Publicaciones

@article{nokey,

title = {Landscape genetics of the tropical willow Salix humboldtiana: influence of climate, salinity, and orography in an altitudinal gradient},

author = {Mariana S. Hernández-Leal and Marco Suárez-Atilano and Sergio Nicasio-Arzeta and Daniel Piñero and Antonio González-Rodríguez},

doi = {10.1002/ajb2.1824},

issn = {15372197},

year  = {2022},

date = {2022-01-01},

journal = {American Journal of Botany},

volume = {109},

issue = {3},

pages = {456-469},

publisher = {John Wiley and Sons Inc},

abstract = {Premise: Gene flow in riparian ecosystems is influenced by landscape features such as orography, climate, and salinity. The downstream increase in genetic diversity (DIGD) hypothesis states that the unidirectionality of the watercourse causes an accumulation of genetic diversity toward downstream populations, while upstream populations are more structured and less diverse, especially in water-dispersed organisms. Methods: We used chloroplast and nuclear microsatellites to characterize genetic diversity, structure, and gene flow patterns among populations of Salix humboldtiana across an elevation and salinity gradient on three rivers (Actopan, Antigua, and Blanco) in Mexico. We used optimization of resistance surface methods to determine whether genetic distances between populations are correlated with landscape features. Results: Positive FIS values evidenced biparental inbreeding in some populations, particularly at higher elevations where lower niche availability constrains colonization and persistence. Four genetic groups were distinguished, corresponding to populations on the Actopan and Antigua rivers and upstream and downstream on the Blanco, but with high admixture between populations on the Actopan and Antigua rivers. Higher gene flow rates were found among proximate populations on the same river than among different rivers. Genetic diversity increased toward the river mouths, in support of the DIGD hypothesis, probably due to greater niche availability and larger population size. Differences among rivers in precipitation patterns and salinity, as well as geographic distance, were significant predictors of gene flow. Conclusions: Our results depict that the DIGD and gene flow patterns in S. humboldtiana result from the complex interaction among physiography, climate, river salinity, and life-history traits of the species.},

keywords = {DIGD hypothesis, gene flow, genetic structure, Mexico, resistance analysis, riparian tree, Salicaceae},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Regional patterns of genetic structure and environmental differentiation in willow populations (Salix humboldtiana Willd.) from Central Mexico},

author = {Mariana S. Hernández-Leal and Marco Suárez-Atilano and Daniel Piñero and Antonio González-Rodríguez},

doi = {10.1002/ece3.5475},

issn = {20457758},

year  = {2019},

date = {2019-01-01},

journal = {Ecology and Evolution},

volume = {9},

issue = {17},

pages = {9564-9579},

publisher = {John Wiley and Sons Ltd},

abstract = {Aim: To infer the geological and climatic factors that have shaped the genetic diversity and structure of a willow species (Salix humboldtiana) in three basins of Central Mexico. Location: Central Mexico. Methods: We collected samples from 11 populations across two hydrological basins (Balsas and Lerma) and one population from another basin (Ameca) within the Mexican Central Plateau (MCP). Individuals were analyzed using sequences of two chloroplast DNA (cpDNA) regions and eight nuclear simple sequence repeats (nSSR). Population genetic diversity and structure were determined from these data. To evaluate whether genetic structure was associated with ecological niche differentiation, we determined whether there is niche equivalence, overlap, or divergence between the Balsas and Lerma basins. Also, we evaluated the relative contributions of geographic distribution and climatic variation on population genetic structuring through redundancy analysis (RDA) and partial RDA. Results: Both cpDNA and nSSRs data indicated the presence of three highly differentiated genetic groups, mostly geographically congruent with the three main hydrological basins. According to nSSRs, the three genetic groups can be further subdivided into eight subgroups corresponding to different rivers within the main basins. The niche equivalency test showed that the niches of the species in the Balsas and Lerma basins are significantly nonequivalent. The RDA indicated a significant association of genetic variation among populations with climate variables (particularly those related to the precipitation regime), while controlling for geographic distribution. Main conclusions: The genetic structure of S. humboldtiana is strongly associated with the historical and current geological configuration of the basins and the rivers within basins. The observed hierarchical genetic differentiation can be due to gene flow limitation resulting from physical barriers to the dispersal of S. humboldtiana, but also to some degree of isolation by environment, as suggested by the significant association between genetic variation among populations and precipitation regime.},

keywords = {ecological niche modeling, Genetic diversity, genetic structure, niche divergence, riparian ecosystem},

pubstate = {published},

tppubtype = {article}

}

@article{Martinez-Diaz2017,

title = {Fatty Acid Diversity is Not Associated with Neutral Genetic Diversity in Native Populations of the Biodiesel Plant Jatropha curcas L.},

author = {Yesenia Martínez-Díaz and Antonio González-Rodríguez and Héctor Rómulo Rico-Ponce and Víctor Rocha-Ramírez and Isidro Ovando-Medina and Francisco J. Espinosa-García},

doi = {10.1002/cbdv.201600188},

issn = {16121880},

year  = {2017},

date = {2017-01-01},

journal = {Chemistry and Biodiversity},

volume = {14},

issue = {1},

abstract = {Jatropha curcas L. (Euphorbiaceae) is a shrub native to Mexico and Central America, which produces seeds with a high oil content that can be converted to biodiesel. The genetic diversity of this plant has been widely studied, but it is not known whether the diversity of the seed oil chemical composition correlates with neutral genetic diversity. The total seed oil content, the diversity of profiles of fatty acids and phorbol esters were quantified, also, the genetic diversity obtained from simple sequence repeats was analyzed in native populations of J. curcas in Mexico. Using the fatty acids profiles, a discriminant analysis recognized three groups of individuals according to geographical origin. Bayesian assignment analysis revealed two genetic groups, while the genetic structure of the populations could not be explained by isolation-by-distance. Genetic and fatty acid profile data were not correlated based on Mantel test. Also, phorbol ester content and genetic diversity were not associated. Multiple linear regression analysis showed that total oil content was associated with altitude and seasonality of temperature. The content of unsaturated fatty acids was associated with altitude. Therefore, the cultivation planning of J. curcas should take into account chemical variation related to environmental factors.},

keywords = {Biodiesel quality, genetic structure, Jatropha curcas L., Jatropha plantation planning, Phorbol ester, Total oil content},

pubstate = {published},

tppubtype = {article}

}

@article{Balvino-Olvera2017,

title = {Latitudinal structured populations of the Mexican wild squash Cucurbita argyrosperma subsp. sororia revealed by microsatellite markers},

author = {Francisco J. Balvino-Olvera and Karman F. Sánchez-Gómez and Jorge Arturo Lobo and Germán Avila-Sakar and Rogelio Cruz-Reyes and Gumersindo Sánchez-Montoya and Yvonne Herrerías-Diego and Antonio González-Rodríguez and Mauricio Quesada},

doi = {10.1071/CP17341},

issn = {18365795},

year  = {2017},

date = {2017-01-01},

journal = {Crop and Pasture Science},

volume = {68},

issue = {9},

pages = {850-858},

abstract = {Crop wild relatives represent an important agronomic resource for crop improvement and biodiversity conservation. The wild squash Cucurbita argyrosperma subsp. sororia. (Cucurbitaceae) has been considered the wild ancestor of cultivated forms of C. argyrosperma. In order to characterise the geographic patterns of genetic variation in this wild cucurbit and to identify priority areas for conservation, we analysed the genetic diversity and structure of natural populations along the Mexican Pacific coast. By using 14 polymorphic microsatellites, we genotyped 378 individuals sampled from 61 locations. Standard population genetics analyses and group testing were conducted on the genotypes with the aid of principal coordinate analysis and Bayesian analysis. Overall, we found an average of 12.3 alleles per locus and an expected heterozygosity of 0.756. We found greater genetic diversity in southern populations. The fixation index was 0.113, suggesting a mixed mating system. The Mantel test revealed a minor distance effect on genetic differentiation between individuals (r≤0.321). Finally, we found three main groups of populations arranged in a mostly latitudinal pattern, from Sinaloa (north-west) to Oaxaca-Guerrero (south-east). The greater genetic diversity and heterogeneity among southern populations (Guerrero-Oaxaca), suggests that this region is an important centre of diversity of this wild squash with important implications for conservation.},

keywords = {gene flow, genetic structure, plant mating systems, plant reproduction, SSR's, wild and cultivated species, wild gourds},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Fatty Acid Diversity is Not Associated with Neutral Genetic Diversity in Native Populations of the Biodiesel Plant Jatropha curcas L.},

author = {Yesenia Martínez-Díaz and Antonio González-Rodríguez and Héctor Rómulo Rico-Ponce and Víctor Rocha-Ramírez and Isidro Ovando-Medina and Francisco J. Espinosa-García},

doi = {10.1002/cbdv.201600188},

issn = {16121880},

year  = {2017},

date = {2017-01-01},

journal = {Chemistry and Biodiversity},

volume = {14},

issue = {1},

publisher = {Wiley-VCH Verlag},

abstract = {Jatropha curcas L. (Euphorbiaceae) is a shrub native to Mexico and Central America, which produces seeds with a high oil content that can be converted to biodiesel. The genetic diversity of this plant has been widely studied, but it is not known whether the diversity of the seed oil chemical composition correlates with neutral genetic diversity. The total seed oil content, the diversity of profiles of fatty acids and phorbol esters were quantified, also, the genetic diversity obtained from simple sequence repeats was analyzed in native populations of J. curcas in Mexico. Using the fatty acids profiles, a discriminant analysis recognized three groups of individuals according to geographical origin. Bayesian assignment analysis revealed two genetic groups, while the genetic structure of the populations could not be explained by isolation-by-distance. Genetic and fatty acid profile data were not correlated based on Mantel test. Also, phorbol ester content and genetic diversity were not associated. Multiple linear regression analysis showed that total oil content was associated with altitude and seasonality of temperature. The content of unsaturated fatty acids was associated with altitude. Therefore, the cultivation planning of J. curcas should take into account chemical variation related to environmental factors.},

keywords = {Biodiesel quality, genetic structure, Jatropha curcas L., Jatropha plantation planning, Phorbol ester, Total oil content},

pubstate = {published},

tppubtype = {article}

}

@article{Figueredo2015,

title = {Genetic structure of coexisting wild and managed agave populations: implications for the evolution of plants under domestication},

author = {Carmen Julia Figueredo and Alejandro Casas and Antonio González-Rodríguez and Jafet M. Nassar and Patricia Colunga-GarcíaMarín and Víctor Rocha-Ramírez},

doi = {10.1093/aobpla/plv114},

issn = {2041-2851},

year  = {2015},

date = {2015-01-01},

journal = {AoB Plants},

pages = {plv114},

abstract = {Domestication is a continuous evolutionary process guided by humans. This process leads to divergence in characteristics such as behavior, morphology, or genetics, between wild and managed populations. Agaves have been important resources for Mesoamerican peoples since prehistory. Some species are domesticated and others vary in degree of domestication. Agave inaequidens is used in central Mexico to produce mescal, and a management gradient from gathered wild and silvicultural populations, as well as cultivated plantations, has been documented. Significant morphological differences were reported among wild and managed populations, and a high phenotypic variation in cultivated populations composed by plants from different populations. We evaluated levels of genetic diversity and structure associated with management, hypothesizing that high morphological variation would be accompanied by high genetic diversity in populations with high gene flow and low genetic structure among managed and unmanaged populations. Wild, silvicultural, and cultivated populations were studied, collecting tissue of 19 to 30 plants per population. Through 10 nuclear microsatellite loci we compared population genetics parameters. We analysed partition of variation associated with management categories to estimate gene flow among populations. A. inaequidens exhibits high levels of genetic diversity (He=0.707) and moderate genetic structure (FST=0.112). No differences were found in levels of genetic diversity among wild (He=0.704), silviculturally managed (He=0.733), and cultivated (He=0.698) populations. Bayesian analysis indicated that five genetic clusters best fit the data, with genetic groups corresponding to habitats where populations grow rather than to management. Migration rates ranged from zero between two populations to markedly high among others (M=0.73-35.25). Natural mechanisms of gene flow and the dynamic management of agave propagules among populations favor gene flow and the maintenance of high levels of variation within all populations. The slight differentiation associated with management indicates that domestication is in an incipient stage.},

keywords = {agave inaequidens, agaves, conservation genetics, domestication, genetic structure, genetic variation},

pubstate = {published},

tppubtype = {article}

}