Implications of genomic selection for obtaining F2:3 families of tomato

• Published in: Scientia horticulturae Vol. 207; pp. 7 - 13
• Main Authors: Hernández-Bautista, Aurelio, Lobato-Ortiz, Ricardo, García-Zavala, J. Jesús, Parra-Gómez, Mayra Alicia, Cadeza-Espinosa, Marisol, Canela-Doñan, Daniel, Cruz-Izquierdo, Serafín, Chávez-Servia, José Luis
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 05.08.2016
• Subjects: Bayesian model; genetic improvement; genotype; linear models; marker-assisted selection; mixed linear model; phenotype; phenotypic selection; prediction; quantitative traits; Solanum lycopersicum; tomatoes; mixed linear model; marker-assisted selection; phenotypic selection; Bayesian model; Solanum lycopersicum
• ISSN: 0304-4238; 1879-1018
• DOI: 10.1016/j.scienta.2016.05.005

•Different types of marker-based selection were compared over traditional selection.•Bayesian and mixed linear models provided to be more accuracy than that of the linear model with all fixed effects.•Heritability and molecular markers linked to QTLs plays a critical role on genomic prediction in tomato.•High genetic gains were evident on traits related to fruit size.•Phenotypic selection was more efficient than genomic and marker-assisted selection. Selection plays an important role into breeding programs since it increases the population genotypic mean for a trait. In tomato, the generation and evaluation of large populations is an activity carried out by the breeder which produces increases in cost and time. The objective of this research was to compare the accuracy of phenotypic and marker-based selection for six traits related to fruit in a segregating population as well as to study the performance of several models of genomic selection. Results of the evaluation of six quantitative traits indicated that the prediction accuracies using ridge regression and Bayesian LASSO were greater in comparison to that obtained by multiple linear regression for the situations proposed. During the selection of the best genotypes at both F2 and F3 generations, in general, the phenotypic selection had higher genetic gains than those obtained by the strategies based on genomic selection and marker assisted selection.