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GrainGenes Reference Report: CRC-52-1731

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Reference	CRC-52-1731
Title	Genome wide association study of Ethiopian barley for terminal drought stress tolerance under field and climate chamber conditions
Journal	Cereal Research Communications
Year	2024
Volume	52
Pages	1731-1759
Author	Teklemariam SS [ Show all 6 ]
Abstract	In order to detect markers for drought stress tolerance, field experiments in Ethiopia were conducted for three years at two naturally drought-prone locations and two optimum moisture locations using 239 Ethiopian barley landraces and 21 barley breeding lines. Furthermore, a climate chamber experiment applying drought stress at different water regimes (70% soil water capacity (WC) for control and 20% WC for drought stress conditions) after flowering was conducted for selected 196 accessions. Results revealed reduced grain biomass by 47% and 80% under field and climate chamber conditions, respectively, as well as significantly (p < 0.05) reduced days to maturity and plant height, in both experimental designs. Based on 10,644 SNP markers, GWAS was conducted to identify marker trait associations (MTA) for drought stress tolerance. For days to maturity, relative chlorophyll content, plant height, number of seeds per spike, thousand kernel weight, and harvest index under field and climate chamber drought stress treatments, 58 significant MTAs were identified. In total, 41.4% of the MTAs were located on chromosome 2H, of which one is very close to the Ppd-H1 flowering locus. These findings underpin the importance of this genome region for drought tolerance. Another MTA on chromosome 1H was detected for days to maturity under field drought stress treatment in the vicinity of the known flowering time ELF3 gene. Additionally, 13 and 3 Ethiopian landraces that tolerate severe and moderate drought stress in climate chamber and field experiments were identified, respectively, using drought indices. The results highlight the tolerance of Ethiopian landraces to different levels of drought stress as well as their potential to be considered in future barley improvement programs.
External Databases	https://doi.org/10.1007/s42976-023-00472-5
QTL	[ Hide all but 1 of 84 ] FCDM1 FSPH1 FCSPAD1 FCPH1 FSHI1 FSSPAD1 CSPH1 CSTKW1 CCDM1 CCHI1 CCGB1 CCTKW1 FSDM1 CSDM1 CSNSdPS1 CSHI1 CCTKW2 FCDM2 CCDM2 CSHI2 CSGB1 FCTKW1 CSNSdPS2 CCTKW3 CCPH1 CSHI3 FSPH2 FSTKW1 FSNSdPS1 CSGB2 FCNSdPS1 FCTKW2 FCTKW3 FCNSdPS2 FSTKW2 CCTKW4 FSTKW3 CSPH2 CSHI4 FCTKW4 CSHI5 FSHI2 FSNSdPS2 CSTKW2 CSNSdPS3 FCNSdPS3 CSNSdPS4 CSGB3 CSSPAD1 FCGB1 FCPH2 FSNSdPS3 FCNSdPS4 FCGB2 CSGB4 FCGB3 FSPH3 FCPH3 FCGB4 CSHI6 FCGB5 FCSPAD2 FSDM2 FCTKW5 CSDM2 CCSPAD1 FCNSdPS5 FSNSdPS4 CSDM3 FSSPAD2 FCGB6 CCTKW5 CSPH3 FSGB1 FSNSdPS5 FSDM3 FSGB2 CSTKW3 CSSPAD2 FSDM4 FSGB3 CSHI7 FSDM5 CSTKW4

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