Multi-environment QTL analysis using an updated genetic map of a widely distributed Seri × Babax spring wheat population
Visualitza/Obre
Autor/a
Liu, Caiyun
Khodaee, Mehdi
Sansaloni, Carolina
Dreisigacker, Susanne
Sukumaran, Sivakumar
Reynolds, Matthew
Data de publicació
2019-08-30ISSN
1380-3743
Resum
Seri/Babax spring wheat RIL population was developed to minimize the confounding effect of phenology in the genetic dissection of abiotic stress traits. An existing linkage map (< 500 markers) was updated with 6470 polymorphic Illumina iSelect 90K array and DArTseq SNPs to a genetic map of 5576.5 cM with 1748 non-redundant markers (1165 90K SNPs, 207 DArTseq SNPs, 183 AFLP, 111 DArT array, and 82 SSR) assigned to 31 linkage groups. We conducted QTL mapping for yield and related traits phenotyped in several major wheat growing areas in Egypt, Sudan, Iran, India, and Mexico (nine environments: heat, drought, heat plus drought, and yield potential). QTL analysis identified 39 (LOD 2.5–23.6; PVE 4.8–21.3%), 36 (LOD 2.5–15.4; PVE 2.9–21.4%), 30 (LOD 2.5–13.1; PVE 3.6–26.8%), 39 (LOD 2.7–14.4; PVE 2.6–15.9%), and 22 (LOD 2.8–4.8; PVE 6.8–12.9%) QTLs for grain yield, thousand-grain weight, grain number, days to heading, and plant height, respectively. The present study confirmed QTLs from previous studies and identified novel QTLs. QTL analysis based on high-yielding and low-yielding environmental clusters identified 11 QTLs (LOD 2.6–14.9; PVE 2.7–19.7%). The updated map thereby provides a better genome coverage (3.5-fold) especially on the D genome (4-fold), higher density (1.1-fold), and a good collinearity with the IWGSC RefSeq v1.0 genome, and increased the number of detected QTLs (5-fold) compared with the earlier map. This map serves as a useful genomic resource for genetic analyses of important traits on this wheat population that was widely distributed around the world.
Tipus de document
Article
Versió del document
Versió acceptada
Llengua
Anglès
Matèries (CDU)
633 - Cultius i produccions
Pàgines
26
Publicat per
Springer
Publicat a
Molecular Breeding
Citació
Liu, Caiyun, Mehdi Khodaee, Marta S. Lopes, Carolina Sansaloni, Susanne Dreisigacker, Sivakumar Sukumaran, and Matthew Reynolds. 2019. "Multi-Environment QTL Analysis Using An Updated Genetic Map Of A Widely Distributed Seri × Babax Spring Wheat Population". Molecular Breeding 39 (9). doi:10.1007/s11032-019-1040-1.
Programa
Cultius Extensius Sostenibles
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