Aims: To determine the agronomic response of the bell pepper grown in open field to the application of the Ultrasol chile® fertilizer via fertigation. Study Design: It was with the completely randomized model with five treatments (T0 or control, 0.6, 0.8, 1.0 and 1.2 g L-1 of Ultrasol chile®) and four repetitions each. The comparison of means was by Tukey ≤ .05. Place and Duration of Study: Experimental fields "the Bajío” Buenavista, Plant Breeding Department of the Universidad Autónoma Agraria Antonio Narro. between June 2019 to December 2019. Methodology: In bell pepper five treatments were applied (T0 or control, 0.6, 0.8, 1.0 and 1.2 g L-1 of Ultrasol chile®). The treatments were carried out via fertigation and applied three times a week, the applications started 15 days after the transplant and until the end of the cycle. Results: The yield behaved in a similar way with the applied doses of the fertilizer, however, they exceeded the control by more than 90%. Average fruit weight (AFW), fruit length (FL) and equatorial diameter of fruit (EDF) showed a differential statistical response, in which the application of 1 g L-1 of Ultrasol chile® via fertigation resulted in a better response and it surpassed the control in 120, 44 and 13.5% respectively. The height of the plant was statistically similar between the control and the 1.2 and 0.8 g L-1 treatments. The correlations indicate that the crop yield is a function of the AFW, FL and NFP, in turn the FL and EDF, are what determine the AFW. Conclusion: The most appropriate dose of Ultrasol chile® for bell pepper grown in the open field was 1 g L-1, since it improves the average weight of fruit, equatorial diameter of fruit and length of fruit, therefore, there is feasibility in the use of this commercial formulation.

Cada día es más difícil satisfacer la demanda alimenticia mundial, por ello la importancia de trabajar en el desarrollo de nuevas variedades de alto rendimiento y calidad de fruto, aprovechando los recursos genéticos de México, para el desarrollo y utilización de variedades superiores que permitan reducir los costos de producción de sistemas de agricultura protegida ya que, en México en estos sistemas un porcentaje importante proviene de empresas extranjeras a costos elevados. Sin embargo, los pequeños productores siembran semilla criolla de bajo rendimiento y calidad de fruto. En este trabajo se evaluó el RTF y sus componentes (NFP, PPF), además de algunos caracteres de calidad (CAA, CT y CAPs) y agronómicos (ADP, DBT, DAF, y DAC) de nueve híbridos de chile en sus generaciones F2 y sus respectivos progenitores, los cuales fueron establecidos en invernadero, bajo un diseño experimental bloques completos al azar con tres repeticiones. Los análisis de varianza exhibieron diferencias significativas (p< 0.01) entre progenitores y poblaciones F2 en todas las variables estudiadas. En RTF las poblaciones F2 (P1, 7 y P3, 4) superaron 7 y 5% respectivamente a su F1, siendo esta última, la que presento el RTF más alto en esta generación con 2 764 g planta-1. Todas poblaciones F2 presentaron cantidades intermedias y valores positivos en DEP en CT, CAA Y CAPs. Concluyendo que en la generación F2 hubo poblaciones promisorias para el desarrollo de nuevas variedades, ya que incrementaron rendimiento y calidad de fruto de F1 a F2, con rendimiento estimado superior a 100 t ha-1.

Aims: Evaluate the impact and biofortification of iodide (I-) and iodate (IO3-), on melon morphology and physiology under greenhouse conditions. Study Design: Experimental design was completely randomized with a 2x2x3 factorial arrangement, for a total of 12 treatments and 4 repetitions, giving a total of 48 experimental units. Means were compared using LSD test at 0.05. Place and Duration of Study: Experiment was established in greenhouses of Universidad Autónoma Agraria Antonio Narro, Saltillo. Coahuila. Mexico, between April and July 2020. Methodology: Iodine applications were made 15 days after transplant, with a total of 10 applications to substrate and 5 foliar applications during experiment. Treatments consisted of potassium iodide (KI) applications directly to the substrate and foliar at 0.0, 0.5 and 1 mM of iodide (I-), every week to the substrate and every 15 days in a foliar way. In same way, with potassium iodate (KIO3) treatments, applying 0, 0.5 and 1 mM of iodate (IO3-). Results: Applications of 1 mM iodate to the substrate increased the number of leaves and leaf area. Yields decreased where iodine was applied. Nitrogen uptake improved in almost all applications of iodide and iodate. Potassium decreased with iodide and iodate applications. The concentration of iodine in the stage of flowering and maturity with applications of iodide to the substrate 1 mM. Iodine concentrations in melon fruit were better at low concentrations of foliar applied iodide and 0.5 mM substrate. Conclusion: Applications of iodide and iodate have a positive effect to melon fruits, without presenting phytotoxic effects.

Aims: To estimate the effects of general and specific combinatorial fitness in parents and progeny on yield and fruit quality related traits of melon. Study Design: A completely randomized block design with three replications was used to estimate the analysis of variance and the effects of general combining ability (GCA) and specific combining ability (SCA). The genetic analysis was carried out based on the Griffing Method II dialelic design (1956) with fixed effects model. Tukey P=.05 mean comparison analysis. Place and Duration of Study: The research was conducted in two stages. In stage 1, seed production of the parents and crosses was carried out at the Physiotechnical Greenhouse of the of the Universidad Autónoma Agraria Antonio Narro, Saltillo, Coahuila. Mexico, between April and July 2021. In stage 2, the evaluation of the parents and progeny was carried out between August and November 2021 in the agricultural field "La Jaroza", Paila, Coahuila. México. Methodology: In the present study, seven melon parents were analyzed. The parents were crossed in all possible combinations, without reciprocal crosses, resulting in 21 progenies, a total of 28 genotypes evaluated. Results: The results showed significant differences between genotypes, general and specific combining ability effects (GCA and SCA) for almost all variables, except fruit number. The parent "(E x L)" showed the best yield and GCA effects, and participated in most of the outstanding crosses in yield, average fruit weight, fruit length, fruit width, flesh thickness, seed cavity and soluble solids. The "N x (E x L)" progeny excelled in yield and average fruit weight in SCA. Conclusion: The parent "(E x L)" showed the best yield and GCA effects and participated in most of the outstanding crosses in yield, average fruit weight, fruit length, fruit width, flesh thickness, seed cavity and soluble solids. The progeny "N x (E x L)" excelled in yield in SCA.

El tomate es una de las hortalizas de mayor consumo a nivel mundial tanto en fresco como en procesos industriales. Sin embargo, en México los rendimientos en campo abierto e invernadero son generalmente bajos. Para incrementar el rendimiento es necesario, entre otras acciones, realizar evaluaciones respecto a los efectos genéticos en variedades e híbridos. El objetivo de este estudio fue determinar los efectos genéticos e identif icar genotipos con potencial de rendimiento en ocho variedades de tomate (Solanum lycopersicum L.) y sus 28 híbridos F1. Las cruzas se produjeron en un invernadero de la Universidad Autónoma Agraria Antonio Narro (UAAAN) en Saltillo, Coahuila, México, durante el ciclo (O-I 2011) y se evaluaron en un lote experimental de la misma universidad en el ciclo (P-V 2012), bajo un diseño experimental de bloques completos al azar, con tres repeticiones. Se observó significancia (p≤ 0.01 y p≤ 0.05), en las fuentes de variación de genotipos, variedades, heterosis, heterosis promedio, heterosis varietal y heterosis especifica en la mayoría de las variables en estudio. Las variedades IR9 e IR13 mostraron el mayor efecto de ACG y los híbridos IR14*D6, IR13*D4 y D4*D3 presentaron altos valores de ACE para rendimiento y por consecuencia los mayores rendimientos, superando los 100 t ha-1 en campo abierto. Las variedades y cruzas con mayores efectos aditivos (ACG) y no-aditivos (ACE) con respecto a rendimiento, podrían ser usadas dentro de un programa de mejoramiento genético, donde la acción aditiva puede ser manejada bajo un esquema de selección recurrente y la no-aditiva por hibridación.