Abstract:
Wheat, the world's most consumed cereal, became a staple food following its cultivation during the Neolithic Revolution when agriculture replaced hunting and gathering. In recent decades, wheat's genetic diversity has declined, but synthetic hexaploid wheat offers a way to reintroduce traits from wild relatives. Though less agronomically appealing, it provides valuable resilience to biotic and abiotic stresses. Genome-wide association studies (GWAS) have identified genes linked to quality, stress resistance, and yield traits, enabling the detection of marker-trait associations in various crops. In this study, agronomic data for 55genotypes were collected under both drought and well-watered conditions, followed by genotyping with 4,449 DArT markers. Population structure was analyzed using STRUCTURE software, and marker-trait associations for traits like root dry weight, shoot dry weight, root-shoot ratio, and chlorophyll content were identified using the GAPIT R package. The agronomic data revealed that some synthetic hexaploid wheat (SHW) genotypes outperformed check varieties under both drought and well-watered conditions. Five DArT markers; wPt-667820, wPt-3677, wPt-2652, wPt-666656 and wPt-731831 highly associated with root dry weight under drought stress and one marker wPt-731269 for root dry weight under well-watered conditions. Two markers wPt-667820, wPt-743102 were in association with shoot dry weight under well-watered condition. For root shoot ratio under drought 3 markers; wPt-2416, wPt-2559, wPt-731831were found associated. For chlorophyll content we found four markers wPt-5184, wPt-2741, wPt-664603, wPt-664811 and two markers wPt-733067, wPt-4242 were found associated with chlorophyll content under well-watered condition. These markers require further validation before they can be used to identify the targeted traits. It is recommended that genotypes exhibiting strong drought resistance be incorporated into breeding programs to enhance resilience in wheat cultivation.
Page(s):
103-103
DOI:
DOI not available
Published:
Journal: 1st International Conference on "Recent Advances in Green Biotechnology and Climate Resilience", September 15-16, 2025, Volume: 1, Issue: 1, Year: 2025
Keywords:
Synthetic hexaploid wheat
,
structure
,
GWAS
,
GAPIT
,
DArT