Detection of quantitative trait loci associated with drought tolerance in St. Augustinegrass
| Autor: | Jessica M. Brown, Xingwang Yu, Esdras M. Carbajal, Sydney E. Graham, Maria C. Zuleta, Susana R. Milla-Lewis |
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| Rok vydání: | 2019 |
| Předmět: |
Chlorophyll
Pigments 0106 biological sciences 0301 basic medicine Germplasm Leaves Chloroplasts Genetic Linkage Stenotaphrum Plant Science 01 natural sciences Plant Resistance to Abiotic Stress Natural Resources Materials education.field_of_study Multidisciplinary Ecology biology Plant Anatomy Chromosome Mapping food and beverages Droughts Phenotype Plant Physiology Physical Sciences Water Resources Trait Medicine Cellular Structures and Organelles Cellular Types Research Article Genotype Drought Adaptation Plant Cell Biology Science Quantitative Trait Loci Materials Science Drought tolerance Population Quantitative trait locus Poaceae Research and Analysis Methods Molecular Genetics 03 medical and health sciences Plant-Environment Interactions Plant Cells Genetics Plant Defenses Molecular Biology Techniques Linkage Mapping education Molecular Biology Organic Pigments Plant Ecology Ecology and Environmental Sciences Gene Mapping fungi Biology and Life Sciences Wilting Cell Biology Phenotypic trait Plant Pathology biology.organism_classification Plant Leaves 030104 developmental biology Agronomy Genetic Loci 010606 plant biology & botany |
| Zdroj: | PLoS ONE, Vol 14, Iss 10, p e0224620 (2019) PLoS ONE |
| ISSN: | 1932-6203 |
| Popis: | St. Augustinegrass (Stenotaphrum secundatum) is a warm-season grass species commonly utilized as turf in the southeastern US. Improvement in the drought tolerance of St. Augustinegrass has significant value within the turfgrass industry. Detecting quantitative trait loci (QTL) associated with drought tolerance will allow for advanced breeding strategies to identify St. Augustinegrass germplasm with improved performance for this trait. A multi-year and multi-environment study was performed to identify QTL in a ‘Raleigh’ x ‘Seville’ mapping population segregating for phenotypic traits associated with drought tolerance. Phenotypic data was collected from a field trial and a two-year greenhouse study, which included relative water content (RWC), chlorophyll content (CHC), leaf firing (LF), leaf wilting (LW), green cover (GC) and normalized difference vegetative index (NDVI). Significant phenotypic variance was observed and a total of 70 QTL were detected for all traits. A genomic region on linkage group R6 simultaneously harbored QTL for RWC, LF and LW in different experiments. In addition, overlapping QTL for GC, LF, LW and NDVI were found on linkage groups R1, R5, R7 and S2. Sequence alignment analysis revealed several drought response genes within these regions. The QTL identified in this study have potential to be used in the future to identify genes associated with drought tolerance and for use in marker-assisted breeding. |
| Databáze: | OpenAIRE |
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