Browsing by Author "Gebauer H., Marlene"
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- ItemAnthocyanin profiling of wild maqui berries (Aristotelia chilensis [Mol.] Stuntz) from different geographical regions in Chile(2014) Fredes González, Carolina Paz; Yousef, Gad G.; Robert Canales, Paz Soledad; Grace, Mary H.; Lila, Mary, Ann; Gómez, Miguel; Gebauer H., Marlene; Montenegro Rizzardini, Gloria
- ItemConstruction of a highly saturated linkage map in Japanese plum (Prunus salicina L.) using GBS for SNP marker calling(2018) Carrasco Gálvez, Basilio Alejandro; González, Máximo; Gebauer H., Marlene; García González, Rolando; Maldonado, Jonathan; Silva, Hernan
- ItemGenetic characterization of japanese plum cultivars (prunus salicina) using SSR and ISSR molecular markers(2012) Carrasco Gálvez, Basilio Alejandro; Díaz Gálvez, Carole; Roas Moya, Mario Alejandro; Gebauer H., MarleneThe genetic characterization of 29 elite Japanese plum cultivars (Prunus salicina) and 4 Prunus cultivars was carried out by analyzing 97 Simple Sequence Repeat (SSR) alleles and 232 binary Inter Simple Sequence Repeat (ISSR) loci. A high level of genetic variability was found for these two molecular markers among the Japanese plum cultivars compared to other Prunus species. On average, the variability found by analyzing the SSR alleles were Na = 12.1, Ne = 5.2, Ho = 0.9, He = 0.8 and F= -0.127, whereas ISSR yielded values of h = 0.15 and I = 0.27. The genetic relationship among cultivars was estimated with Principal Coordinate Analysis (PCA) and a Bayesian clustering approach using the software program Structure. This program identified two subgroups (k=2). The first group included cultivars of four Prunus species: P. salicina, P. armeniaca, P. domestica and P. ceracifera, whose memberships ranged between 0.74 and 1.0. The second group included 19 Japanese plum cultivars and one plumcot cultivar, with memberships between 0.57 and 0.99. With some exceptions, similar relationships among cultivars were foundPCA. The level of genetic differentiation between two groups was low (Gst =0.055 and ST =0.04), and a low level of linkage disequilibrium (LD) was observed for all allele combinations. These results suggest that the high level of genetic variability, the low level of LD and the scarce degree of differentiation detected by Structure between the two genetic groups can be explained by the self-incompatibility mechanism that favors the exchange between genetically distant Prunus cultivars and by the intra- and interspecific hybridization strategies frequently used in plum breeding programs.
- ItemLeNRT1.1 improves nitrate uptake in grafted tomato plants under high nitrogen demand(2018) Albornoz G., Francisco; Gebauer H., Marlene; Ponce, Carlos; Cabeza, Ricardo A.
- ItemOptimization of in vitro culture conditions for Pinus radiata embryos and histological characterization of regenerated shoots(1999) Stange, C.; Prehn Roth, Doris Angela; Gebauer H., Marlene; Arce Johnson, Jorge Patricio
- ItemRevisión crítica y actualización de la tesis "Establecimiento de un protocolo de saneamiento vegetal para la eliminación de los virus Alstroemeria mosaic virus (ALMV) y Lily symptomless virus (LSV) en dos genotipos de Alstroemeria”, para su publicación en una revista científica(2021) Medina Medina, Fiorella Julia; Gebauer H., Marlene; Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalLa finalidad de la investigación es la producción de nuevo conocimiento y éste sólo se puede aplicar en la medida que sea difundido. La publicación cientifica referenda la producción intelectual y asegura la calidad de la investigación. En este trabajo se realizó un nuevo análisis crítico a través de la actualización de información bibliográfica, análisis estadístico de los datos y aporte a la discusión de la tesis “Establecimiento de un protocolo de saneamiento vegetal para la eliminación de los virus Alstroemeria mosaic virus (AlMV) y Lily symptomless virus (LSV) en dos genotipos de alstroemeria”. El objetivo fue elaborar un artículo cientifico a partir de resultados disponibles para protocolos de saneamiento vegetal para la eliminación de los virus en alstroemeria, con el fin que sea sometido a revisión de pares en una revista cientifica.
- ItemScreening for indole-3-acetic acid synthesis and 1-aminocyclopropane-carboxylate deaminase activity in soil yeasts from Chile uncovers Solicoccozyma aeria as an effective plant growth promoter(2023) Carvajal Contardo, Mariajosé; Godoy, Liliana; Gebauer H., Marlene; Catrileo Aros, Daniela; Albornoz G., FranciscoBackground and aims: Plant growth-promoting microorganisms (PGPMs) stimulate plant growth by a series of mechanisms, including atmospheric nitrogen fixation, phosphorus solubilization and the synthesis of plant hormones. Within the group of PGPMs, several species of bacteria and fungi have been extensively studied. However, little information is available with regard to soil yeasts. The present study was conducted to identify yeast strains isolated from different soils in Chile that present plant growth promotion activity. Methods: Twenty-three strains were evaluated either for their capacity to synthesize indole-3-acetic acid or show aminocyclopropane-1-carboxylate deaminase activity. The effect on tomato seedling growth was evaluated in vitro, and two strains were selected for in vivo evaluation of plant growth and root ethylene synthesis. Results: All the strains analyzed presented IAA synthesis within the range between 0.8 and 3.3 ?g IAA mL?1. Solicoccozyma aeria (YCPUC75 and YCPUC79 strains) was the only yeast with ACC deaminase activity. In vitro inoculation of tomato seeds with eight of the evaluated strains resulted in an increase in the root volume and the number of lateral roots. In the second experiment, a 40% reduction in root ethylene synthesis was achieved by adding S. aeria (YCPUC79) to the root zone, which resulted in a 26% increase in plant growth. Conclusions: Solicoccozyma aeria YCPUC79 is an effective plant growth promoter stimulating root growth and reducing root ethylene synthesis.
- ItemStable transformation of Pinus radiata embryogenic tissue by Agrobacterium tumefaciens(2002) Cerda, Francisca; Gebauer H., Marlene; Medina, Consuelo; Arce Johnson, Jorge Patricio
- ItemTarget-Site Resistance to Nicosulfuron in Johnsongrass (Sorghum halepense) from Chilean Corn Fields(2015) Hernández, María J.; León, Rocío; Fischer, Albert J.; Gebauer H., Marlene; Galdames, Rafael; Figueroa Espinoza, Rodrigo
- ItemTransformación Genética de Pinus Radiata Mediante Embriogénesis Somática(2000) Cerda, F.; Gebauer H., Marlene; Arce Johnson, Jorge Patricio