Genetic architecture of flowering phenology in cereals and opportunities for crop improvement
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...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2016-12-01
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| Series: | Frontiers in Plant Science |
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| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fpls.2016.01906/full |
| _version_ | 1818319534602321920 |
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| author | Camilla Beate Hill Chengdao Li |
| author_facet | Camilla Beate Hill Chengdao Li |
| author_sort | Camilla Beate Hill |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-13T10:10:39Z |
| format | Article |
| id | doaj.art-750e328f85164d418a348253698fb85c |
| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-12-13T10:10:39Z |
| publishDate | 2016-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Plant Science |
| spelling | doaj.art-750e328f85164d418a348253698fb85c2022-12-21T23:51:26ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2016-12-01710.3389/fpls.2016.01906229337Genetic architecture of flowering phenology in cereals and opportunities for crop improvementCamilla Beate Hill0Chengdao Li1Murdoch UniversityMurdoch UniversityCereal 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.http://journal.frontiersin.org/Journal/10.3389/fpls.2016.01906/fullMaizeyieldricebarleyflowering timePhenology |
| spellingShingle | Camilla Beate Hill Chengdao Li Genetic architecture of flowering phenology in cereals and opportunities for crop improvement Frontiers in Plant Science Maize yield rice barley flowering time Phenology |
| title | Genetic architecture of flowering phenology in cereals and opportunities for crop improvement |
| title_full | Genetic architecture of flowering phenology in cereals and opportunities for crop improvement |
| title_fullStr | Genetic architecture of flowering phenology in cereals and opportunities for crop improvement |
| title_full_unstemmed | Genetic architecture of flowering phenology in cereals and opportunities for crop improvement |
| title_short | Genetic architecture of flowering phenology in cereals and opportunities for crop improvement |
| title_sort | genetic architecture of flowering phenology in cereals and opportunities for crop improvement |
| topic | Maize yield rice barley flowering time Phenology |
| url | http://journal.frontiersin.org/Journal/10.3389/fpls.2016.01906/full |
| work_keys_str_mv | AT camillabeatehill geneticarchitectureoffloweringphenologyincerealsandopportunitiesforcropimprovement AT chengdaoli geneticarchitectureoffloweringphenologyincerealsandopportunitiesforcropimprovement |