahnke et al ., ) and in mature embryos of Vicia faba hybrids (Dieckmann and Link, ). In Arabidopsis, increased seed weight is displayed in hybrids derived from certain ecotypes (Barth et al ., ).…”

Section: Discussionmentioning

confidence: 99%

Early changes of gene activity in developing seedlings of Arabidopsis hybrids relative to parents may contribute to hybrid vigour

et al. 2016

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Hybrid vigour (heterosis) has been used for decades in crop industries, especially in the production of maize and rice. Hybrid varieties usually exceed their parents in plant biomass and seed yield. But the molecular basis of hybrid vigour is not fully understood. In this project, we studied heterosis at early stages of seedling development in Arabidopsis hybrids derived from crossing Ler and C24 accessions. We found that early heterosis is associated with non-additive gene expression that resulted from earlier changes in gene expression in the hybrids relative to the parents. The non-additively expressed genes are involved in metabolic pathways, including photosynthesis, critical for plant growth. The early increased expression levels of genes involved in energy production in hybrids is associated with heterosis in the young seedlings that could be essential for biomass heterosis at later developmental stages of the plant.

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“…Embryos may have genes and genotypes differing from their parents as well as show their own degree of heterozygosity and heterosis. Embryos contribute significantly to variation of both mature seed weight and juvenile biomass midparent heterosis in faba bean (Dieckmann and Link 2010). Paternal differences account for seed weight hybrid vigor, while juvenile biomass heterosis depends on parents' unrelatedness.…”

Section: Understanding Hybrid Vigor In Model Plants and Cropsmentioning

confidence: 99%

Heterosis and Interspecific Hybridization

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2015

Plant Breeding in the Omics Era

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Quantitative genetic analysis of embryo heterosis in faba bean (Vicia faba L.)

Cited by 11 publications

References 24 publications

Hybrid embryos of Vicia faba develop enhanced sink strength, which is established during early development

Hybrid embryos of Vicia faba develop enhanced sink strength, which is established during early development

Early changes of gene activity in developing seedlings of Arabidopsis hybrids relative to parents may contribute to hybrid vigour

Heterosis and Interspecific Hybridization

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