Fecha/hora: 06/06/2024 14:42:58

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	21/07/2023	
Fecha de la última actualización: 	21/07/2023	
Autoria: 	QUEZADA, M.; GIORELLO, F.; DA SILVA, C.; AGUILAR, I.; BALMELLI, G.	
Afiliación: 	MARIANELLA FERNANDA QUEZADA MACCHIAVELLO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; Laboratorio de Biotecnología, Departamento de Biología Vegetal, Facultad de Agronomía, Universidad de la República, Montevideo, Uruguay; FACUNDO MATÍAS GIORELLO, PDU Espacio de Biología Vegetal del Noreste, sede Tacuarembó, CENUR Noreste, Universidad de la República, Tacuarembó, Uruguay; CECILIA CORINA DA SILVA, PDU Espacio de Biología Vegetal del Noreste, sede Tacuarembó, CENUR Noreste, Universidad de la República, Tacuarembó, Uruguay; IGNACIO AGUILAR GARCIA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; GUSTAVO DANIEL BALMELLI HERNANDEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.	
Título: 	Single-step genome-wide association study for susceptibility to Teratosphaeria nubilosa and precocity of vegetative phase change in Eucalyptus globulus.	
Complemento del título: 	Original Research article. Sec. Plant Breeding.	
Año de publicación: 	2023	
Fuente/Imprenta: 	Frontiers in Plant Science. 2023, Volume 14, 1124768. https://doi.org/10.3389/fpls.2023.1124768  -- OPEN ACCESS.	
DOI: 	10.3389/fpls.2023.1124768	
Idioma: 	Inglés	
Notas: 	Article history: Received 15 December 2022; Accepted 24 May 2023; Published 03 July 2023. -- Correspondence auhtor: Gustavo Balmelli
gbalmelli@inia.org.uy -- Edited by: Shixiao Yu, Sun Yat-sen University, China. -- Reviewed by: Paulino Pérez-Rodríguez, Colegio de Postgraduados (COLPOS), Mexico; Sanushka Naidoo, University of Pretoria, South Africa. -- FUNDING: This work was supported by the Instituto Nacional de Investigación Agropecuaria (INIA). MQ received a postdoctoral fellowship from INIA. -- SUPPLEMENTARY MATERIAL: The Supplementary Material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/fpls.2023.1124768/full#supplementary-material  -- LICENSE: This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY) (http://creativecommons.org/licenses/by/4.0/ )	
Contenido: 	Mycosphaerella leaf disease (MLD) is one of the most prevalent foliar diseases of E. globulus plantations around the world. Since resistance management strategies have not been effective in commercial plantations, breeding to develop more resistant genotypes is the most promising strategy. Available genomic information can be used to detect genomic regions associated with resistance to MLD, which could significantly speed up the process of genetic improvement. In this study, we investigated the genetic basis of MLD resistance in a breeding population of E. globulus which was genotyped with the EUChip60K SNP array. Resistance to MLD was evaluated for resistance of the juvenile foliage, as defoliation and leaf spot severity, and for precocity of change to resistant adult foliage. Genome-wide association studies (GWAS) were carried out applying four Single-SNP models, a Genomic Best Linear Unbiased Prediction (GBLUP-GWAS) approach, and a Single-step genome-wide association study (ssGWAS). The Single-SNP and GBLUP-GWAS models detected 13 and 16 SNP-trait associations in chromosomes 2, 3 y 11; whereas the ssGWAS detected 66 SNP-trait associations in the same chromosomes, and additional significant SNP-trait associations in chromosomes 5 to 9 for the precocity of phase change (proportion of adult foliage). For this trait, the two main regions in chromosomes 3 and 11 were identified for the three approaches. The SNPs identified in these regions were positioned near the key miRNA genes, miR156.5 and miR157.4, which have a main role in the regulation of the timing of vegetative change, and also in the response to environmental stresses in plants. Our results outlined that ssGWAS was more powerful in detecting regions that affect resistance than conventional GWAS approaches. Additionally, suggest a polygenic genetic architecture for the heteroblastic transition in E. globulus and identified useful SNP markers for the development of marker-assisted selection strategies for resistance. 
Copyright © 2023 Quezada, Giorello, Da Silva, Aguilar and Balmelli.	
Palabras-Clave: 	Genome-wide association study (GWAS); Heteroblastic transition; Leaf disease; Single-step genome-wide association study (ssGWAS).	
Thesagro: 	EUCALYPTUS.	
Categoría del tema: 	A50 Investigación agraria	
URL: 	https://www.frontiersin.org/articles/10.3389/fpls.2023.1124768/pdf	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (103609-1) - PXI - AP - DD - Frontiers in Plant Science/2023 -  -  - DIS