TY - JOUR
T1 - Hotspots in the genomic architecture of field drought responses in wheat as breeding targets
AU - IWGSC
AU - Gálvez, Sergio
AU - Mérida-García, Rosa
AU - Camino, Carlos
AU - Borrill, Philippa
AU - Abrouk, Michael
AU - Ramírez-González, Ricardo H
AU - Biyiklioglu, Sezgi
AU - Amil-Ruiz, Francisco
AU - Dorado, Gabriel
AU - Budak, Hikmet
AU - Gonzalez-Dugo, Victoria
AU - Zarco-Tejada, Pablo J
AU - Appels, Rudi
AU - Uauy, Cristobal
AU - Hernandez, Pilar
PY - 2018/11/16
Y1 - 2018/11/16
N2 - Wheat can adapt to most agricultural conditions across temperate regions. This success is the result of phenotypic plasticity conferred by a large and complex genome composed of three homoeologous genomes (A, B, and D). Although drought is a major cause of yield and quality loss in wheat, the adaptive mechanisms and gene networks underlying drought responses in the field remain largely unknown. Here, we addressed this by utilizing an interdisciplinary approach involving field water status phenotyping, sampling, and gene expression analyses. Overall, changes at the transcriptional level were reflected in plant spectral traits amenable to field-level physiological measurements, although changes in photosynthesis-related pathways were found likely to be under more complex post-transcriptional control. Examining homoeologous genes with a 1:1:1 relationship across the A, B, and D genomes (triads), we revealed a complex genomic architecture for drought responses under field conditions, involving gene homoeolog specialization, multiple gene clusters, gene families, miRNAs, and transcription factors coordinating these responses. Our results provide a new focus for genomics-assisted breeding of drought-tolerant wheat cultivars.
AB - Wheat can adapt to most agricultural conditions across temperate regions. This success is the result of phenotypic plasticity conferred by a large and complex genome composed of three homoeologous genomes (A, B, and D). Although drought is a major cause of yield and quality loss in wheat, the adaptive mechanisms and gene networks underlying drought responses in the field remain largely unknown. Here, we addressed this by utilizing an interdisciplinary approach involving field water status phenotyping, sampling, and gene expression analyses. Overall, changes at the transcriptional level were reflected in plant spectral traits amenable to field-level physiological measurements, although changes in photosynthesis-related pathways were found likely to be under more complex post-transcriptional control. Examining homoeologous genes with a 1:1:1 relationship across the A, B, and D genomes (triads), we revealed a complex genomic architecture for drought responses under field conditions, involving gene homoeolog specialization, multiple gene clusters, gene families, miRNAs, and transcription factors coordinating these responses. Our results provide a new focus for genomics-assisted breeding of drought-tolerant wheat cultivars.
U2 - 10.1007/s10142-018-0639-3
DO - 10.1007/s10142-018-0639-3
M3 - Article
C2 - 30446876
SN - 1438-793X
JO - Functional and Integrative Genomics
JF - Functional and Integrative Genomics
ER -