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Natural variation in timing of stress-responsive gene expression predicts heterosis in intraspecific hybrids of Arabidopsis

Miller, Marisa ; Song, Qingxin ; Shi, Xiaoli ; Juenger, Thomas E ; Chen, Z Jeffrey

Nature communications, 2015-07, Vol.6 (1), p.7453-7453, Article 7453 [Periódico revisado por pares]

England: Nature Publishing Group

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Natural variation in timing of stress-responsive gene expression predicts heterosis in intraspecific hybrids of Arabidopsis
Autor: Miller, Marisa ; Song, Qingxin ; Shi, Xiaoli ; Juenger, Thomas E ; Chen, Z Jeffrey
Assuntos: Abiotic stress ; Arabidopsis - genetics ; Arabidopsis - metabolism ; Arabidopsis Proteins - genetics ; Arabidopsis Proteins - metabolism ; Biology ; Biomass ; Circadian rhythm ; Circadian Rhythm - physiology ; Crops ; DNA methylation ; Epigenesis, Genetic ; Gene expression ; Gene Expression Regulation, Plant - physiology ; Genomes ; Hybrid Vigor - genetics ; Hybrid Vigor - physiology ; Hybridization, Genetic ; Stress, Physiological - physiology
É parte de: Nature communications, 2015-07, Vol.6 (1), p.7453-7453, Article 7453
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: The genetic distance between hybridizing parents affects heterosis; however, the mechanisms for this remain unclear. Here we report that this genetic distance correlates with natural variation and epigenetic regulation of circadian clock-mediated stress responses. In intraspecific hybrids of Arabidopsis thaliana, genome-wide expression of many biotic and abiotic stress-responsive genes is diurnally repressed and this correlates with biomass heterosis and biomass quantitative trait loci. Expression differences of selected stress-responsive genes among diverse ecotypes are predictive of heterosis in their hybrids. Stress-responsive genes are repressed in the hybrids under normal conditions but are induced to mid-parent or higher levels under stress at certain times of the day, potentially balancing the tradeoff between stress responses and growth. Consistent with this hypothesis, repression of two candidate stress-responsive genes increases growth vigour. Our findings may therefore provide new criteria for effectively selecting parents to produce high- or low-yield hybrids.
Editor: England: Nature Publishing Group
Idioma: Inglês

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Natural variation in timing of stress-responsive gene expression predicts heterosis in intraspecific hybrids of Arabidopsis

Miller, Marisa ; Song, Qingxin ; Shi, Xiaoli ; Juenger, Thomas E ; Chen, Z Jeffrey

England: Nature Publishing Group

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