Breeding for preharvest sprouting (PHS) resistance is of great interest in wheat-growing areas where high rainfall occurs during grain ripening and harvest. We have characterized 32 wheat accessions using 33 microsatellite markers flanking PHS quantitative trait loci (QTLs) previously identified on group 3, 4, 5, and 6 chromosomes of hexaploid wheat. A total of 229 alleles, with an average of 6.94 alleles per marker, were observed among the 32 wheat lines. The polymorphic information content (PIC) was estimated and ranged between 0.25 and 0.90, with an average of 0.67. A cluster analysis revealed 3 main clusters and 3 singlet wheat lines, which is in agreement with pedigree-based relationships, seed coat colour, and origin. Canadian wheat accessions were subdivided into 4 sub-clusters based on pedigree and wheat classes. Grouping of preharvest sprouting germplasm into clusters was consistent with cluster-specific allele diversity observed in the PHS-resistant lines AUS1408, Red-RL4137, White-RL4137, and Kenya321. The implications of these findings in white wheat breeding for PHS tolerance are discussed.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1139/G08-022 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Role of alanine aminotransferase in crop resilience to climate change: a critical review.
Physiol Mol Biol Plants
December 2024
Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, Mumbai, 400085 India.
Article Synopsis
- Alanine aminotransferase (AlaAT) is an important enzyme in plants that influences key processes like preharvest sprouting, stress tolerance, and nitrogen efficiency.
- The review highlights advancements in understanding AlaAT's molecular genetics, including gene cloning related to dormancy, which can impact crop yields and plant physiology.
- Future research and biotechnology strategies, such as genome editing and speed breeding, are expected to enhance the resilience of crop plants against climate change by manipulating AlaAT functions.
Multi-locus genome wide association study uncovers genetics of fresh seed dormancy in groundnut.
BMC Plant Biol
December 2024
Center of Excellence in Genomics & Systems Biology (CEGSB) and Centre for Pre-breeding Research (CPBR), International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, 502324, India.
Pre-harvest sprouting (PHS) in groundnut leads to substantial yield losses and reduced seed quality, resulting in reduced market value of groundnuts. Breeding cultivars with 14-21 days of fresh seed dormancy (FSD) holds promise for precisely mitigating the yield and quality deterioration. In view of this, six multi-locus genome-wide association study (ML-GWAS) models alongside a single-locus GWAS (SL-GWAS) model were employed on a groundnut mini-core collection using multi season phenotyping and 58 K "Axiom_Arachis" array genotyping data.
View Article and Find Full Text PDFPre-Harvest Sprouting Resistance in Bread Wheat: A Speed Breeding Approach to Assess Dormancy QTL in Backcross Lines.
Plants (Basel)
December 2024
Department of Mathematical and Statistical Methods, Poznań University of Life Sciences, Wojska Polskiego 28, 60-637 Poznań, Poland.
In this study, BC1F3:4 generation plants derived from the hybrid crosses of Rio Blanco × Nevzatbey, Rio Blanco × Adana99, and Rio Blanco × line 127 were used as experimental material. These hybrids incorporated QTLs associated with pre-harvest sprouting (PHS) resistance through molecular techniques. Key agronomic traits, including plant height, spike length, the number of grains per spike, grain weight, and physiological maturity, were evaluated in both greenhouse and growth room settings under accelerated growth (speed breeding) conditions.
View Article and Find Full Text PDFDiscovery of 4-(2-Phenylethynyl) benzoic Acid as a Potential Potent Chemical Pruner.
Plant Cell Physiol
December 2024
Key Laboratory of Specialty Agri-Product Quality and Hazard Controlling Technology of Zhejiang, College of Life Sciences, China Jiliang University, Hangzhou 310018, P.R. China.
Rocketing labor cost is a major challenge threatening agricultural sustainability and food security worldwide. The replacement of manual pruning of horticultural plants with chemical pruning has long been a goal for saving cost and reducing virus spreading. Here, guided by the structure-function relationship of allelochemical benzoic acid derivatives, we have identified 4-(2-phenylethynyl)-benzoicacid (PEBA) as a highly bioactive compound.
View Article and Find Full Text PDFThe transcription factor CCT30 promotes rice preharvest sprouting by regulating sugar signalling to inhibit the ABA-mediated pathway.
Plant Biotechnol J
December 2024
National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China.
Article Synopsis
- Seed dormancy helps plants avoid preharvest sprouting in adverse conditions, making it crucial for survival.
- The study identified the gene CCT30 as influential in seed dormancy, with knockout mutants showing increased dormancy and sensitivity to the hormone ABA, while overexpressing plants displayed the opposite traits.
- CCT30 interacts with a transcription factor that negatively regulates seed dormancy, suggesting it promotes preharvest sprouting by boosting sugar signals that inhibit the ABA pathway, indicating its potential for breeding resistant rice 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!