Background And Aims: Accurately representing development is essential for applying crop simulations to investigate the effects of climate, genotypes or crop management. Development in wheat (Triticum aestivum, T. durum) is primarily driven by temperature, but affected by vernalization and photoperiod, and is often simulated by reducing thermal-time accumulation using vernalization or photoperiod factors or limiting accumulation when a lower optimum temperature (T(optl)) is exceeded. In this study T(optl) and methods for representing effects of vernalization and photoperiod on anthesis were examined using a range of planting dates and genotypes.
Methods: An examination was made of T(optl) values of 15, 20, 25 and 50 degrees C, and either the most limiting or the multiplicative value of the vernalization and photoperiod development rate factors for simulating anthesis. Field data were from replicated trials at Ludhiana, Punjab, India with July through to December planting dates and seven cultivars varying in vernalization response.
Key Results: Simulations of anthesis were similar for T(optl) values of 20, 25 and 50 degrees C, but a T(optl) of 15 degrees C resulted in a consistent bias towards predicting anthesis late for early planting dates. Results for T(optl) above 15 degrees C may have occurred because mean temperatures rarely exceeded 20 degrees C before anthesis for many planting dates. For cultivars having a strong vernalization response, anthesis was more accurately simulated when vernalization and photoperiod factors were multiplied rather than using the most limiting of the two factors.
Conclusions: Setting T(optl) to a high value (30 degrees C) and multiplying the vernalization and photoperiod factors resulted in accurately simulating anthesis for a wide range of planting dates and genotypes. However, for environments where average temperatures exceed 20 degrees C for much of the pre-anthesis period, a lower T(optl) (23 degrees C) might be appropriate. These results highlight the value of testing a model over a wide range of environments.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2701771 | PMC |
| http://dx.doi.org/10.1093/aob/mcn115 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
How to survive mild winters: Cold acclimation, deacclimation, and reacclimation in winter wheat and barley.
Plant Physiol Biochem
January 2025
Laboratory of Plant Stress Biology and Biotechnology, Department of Plant Genetics and Crop Breeding, Czech Agrifood Research Center, Drnovská 507, 161 06, Prague 6, Ruzyně, Czech Republic.
Cold acclimation and vernalization represent the major evolutionary adaptive responses to ensure winter survival of temperate plants. Due to climate change, mild winters can paradoxically worsen plant winter survival due to cold deacclimation induced by warm periods during winter. It seems that the ability of cold reacclimation in overwintering Triticeae cereals is limited, especially in vernalized plants.
View Article and Find Full Text PDFModeling Floral Induction in the Narrow-Leafed Lupin Under Different Environmental Conditions.
Plants (Basel)
December 2024
Mathematical Biology and Bioinformatics Laboratory, Peter the Great Saint Petersburg Polytechnic University, 195251 St. Petersburg, Russia.
Flowering is initiated in response to environmental cues, with the photoperiod and ambient temperature being the main ones. The regulatory pathways underlying floral transition are well studied in but remain largely unknown in legumes. Here, we first applied an in silico approach to infer the regulatory inputs of four -like genes of the narrow-leafed lupin .
View Article and Find Full Text PDFMolecular characterization of a novel photoperiod-insensitive allele Ppd-B1a.3 and its effect on heading date in Chinese wheat (Triticum aestivum) cultivar Qingchun 37.
J Plant Res
December 2024
College of Agronomy, Northwest A & F University, Yangling, 712100, Shaanxi, China.
Breeders adjust wheat heading dates to improve regional adaptability and reduce or mitigate yield losses caused by meteorological disasters, pests and diseases. The Ppd-1 genes play a crucial role in determining wheat sensitivity to changes in day-length and serve as key regulators of heading dates once the vernalization requirement is satisfied. In this study, we identified a new allelic variant of the promoter region, Ppd-B1a.
View Article and Find Full Text PDFHistoric rewiring of grass flowering time pathways and implications for crop improvement under climate change.
New Phytol
December 2024
Department of Plant Biology, University of Vermont, 63 Carrigan Drive, Burlington, VT, 05405, USA.
Grasses are fundamental to human survival, providing a large percentage of our calories, fuel, and fodder for livestock, and an enormous global carbon sink. A particularly important part of the grass plant is the grain-producing inflorescence that develops in response to both internal and external signals that converge at the shoot tip to influence meristem behavior. Abiotic signals that trigger reproductive development vary across the grass family, mostly due to the unique ecological and phylogenetic histories of each clade.
View Article and Find Full Text PDFGenome-wide association study and transcriptome analysis reveal natural variation of key genes regulation flowering time in rapeseed.
Mol Breed
June 2024
College of Agronomy, Hunan Agricultural University, Changsha, 410128 China.
Article Synopsis
- Flowering time in rapeseed is important for yield, oil quality, and plant maturity, driving research into its genetic regulation.
- A genome-wide association study identified 46 haplotype regions related to flowering time, with 28 overlapping known quantitative trait loci.
- Key genes (-A02, -A10, -A09) showed variations linked to flowering time, and co-expression analysis revealed connections with various flowering pathway genes, suggesting a complex regulatory network for breeding early maturing rapeseed varieties.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!