@article{fdi:010087656, title = {{G}enome-wide association study in two-row spring barley landraces identifies {QTL} associated with plantlets root system architecture traits in well-watered and osmotic stress conditions}, author = {{K}hodaeiaminjan, {M}. and {K}noch, {D}. and {T}hiaw, {M}. {R}. {N}. and {M}archetti, {C}. {F}. and {K}orinkova, {N}. and {T}echer, {A}. and {N}guyen, {T}. {D}. and {C}hu, {J}. {T}. and {B}ertholomey, {V}. and {D}oridant, {I}. and {G}antet, {P}ascal and {G}raner, {A}. and {N}eumann, {K}. and {B}ergougnoux, {V}.}, editor = {}, language = {{ENG}}, abstract = {{W}ater availability is undoubtedly one of the most important environmental factors affecting crop production. {D}rought causes a gradual deprivation of water in the soil from top to deep layers and can occur at diverse stages of plant development. {R}oots are the first organs that perceive water deficit in soil and their adaptive development contributes to drought adaptation. {D}omestication has contributed to a bottleneck in genetic diversity. {W}ild species or landraces represent a pool of genetic diversity that has not been exploited yet in breeding program. {I}n this study, we used a collection of 230 two-row spring barley landraces to detect phenotypic variation in root system plasticity in response to drought and to identify new quantitative trait loci ({QTL}) involved in root system architecture under diverse growth conditions. {F}or this purpose, young seedlings grown for 21 days in pouches under control and osmotic-stress conditions were phenotyped and genotyped using the barley 50k i{S}elect {SNP} array, and genome-wide association studies ({GWAS}) were conducted using three different {GWAS} methods ({MLM} {GAPIT}, {F}arm{CPU}, and {BLINK}) to detect genotype/phenotype associations. {I}n total, 276 significant marker-trait associations ({MTA}s; p-value ({FDR})< 0.05) were identified for root (14 and 12 traits under osmotic-stress and control conditions, respectively) and for three shoot traits under both conditions. {I}n total, 52 {QTL} (multi-trait or identified by at least two different {GWAS} approaches) were investigated to identify genes representing promising candidates with a role in root development and adaptation to drought stress.}, keywords = {barley landraces ; osmotic stress ; root system architecture ; {GWAS} ; {QTL} ; candidate gene}, booktitle = {}, journal = {{F}rontiers in {P}lant {S}cience}, volume = {14}, numero = {}, pages = {1125672 [19 p.]}, ISSN = {1664-462{X}}, year = {2023}, DOI = {10.3389/fpls.2023.1125672}, URL = {https://www.documentation.ird.fr/hor/fdi:010087656}, }