scholarly journals Morphological variation and the process of domestication of Stenocereus stellatus (Cactaceae) in Central Mexico

1999 ◽  
Vol 86 (4) ◽  
pp. 522-533 ◽  
Author(s):  
Alejandro Casas ◽  
Javier Caballero ◽  
Alfonso Valiente-Banuet ◽  
Jose Antonio Soriano ◽  
Patricia Da´vila
Keyword(s):  
Morphological Variation ◽  
Central Mexico ◽  
Stenocereus Stellatus

scholarly journals Morphological variation of Cosmos bipinnatus (Asteraceae) and its relation to abiotic variables in central Mexico

2015 ◽  
Vol 88 (1) ◽  
Author(s):  
Maribel Paniagua-Ibáñez ◽  
Alfredo López-Caamal ◽  
Patricia Mussali-Galante ◽  
Enrique Sánchez-Salinas ◽  
Ma. Laura Ortiz-Hernández ◽  
...  
Keyword(s):  
Morphological Variation ◽  
Central Mexico ◽  
Cosmos Bipinnatus ◽  
Abiotic Variables

scholarly journals Reproductive biology and the process of domestication of the columnar cactus Stenocereus Stellatus in Central Mexico

1999 ◽  
Vol 86 (4) ◽  
pp. 534-542 ◽  
Author(s):  
Alejandro Casas ◽  
Alfonso Valiente-Banuet ◽  
Alberto Rojas-Marti´nez ◽  
Patricia Da´vila
Keyword(s):  
Reproductive Biology ◽  
Central Mexico ◽  
Columnar Cactus ◽  
Stenocereus Stellatus

Maintenance of Phenotypic and Genotypic Diversity in Managed Populations of Stenocereus Stellatus (Cactaceae) by Indigenous Peoples in Central Mexico

2005 ◽  
Vol 15 (3) ◽  
pp. 879-898 ◽  
Author(s):  
Alejandro Casas ◽  
Jennifer Cruse-Sanders ◽  
Eduardo Morales ◽  
Adriana Otero-Arnaiz ◽  
Alfonso Valiente-Banuet
Keyword(s):  
Indigenous Peoples ◽  
Genotypic Diversity ◽  
Central Mexico ◽  
Stenocereus Stellatus

scholarly journals Evolution under domestication of correlated characters in populations of Stenocereus stellatus (Pfeiff.) Riccob., under different forms of management in central Mexico: genetic diversity, damage, and defense mechanisms

2021 ◽  
Author(s):  
Verónica Patiño-López ◽  
David Bravo-Avilez ◽  
Carlos F. Vargas-Mendoza ◽  
José Blancas ◽  
Beatriz Rendón-Aguilar
Keyword(s):  
Genetic Diversity ◽  
Defense Mechanisms ◽  
Central Mexico ◽  
Damage Level ◽  
Stenocereus Stellatus ◽  
Domestication Process ◽  
Cultivated Populations ◽  
Correlated Characters ◽  
Human Selection

AbstractAcross the process of domestication, human selection produces changes in target attributes as well as changes that are not necessarily desired by humans due to pleiotropic or linked genes. In this paper we addressed, correlated changes between genetic diversity, damage level, defense mechanisms (resistance and tolerance), and fitness due to the domestication process of Stenocereus pruinosus (Otto ex Pfeiff.) Buxbaum and Stenocereus stellatus (Pfeiff.) Riccobono, an endemic columnar cactus of south-central Mexico. One hundred eighty individuals of S. stellatus from wild, in situ managed, and cultivated populations of Valle de Tehuacán and Mixteca Baja, Puebla, were sampled, and attributes including damage level, defense mechanisms and fitness (number of fruits) were measured. The DNA of 176 individuals was extracted to amplify and analyze five microsatellites in order to estimate genetic diversity and structure. As expected, cultivated populations showed a significantly higher damage level, as well as lower resistance and genetic diversity. Depending on the form of management, correlations between genetic diversity and the rest of the attributes exhibited different patterns. In wild populations, genetic diversity was positively correlated with damage and negatively with resistance; in situ managed populations exhibited the opposite pattern, and in cultivated populations, no correlations were found between these attributes. We propose a hypothetic model of human selection to explain the variation in these correlations. No differences in genetic diversity and tolerance were detected between regions; however, the populations of Valle de Tehuacán exhibited more damage and more resistance. In both regions, populations showed a positive correlation between fitness and resistance and a negative correlation between damage and resistance, suggesting the existence of a defense mechanism to ensure fitness. Also, non-regional differentiation suggests an eventual gene flow due to pollinators, human movement of branches, or a common ancestry before the domestication process.

scholarly journals Variación morfológica de poblaciones silvestres y arvenses de Solanum ehrenbergii (Solanaceae)

2017 ◽  
pp. 85
Author(s):  
Mario Luna Cavazos
Keyword(s):  
Principal Components ◽  
Morphological Variation ◽  
Morphological Characterization ◽  
Numerical Analyses ◽  
Central Mexico ◽  
Natural Conditions ◽  
The People

Solanum ehrenbergii ("papa de monte" or "papa güera") is a species with edible tubers, valuable for the people from central Mexico. The farmers seek the tubers in "nopaleras" and "mezquitales'', but more commonly, they can be found in corn and bean cultivated fields, thus the plants are tolerated and encouraged. The environment in which S. ehrenbergii grows is variable, from harsh, in natural conditions , to bening, in the cultivated fields. The hypothesis is that it must exist a pattern of morphological variation in response to the origin of the populations. The objectives of the study were: a] to analyze the pattern of morphological variation between wild and weed populations of Solanum ehrenbergii and b] to document possible taxonomic differences and evolutive trends under management conditions. The methods included the morphological characterization of botanic material and the numerical analyses of data by cluster and principal components. The results indicated, that populations are grouped according to its origin wild or weed. Probably, the morphological variation of S. ehrenbergii is influenced for an incipient process of domestication in response to practices of tolerance, protection and encouragement carried out by the farmers.

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