Genome-wide association of stem carbohydrate accumulation and remobilization during grain growth in bread wheat (Triticum aestivum L.) in mediterranean environments

Guerra, Fernando P.; Yañez-Alegría, Alejandra; Matus, Iván A.; Del Pozo, Alejandro

Mostrar el registro sencillo de la publicación

dc.contributor.author	Guerra, Fernando P.
dc.contributor.author	Yañez-Alegría, Alejandra
dc.contributor.author	Matus, Iván A.
dc.contributor.author	Del Pozo, Alejandro
dc.date.accessioned	2021-12-14T12:24:06Z
dc.date.available	2021-12-14T12:24:06Z
dc.date.issued	2021
dc.identifier.uri	http://repositorio.ucm.cl/handle/ucm/3577
dc.description.abstract	Water deficit represents an important challenge for wheat production in many regions of the world. Accumulation and remobilization of water-soluble carbohydrates (WSCs) in stems are part of the physiological responses regulated by plants to cope with water stress and, in turn, determine grain yield (GY). The genetic mechanisms underlying the variation in WSC are only partially understood. In this study, we aimed to identify Single Nucleotide Polymorphism (SNP) markers that account for variation in a suite of WSC and GY, evaluated in 225 cultivars and advanced lines of spring wheat. These genotypes were established in two sites in the Mediterranean region of Central Chile, under water-limited and full irrigation conditions, and assessed in two growing seasons, namely anthesis and maturity growth periods. A genome-wide association study (GWAS) was performed by using 3243 SNP markers. Genetic variance accounted for 5 to 52% of phenotypic variation of the assessed traits. A rapid linkage disequilibrium decay was observed across chromosomes (r 2 ≤ 0.2 at 2.52 kbp). Marker-trait association tests identified 96 SNPs related to stem weight (SW), WSCs, and GY, among other traits, at the different sites, growing seasons, and growth periods. The percentage of SNPs that were part of the gene-coding regions was 34%. Most of these genes are involved in the defensive response to drought and biotic stress. A complimentary analysis detected significant effects of different haplotypes on WSC and SW, in anthesis and maturity. Our results evidence both genetic and environmental influence on WSC dynamics in spring wheat. At the same time, they provide a series of markers suitable for supporting assisted selection approaches and functional characterization of genes.	es_CL
dc.language.iso	en	es_CL
dc.rights	Atribución-NoComercial-SinDerivadas 3.0 Chile	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/cl/	*
dc.source	Plants, 10(3), 539	es_CL
dc.subject	Carbohydrate distribution	es_CL
dc.subject	Water deficit	es_CL
dc.subject	Grain filling	es_CL
dc.subject	Wheat breeding	es_CL
dc.subject	Genome	es_CL
dc.subject	Mediterranean climate	es_CL
dc.title	Genome-wide association of stem carbohydrate accumulation and remobilization during grain growth in bread wheat (Triticum aestivum L.) in mediterranean environments	es_CL
dc.type	Article	es_CL
dc.ucm.facultad	Facultad de Ciencias Agrarias y Forestales	es_CL
dc.ucm.indexacion	Scopus	es_CL
dc.ucm.indexacion	Isi	es_CL
dc.ucm.uri	www.mdpi.com/2223-7747/10/3/539	es_CL
dc.ucm.doi	doi.org/10.3390/plants10030539	es_CL