The tae-miR408-Mediated Control of <i>TaTOC1</i> Genes Transcription Is Required for the Regulation of Heading Time in Wheat

Zhao, Xiang; Hong, Po Da; Wu, Ji Yun; Chen, Xiang Bin; Ye, Xing Guo; Pan, Yan; Wang, Jian; Zhang, Xian Sheng

doi:10.1104/pp.15.01216

Cited by 91 publications

(60 citation statements)

References 97 publications

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“…These proteins have been described containing a copper atom, and participate in redox processes [96], with a crucial role in the electron shuttle in plants [97]. In addition, Yao et al [98] described the blue copper protein genes as the targets of miR408 in wheat, which is involved in the regulation of gene transcription required for heading time [99]. In our study SNP620 was also found in proximity to a gene coding for an ubiquinone biosynthesis O-methyltransferase.…”

Section: Discussionsupporting

confidence: 60%

Mapping Agronomic and Quality Traits in Elite Durum Wheat Lines under Differing Water Regimes

et al. 2020

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Final grain production and quality in durum wheat are affected by biotic and abiotic stresses. The association mapping (AM) approach is useful for dissecting the genetic control of quantitative traits, with the aim of increasing final wheat production under stress conditions. In this study, we used AM analyses to detect quantitative trait loci (QTL) underlying agronomic and quality traits in a collection of 294 elite durum wheat lines from CIMMYT (International Maize and Wheat Improvement Center), grown under different water regimes over four growing seasons. Thirty-seven significant marker-trait associations (MTAs) were detected for sedimentation volume (SV) and thousand kernel weight (TKW), located on chromosomes 1B and 2A, respectively. The QTL loci found were then confirmed with several AM analyses, which revealed 12 sedimentation index (SDS) MTAs and two additional loci for SV (4A) and yellow rust (1B). A candidate gene analysis of the identified genomic regions detected a cluster of 25 genes encoding blue copper proteins in chromosome 1B, with homoeologs in the two durum wheat subgenomes, and an ubiquinone biosynthesis O-methyltransferase gene. On chromosome 2A, several genes related to photosynthetic processes and metabolic pathways were found in proximity to the markers associated with TKW. These results are of potential use for subsequent application in marker-assisted durum wheat-breeding programs.

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Section: Discussionsupporting

confidence: 60%

Mapping Agronomic and Quality Traits in Elite Durum Wheat Lines under Differing Water Regimes

et al. 2020

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“…To investigate the expression patterns of wheat ZIM ‐ like genes ( TaZIM‐A1 , TaZIM‐A2 and TaZIM‐A3 ), under different photoperiodic conditions, we performed quantitative reverse‐transcription PCR (qRT‐PCR) analysis, using TIMING OF CAB1 ( TaTOC‐A1 ), a typical circadian rhythm‐regulated gene in wheat, as a control (Zhao et al ). As expected, a very clear circadian rhythm was observed for TaTOC‐A1 expression under LD, SD, constant light (LL) and constant dark (DD) conditions (Figure ).…”

Section: Resultsmentioning

confidence: 99%

TaZIM‐A1 negatively regulates flowering time in common wheat (Triticum aestivum L.)

Tian

Wang

et al. 2018

JIPB

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Flowering time is a critical determinant of regional adaptation for crops and has strong effects on crop yields. Here, we report that TaZIM-A1, an atypical GATA-like transcription factor, is a negative regulator of flowering in wheat. TaZIM-A1 possessed weak transcriptional repression activity, with its CCT domain functioning as the major inhibitory region. TaZIM-A1 expression exhibited a typical circadian oscillation pattern under various light regimes. Overexpression of TaZIM-A1 caused a delay in flowering time and a decrease in thousand-kernel weight (TKW) in wheat under long-day conditions. Moreover, TaZIM-A1 directly bound to the promoters of TaCO-1 and TaFT-1 and downregulated their expression. Sequence analysis of a collection of common wheat cultivars identified three and two haplotypes for TaZIM-A1 and TaZIM-B1, respectively. Association analysis revealed that TaZIM-A1-HapI/-HapIII and TaZIM-B1-HapI have undergone strong positive selection during modern wheat breeding, likely due to their association with earlier heading and higher TKW. Diagnostic markers were developed for these haplotypes that can be used for wheat cultivar improvement, via marker-assisted breeding.

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“…The mRNA of TOC1 starts to accumulate at the beginning and reaching its maximum level at the end of the light period, where it directly represses the transcription of the myeloblastosis (MYB) transcription factors LATE ELONGATED HYPOCOTYL ( LHY ) and CCA1 . In wheat, Zhao et al (2016) recently demonstrated that the microRNA tae-miR408 targets and down-regulates expression levels of all three wheat paralogs of TaTOC1 (TaTOC-A1 , TaTOC-B1 , and TaTOC-D1) under both LDs and SDs, thereby regulating heading time and associated agronomic traits.…”

Section: Flowering Time In Cereal Crops: a Complex Interplay Between mentioning

confidence: 99%

Genetic Architecture of Flowering Phenology in Cereals and Opportunities for Crop Improvement

Hill

2016

Front. Plant Sci.

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Cereal crop species including bread wheat (Triticum aestivum L.), barley (Hordeum vulgare L.), rice (Oryza sativa L.), and maize (Zea mays L.) provide the bulk of human nutrition and agricultural products for industrial use. These four cereals are central to meet future demands of food supply for an increasing world population under a changing climate. A prerequisite for cereal crop production is the transition from vegetative to reproductive and grain-filling phases starting with flower initiation, a key developmental switch tightly regulated in all flowering plants. Although studies in the dicotyledonous model plant Arabidopsis thaliana build the foundations of our current understanding of plant phenology genes and regulation, the availability of genome assemblies with high-confidence sequences for rice, maize, and more recently bread wheat and barley, now allow the identification of phenology-associated gene orthologs in monocots. Together with recent advances in next-generation sequencing technologies, QTL analysis, mutagenesis, complementation analysis, and RNA interference, many phenology genes have been functionally characterized in cereal crops and conserved as well as functionally divergent genes involved in flowering were found. Epigenetic and other molecular regulatory mechanisms that respond to environmental and endogenous triggers create an enormous plasticity in flowering behavior among cereal crops to ensure flowering is only induced under optimal conditions. In this review, we provide a summary of recent discoveries of flowering time regulators with an emphasis on four cereal crop species (bread wheat, barley, rice, and maize), in particular, crop-specific regulatory mechanisms and genes. In addition, pleiotropic effects on agronomically important traits such as grain yield, impact on adaptation to new growing environments and conditions, genetic sequence-based selection and targeted manipulation of phenology genes, as well as crop growth simulation models for predictive crop breeding, are discussed.

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The tae-miR408-Mediated Control of TaTOC1 Genes Transcription Is Required for the Regulation of Heading Time in Wheat

Cited by 91 publications

References 97 publications

Mapping Agronomic and Quality Traits in Elite Durum Wheat Lines under Differing Water Regimes

Mapping Agronomic and Quality Traits in Elite Durum Wheat Lines under Differing Water Regimes

TaZIM‐A1 negatively regulates flowering time in common wheat (Triticum aestivum L.)

Genetic Architecture of Flowering Phenology in Cereals and Opportunities for Crop Improvement

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