title: Genotypic variation in response to salinity in a new sexual germplasm of Cenchrus ciliaris L.
abstract: As part of a breeding program for new salt-tolerant sexual genotypes of Cenchrus ciliaris L., here we evaluated the salt-stress response of two new sexual hybrids, obtained by controlled crosses, at seedling and germination stages. A seedling hydroponic experiment with 300 mM NaCl was performed and physiological variables and growth components were evaluated. While salt-treated sexual material did not show a decrease in productivity with respect to control plants, a differential response in some physiological characteristics was observed. Sexual hybrid 1-9-1 did not suffer oxidative damage and its proline content did not differ from that of control treatment. By contrast, sexual hybrid 1-7-11 suffered oxidative damage and accumulated proline, maintaining its growth under saline stress. At the germination stage, sexual hybrid 1-9-1 presented the highest Germination Rate Index at the maximum NaCl concentration assayed, suggesting an ecological advantage in this genotype. These new sexual resources are promising maternal parental with differential response to salt and could be incorporated in a breeding program of C. ciliaris in the search of new genotypes tolerant to salinity.
authors.affiliation: Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria (IFRGV-CIAP-INTA), Camino 60 cuadras Km 5 ½, X5020ICA, Córdoba, Argentina. Electronic address: quiroga_mariana@yahoo.com.ar.
authors.forename: Mariana
authors.initials: M
authors.lastname: Quiroga
authors.affiliation: Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria (IFRGV-CIAP-INTA), Camino 60 cuadras Km 5 ½, X5020ICA, Córdoba, Argentina.
authors.forename: Exequiel
authors.initials: E
authors.lastname: Tommasino
authors.affiliation: Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria (IFRGV-CIAP-INTA), Camino 60 cuadras Km 5 ½, X5020ICA, Córdoba, Argentina.
authors.forename: Sabrina
authors.initials: S
authors.lastname: Griffa
authors.affiliation: Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria (IFRGV-CIAP-INTA), Camino 60 cuadras Km 5 ½, X5020ICA, Córdoba, Argentina.
authors.forename: Andrea
authors.initials: A
authors.lastname: Ribotta
authors.affiliation: Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria (IFRGV-CIAP-INTA), Camino 60 cuadras Km 5 ½, X5020ICA, Córdoba, Argentina.
authors.forename: Eliana López
authors.initials: EL
authors.lastname: Colomba
authors.affiliation: Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria (IFRGV-CIAP-INTA), Camino 60 cuadras Km 5 ½, X5020ICA, Córdoba, Argentina.
authors.forename: Edgardo
authors.initials: E
authors.lastname: Carloni
authors.affiliation: Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria (IFRGV-CIAP-INTA), Camino 60 cuadras Km 5 ½, X5020ICA, Córdoba, Argentina; Consejo de Nacional Investigaciones Científicas y Técnicas, Godoy Cruz 2290, C1425FQB, CABA, Argentina.
authors.forename: Karina
authors.initials: K
authors.lastname: Grunberg
mesh_terms: D031741:Cenchrus / Q000235:genetics / Q000254:growth & development; D014644:Genetic Variation; D005838:Genotype; D000069600:Plant Breeding; D054712:Salinity; D036226:Seedlings / Q000235:genetics / Q000254:growth & development; D012965:Sodium Chloride / Q000378:metabolism / Q000494:pharmacology
chemical_list: D012965:Sodium Chloride
keywords: Cenchrus ciliaris; Germination; Salt stress; Seedling; Sexual hybrids