Netzahualcoyotl Mayek-Pérez

By Sanjuana Hernández-Delgado, José S. Muruaga-Martínez, Ma. Luisa Patricia Vargas-Vázquez, Jairo Martínez-Mondragón, José L. Chávez-Servia, Homar R. Gill-Langarica and Netzahualcoyotl Mayek-Pérez

Part of the book: Molecular Approaches to Genetic Diversity

By José Luis Chávez-Servia, Elena Heredia-García, Netzahualcoyotl Mayek-Pérez, Elia N. Aquino-Bolaños, Sanjuana Hernández- Delgado, José C. Carrillo-Rodríguez, Homar R. Gill-Langarica and Araceli M. Vera-Guzmán

Grain legumes are considered major sources of dietary proteins, calories, certain minerals and vitamins, and they are the most widely cultivated and consumed crops worldwide. Among them are the common beans, whose major production volumes came from landraces cultivated in traditional farming systems. The objective of this study was to evaluate the phenotypic diversity of a set of common bean landraces from Mexico based on the agromorphological traits and nutritional composition of the grain in the context of traditional farming systems. Different field and laboratory data were collected and complemented with secondary information published in refereed journals and research reports. The results showed that there are significant differences in the morphological and physiological traits of the plant, pod and grain among groups of common bean landraces of different geographic origins, which were associated with different indigenous groups. Similar patterns were observed in the contents of anthocyanins, polyphenols, flavoinds and minerals as well as antioxidant activity. In the evaluated population groups in each region, there are outstanding populations in terms of agromorphological traits and the nutritional value of the grain that can enable a participatory breeding initiative guided by regional objectives. Some populations from Sierra Norte, Oaxaca, presented higher values in Zn and Fe, and populations from Estado de Mexico exhibited high polyphenol and flavonoid values but stable agronomic behaviour.

Part of the book: Grain Legumes

By José Saul Padilla-Ramírez, Roberto Ochoa-Márquez, Rigoberto Rosales-Serna, Francisco J. Ibarra-Pérez, Reinaldo Méndez-Aguilar, Sanjuana Hernández-Delgado, José Luis Chávez-Servia and Netzahualcoyotl Mayek-Pérez

In Mexico, high incidences of Fusarium affect common bean (Phaseolus vulgaris L.) production, reducing grain yields due to seedling death and crop standing reductions. Production of resistant germplasm could be an appropriate strategy for grain yield increasing. Bean breeding programs need the former analysis of plant-pathogen pathosystem to perform the selection of segregating populations with improved resistance to root rot pathogens and the best agroecosystem adaptation. Here, we report our results on characterization of genetic variability patterns of Fusarium solani f. sp. phaseoli (FSP) from Aguascalientes, México; the analysis of P. vulgaris germplasm reactions to highly and naturally FSP-infested field and controlled conditions; and the identification of genetic basis of resistance to FSP root rot in segregating common bean populations. Significant genetic variability in FSP isolates from Aguascalientes and other regions of México was found. Also, we found high variation on reactions to FSP root rots, resistance was more frequent on black seed-coated beans, and susceptibility was common in pinto beans. Resistance to FSP in BAT 477 seedlings was associated with one quantitative trait loci (QTL).

Part of the book: Fusarium