Méndez-Aguilar R¹, MH Reyes-Valdés², N Mayek-Pérez³

Phyton-International Journal of Experimental Botany, Vol.82, pp. 215-226, 2013, DOI:10.32604/phyton.2013.82.215

Abstract Common bean was originated in México, and it is the most important protein source for millions of Mexicans, mainly those with low economic incomes. Grain yield of this crop is mainly affected by several fungal, bacterial and viral diseases. Among them, there are root rot diseases caused by the genera Macrophomina and Fusarium sp. Currently, some molecular biology tools such as DNA molecular markers are being used successfully to develop genetic maps where QTLs and major molecular markers are located, which are linked to genes that confer resistance to these fungi. The importance of the development… More >

López Colomba E¹, A Prina², S Griffa¹, AN Ribotta¹, E Carloni¹, E Tommasino¹, C Luna¹, E Biderbost¹, K Grunberg¹

Phyton-International Journal of Experimental Botany, Vol.80, pp. 59-64, 2011, DOI:10.32604/phyton.2011.80.059

Abstract Cenchrus ciliaris L., a forage grass of wide distribution in the north-west of Argentina, is a tetraploid (4x = 36) and obligate apomictic species. One way of obtaining novel germplasm is by induced mutations. In this work, physical and chemical mutations are combined with in vitro selection procedures seeking for new germplasm, with emphasis on salinity and drought tolerance. Mature seeds of Cenchrus ciliaris L. cv Biloela were subjected to treatments with X rays (400 Gy) and ethyl methanesulphonate (EMS) water solution (5.5 mM for 24 h). To perform in vitro selection, after 7 days of EMS or X More >

Morant AE, HD Merchán, EE Lutz

Phyton-International Journal of Experimental Botany, Vol.80, pp. 5-8, 2011, DOI:10.32604/phyton.2011.80.005

Abstract This study aimed to characterize wheat cultivars for their chilling requirements for differentiation and their relationship to flowering time, to establish a dual purpose ideotype. Seeds of eight genotypes (cultivars and advanced lines) of bread wheat were exposed to constant temperature (4 °C) in germination chambers for 8, 6, 4 and 2 weeks. A control treatment was kept at room temperature. Four replicates of each treatment were placed in the greenhouse in 250 cc pots containing 4 seedlings each, with irrigation and natural photoperiod, following a randomized complete block design. The greenhouse temperature was constant… More >

DULCE MA. BARRADAS-DERMITZ^1,*, PATRICIA M. HAYWARD-JONES², MARTÍN MATA-ROSAS³, BEATRIZ PALMEROSSÁNCHEZ², OSCAR B. J. PLATAS-BARRADAS⁴, RODOLFO F. VELÁSQUEZ-TOLEDO²

BIOCELL, Vol.34, No.1, pp. 1-6, 2010, DOI:10.32604/biocell.2010.34.001

Abstract Of the initial six cell lines originating from explants of Taxus globosa, or Mexican yew (stem internode, leaves and meristematic tissue), three were selected for their microbial and oxidation resistance, two from leaves and the other from stem internode. A study of their behavior, both in terms of cell growth, and of baccatin III and paclitaxel production, was developed in suspension cultures with an initially standardized biomass (fresh weight 0.23 g/L) using modified Gamborg’s B5 medium, and an elicitor (methyl jasmonate), on either the first or seventh day of culture, at several levels (0, 0.1, 1, More >

Alejandre Rosas¹ JA, ME Galindo Tovar², HE Lee Espinosa², OG Alvarado Gómez³

Phyton-International Journal of Experimental Botany, Vol.79, pp. 87-94, 2010, DOI:10.32604/phyton.2010.79.087

Abstract Development of new sugarcane varieties allows to increase sucrose production and faces challenges as new pests and diseases, and soil fertility losses. The objective of this study was to contribute to expand molecular tools in selecting useful progenitors for hybridization programs. With this purpose, 14 RAPDs primers were pre-screened, and four of them which produced clearly resolved, reproducible and polymorphic fragment patterns were selected for genetic analysis of 22 sugarcane variety hybrids. These were used in the Estación de Hibridación at Tapachula, Chiapas, as progenitors in genetic improvement programs. Genetic distance analysis showed three main More >

Azuara Hernández¹ L, H Silos Espino¹, C Perales Segovia¹, JF Gómez Leyva², AG Alpuche Solís³, LM Macias Valdez⁴

Phyton-International Journal of Experimental Botany, Vol.77, pp. 81-91, 2008, DOI:10.32604/phyton.2008.77.081

Abstract The objective of this study was to compare the yield and genetic relationships between two Perla garlic selections, obtained by individual selection of cloves, and commercial varieties and cultivars adapted to diverse regions of Mexico (which did not have a selection process). Varieties with fewer cloves showed higher yields. Coreano and California produced 20 ton/ha (fresh weight) and Perla selections between 17-19 ton/ha (fresh weight). Six primers of the series OPB were tested for genetic characterization and OPB-17 was selected. With the amplified DNA fragments, a bina-ry matrix was generated; afterwards, a dissimilarity matrix and More >

Osorio Rivera Fray León¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.7, No.2, pp. 63-76, 2008, DOI:10.3970/icces.2008.007.063

Abstract In the development context of a project about a system of selection uchuva for export by means of artificial vision whose objective is to provide an electromechanical system to able to select uchuvas by searching on its physical appearance, some algorithms have been developed to extract the necessary details beginning with the image of the acquired fruit using a camera. As a result, it must be able to determine if the visualized uchuva presents some symptom (insects, fungus, and deterioration) that indicates if it should be discharged. More >

Luján-Rangel¹ R, E Olivares-Sáenz², RE Vázquez-Alvarado², L Garza-Ocañas³, O Torres-Alanís³

Phyton-International Journal of Experimental Botany, Vol.76, pp. 61-77, 2007, DOI:10.32604/phyton.2007.76.061

Abstract Karwinskia parvifolia (Kp) and Karwinskia humboldtiana (Kh) are poisonous plants of the rhamnacea family. Toxicological and clinical studies performed with one of the compounds present in the fruit [peroxisomicine A1 (PA1)] suggest its possible pharmacological usefulness in the treatment of certain types of cancer. This is why these plants are cultivated: to increase their productivity of PA1. We studied the effects of nitrogen and species on seed viability. The germination curve was determined for Kp with (Kp-WN) and without (Kp-NN) nitrogen, and for Kh without nitrogen (Kh-NN) using the probit model. This is characterized by the probability of… More >