Heterotic groups of onions (Allium cepa L.) for the development of low-pungency hybrids

The growing demand for low-pungency cultivars onion has opened new market niches. The objective of this study was to characterize heterotic onion groups to develop low-pungency hybrid cultivars. A field experiment with a randomized block design and two factors (genotype and fertilization) arranged in split plots was carried out in Ituporanga-SC (Brazil), in 2019. The plots corresponded to two fertilization levels (with and without sulfur), and the subplots corresponded to 26 onion genotypes, where the germplasm was derived from different (male-sterile-LA and maintainer-LB) lines, advanced populations and cultivars. The bulbs were evaluated for the following traits: pyruvic acid (indicator of pungency), sulfur content and bulb yield. The genotype performance differed according to the fertilization level. In the sulfur-free treatments, four heterotic groups were identified. The genetic variation in the crosses LA11 × LB24 and LA15 × LB19 could be exploited for negative selection for pungency and positive selection for bulb yield.

• Tipo de recurso: http://purl.org/coar/resource_type/c_7170
• Fecha de publicación: 2022
• Institución: Universidad Pedagógica y Tecnológica de Colombia
• Repositorio: RiUPTC: Repositorio Institucional UPTC
• Idioma: eng
• OAI Identifier: oai:repositorio.uptc.edu.co:001/16998
• Acceso en línea: https://revistas.uptc.edu.co/index.php/ciencias_horticolas/article/view/13584; https://repositorio.uptc.edu.co/handle/001/16998
• Palabra clave: Bulb yield; Ideotype; Multivariate analysis; Pyruvic acid content; Standardized canonical coefficient; Vegetables; Fert; Rendimiento de bulbos; Ideotipo; Análisis multivariado; Contenido de ácido pirúvico; Coeficiente canónico estandarizado; Vegetales; Fertilizacion
• License: Copyright (c) 2022 Revista Colombiana de Ciencias Hortícolas