Fecha/hora: 16/06/2024 04:09:16

Biblioteca(s): | INIA Las Brujas.
Fecha corriente: | 08/03/2022
Fecha de la última actualización: | 02/12/2022
Autoria: | QUEZADA, M.; AGUILAR, I.; BALMELLI, G.
Afiliación: | MARIANELLA FERNANDA QUEZADA MACCHIAVELLO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; Departamento de Biología Vegetal, Facultad de Agronomía-Universidad de la República, Montevideo, Uruguay; IGNACIO AGUILAR GARCIA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; GUSTAVO DANIEL BALMELLI HERNANDEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.
Título: | Genomic breeding values' prediction including populational selfing rate in an open-pollinated Eucalyptus globulus breeding population.
Año de publicación: | 2022
Fuente/Imprenta: | Tree Genetics and Genomes, 2022, Volume 18, Issue 2, Article number 10. OPEN ACCESS. doi: https://doi.org/10.1007/s11295-021-01534-7
ISSN: | 1614-2942
DOI: | 10.1007/s11295-021-01534-7
Idioma: | Inglés

Notas:

Article history: Received 14 May 2021; Revised 17 November 2021; Accepted 27 November 2021; Published 07 February 2022. -- Electronic supplementary material. --
Corresponding author:   Balmelli, G.; Instituto Nacional de Investigación Agropecuaria (INIA). Programa Nacional de Investigación en Producción Forestal, Estación Experimental del Norte, Ruta 5 km 386, Tacuarembó, Uruguay; email:gbalmelli@inia.org.uy -- Funding: This work was supported by the Instituto Nacional de Investigación agropecuaria (INIA). MQ received a postdoctoral fellowship from INIA.

Contenido: | ABSTRACT.- In forest tree breeding programs, open-pollinated families are frequently used to estimate genetic parameters and evaluate genetic merit of individuals. However, the presence of selfing events not documented in the pedigree affects the estimation of these parameters. In this study, 194 open-pollinated families of Eucalyptus globulus Labill. trees were used to compare the precision of estimated genetic parameters and accuracies of predicted breeding values with the conventional pedigree-based model (ABLUP) and the pedigree-genomic single-step model (ssGBLUP). The available genetic information for pairwise parent-offspring allows us to estimate an actual populational selfing rate of 5.4%. For all the growth and disease resistance traits evaluated, the inclusion of selfing rate was effective in reducing the upward bias, between 7 and 30%, in heritability estimates. The predictive abilities for ssGBLUP models were always higher than those for ABLUP models. In both cases, a considerable reduction of predictive abilities was observed when relatedness between training and validation populations was removed. We proposed a straightforward approach for the estimation of the actual selfing rate in a breeding population. The incorporation of this parameter allows for more reliable estimation of genetic parameters. Furthermore, our results proved that ssGBLUP was effective for the accurate estimation of genetic parameters and to improve the prediction of breeding values in presence of selfing events, thus a valuable tool for genomic evaluations in Eucalyptus breeding programs. © 2022, The Author(s).
Palabras-Clave: | Breeding Value; Disease resistance; Genotype; Selfing rate; Single-step genomic evaluation.
Thesagro: | EUCALYPTUS.
Categoría del tema: | H20 Enfermedades de las plantas

URL:

http://www.ainfo.inia.uy/digital/bitstream/item/16903/1/s11295-021-01534-7.pdf
http://www.ainfo.inia.uy/digital/bitstream/item/16904/1/11295-2021-1534-MOESM1-ESM.pdf

Registro original: | INIA Las Brujas (LB)
Ejemplares: | LB - (103010-1) - PXI - AP - DD - PP/TREE GENETICS&GENOMICS/2022 -  -  - DIS