Genome-wide association analysis od senescence-related traits in maize
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Fecha de publicación
2022-12-14ISSN
1661-6596
Resumen
Senescence is a programmed process that involves the destruction of the photosynthesis apparatus and the relocation of nutrients to the grain. Identifying senescence-associated genes is essential to adapting varieties for the duration of the cultivation cycle. A genome-wide association study (GWAS) was performed using 400 inbred maize lines with 156,164 SNPs to study the genetic architecture of senescence-related traits and their relationship with agronomic traits. We estimated the timing of senescence to be 45 days after anthesis in the whole plant and specifically in the husks. A list of genes identified in a previous RNAseq experiment as involved in senescence (core senescence genes) was used to propose candidate genes in the vicinity of the significant SNPs. Forty-six QTLs of moderate to high effect were found for senescence traits, including specific QTLs for husk senescence. The allele that delayed senescence primarily increased grain yield and moisture. Seven and one significant SNPs were found in the coding and promoter regions of eight core senescence genes, respectively. These genes could be potential candidates for generating a new variation by genome editing for functional analysis and breeding purposes, particularly Zm00001d014796, which could be responsible for a QTL of senescence found in multiple studies.
Tipo de documento
Artículo
Versión del documento
Versión publicada
Lengua
Inglés
Materias (CDU)
633 - Cultivos y producciones
Páginas
20
Publicado por
MDPI
Publicado en
International Journal of Molecular Sciences
Citación
Yannam, Venkata Rami Reddy, Marlon Caicedo, Rosa Ana Malvar, and Bernardo Ordás. 2022. "Genome-Wide Association Analysis Of Senescence-Related Traits In Maize". International Journal Of Molecular Sciences 23 (24): 15897. doi:10.3390/ijms232415897.
Número del acuerdo de la subvención
MICIU/Programa Estatal de generación del conocimiento y fortalecimiento científico y tecnológico del sistema I+D+I y Programa Estatal de I+D+I orientada a los retos de la sociedad/PID2019-108127RB-I00/ES/Mejora genética de maíz para resilencia, sostenibilidad y calidad/
Program
Cultius Extensius Sostenibles
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