Reciprocal Effects for Fruit Traits in Tomato: Evidence from QTL Mapping in an Interspecific Cross

Registro completo

Título

Reciprocal Effects for Fruit Traits in Tomato: Evidence from QTL Mapping in an Interspecific Cross

Autor(es)

Cambiaso, Vladimir

Afiliación(es) del/de los autor(es)

Cambiaso, Vladimir. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Investigaciones en Ciencias Agrarias de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Agrarias. Instituto de Investigaciones en Ciencias Agrarias de Rosario; Argentina

Resumen

Reciprocal effects (RE) arise when cross direction influences trait expression and may result from maternal, cytoplasmic, or parent-of-origin effects. Here, we evaluated the impact and persistence of RE at both phenotypic and molecular levels in populations derived from an interspecific tomato cross using a classical QTL mapping framework. Reciprocal effects were detected from the F1 to the F2 generations for key fruit quality traits, including fruit diameter (D), height (H), weight (FW), and shelf life (SL). Reciprocal differences were observed in gene action estimates and deviations from the additive–dominant model, but these effects did not persist across generations. Genetic correlations among fruit traits differed between reciprocal F2 populations, revealing cross direction dependent trait relationships among traits. At the molecular level, reciprocal linkage maps showed significant differences in chromosome lengths and recombination patterns, despite conserved marker order. Integration of phenotypic and molecular data revealed pronounced differences in both the number and genomic positions of QTLs detected in the reciprocal F2 populations. Six QTLs associated with D, FW, fruit shape (FS), and color (L) were consistently detected across populations and genetic backgrounds. Validation in F3 families confirmed the persistence of reciprocal effects for H and locule number (LN), as well as pleiotropic effects involving FW, D, and H. Together, these results demonstrated that reciprocal effects shape the genetic architecture of tomato fruit quality traits and highlight the importance of incorporating cross direction into QTL analyses and breeding strategies.

Año de publicación

2026

Idioma

inglés

Formato (Tipo MIME)

application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

Clasificación temática de acuerdo a la FORD

Agricultura, silvicultura y pesca

Condiciones de uso

Acceso restringido por un tiempo determinado. Estará disponible en: bajo licencia Creative Commons https://creativecommons.org/licenses/by-nc-sa/2.5/ar/

Repositorio digital

CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas

Identificador de proyecto

Ministerio de Ciencia. Tecnología e Innovación Productiva. Agencia Nacional de Promoción Científica y Tecnológica/PICT2021-I-A-00068

Identificador de proyecto

Universidad Nacional de Rosario/PICT2021-I-A-00068