Interspecific gene flow can occur in many combinations among species within the genus Quercus, but simultaneous hybridization more than two has been rarely analysed. The present study addresses genetic structure and morphological variation a triple hybrid zone formed by Q. hypoleucoides, scytophylla sideroxyla north-western Mexico. A total of 247 trees from ten reference 13 presumed intermediate populations were characterized using leaf shape geometric morphometrics, seven nuclear...

† Background and Aims The Tehuaca ´n Valley in Mexico is a principal area of plant domestication Mesoamerica.There, artificial selection currently practised on nearly 120 native species with coexisting wild, silvicultural cultivated populations, providing an excellent setting for studying ongoing mechanisms evolution under domestication.One these the columnar cactus Stenocereus pruinosus, which we studied how operating through traditional management whether it has determined morphological...

Reduced water availability during drought can create major stress for many plant species. Within a species, populations with history of seasonal may have evolved the ability to tolerate more than those in areas high precipitation and low seasonality. In this study, we assessed response California oak Quercus lobata Née, by measuring changes gene expression profiles before after simulated treatment through deprivation seedlings greenhouse setting. Using whole-transcriptome sequencing from...

Oaxaca state is one of the main hotspots biodiversity in Mexico, containing almost 40% Mexican vascular flora, due to its high variability habitat and climatic conditions coupled with elevations mountains low valleys. We studied genetic diversity population structure Quercus candicans, crassifolia, castanea across their geographical distribution understand how heterogeneous physiography had driven differentiation these three oak species. found levels but ca. populations significant values...

We used mitochondrial DNA (mtDNA) sequence data and allele frequencies at eight microsatellite loci to examine the population genetic structure, estimate divergence times of distinct lineages, infer patterns associated with host colonization in populations bark beetle Dendroctonus approximatus Mexico. Two haplotype groups were identified using mtDNA sequences 71 individuals from 15 populations. The first group was distributed Sierra Madre Occidental (SMOc, Western Mexico), some Faja...

The Mexican highlands are areas of high biological complexity where taxa Nearctic and Neotropical origin different population histories found. To gain a more detailed view the evolution biota in these regions, it is necessary to evaluate effects historical tectonic climate events on species. Here, we analyzed phylogeographic structure, demographic processes, contemporary period, Last Glacial Maximum (LGM) Interglacial (LIG) ecological niche models

The tropical dry forest is a greatly endangered ecosystem, from which Jacaratia mexicana native tree. With the aim to assess levels of genetic variation and population structure, four wild populations J. were studied in Sierra de Huautla Biosphere Reserve, Morelos, Mexico. For this, DNA was extracted 159 individuals amplified with six random primers using Random Amplified Polymorphic (RAPD). A total 54 bands obtained, 50 (92.6%) polymorphic. diversity found within 0.451 when estimated by...

Mammillaria pectinifera is an endemic, short-globose cactus species, included in the IUCN list as a threatened species with only 18 remaining populations Tehuacán-Cuicatlán Valley central Mexico. We evaluated population genetic diversity and structure, connectivity, recent bottlenecks size, using nuclear microsatellites. M. showed high but some evidence of heterozygote deficiency (FIS ), reductions size. Also, we found low differentiation values connectivity for pectinifera, result...

Laelia speciosa is an orchid species listed as threatened of extinction in the Mexican standard NOM-059. Wild populations L. have been declining due to fragmentation its habitat and massive extraction for trading local markets Mexico. In this study, we aimed evaluate evolutionary potential within a fragmented landscape ca. 4000 km 2 Cuitzeo basin, State Michoacán. We sampled 15 throughout basin amplified eight nuclear microsatellite markers assess genetic diversity, structure, connectivity...

Chamaedorea alternans is a palm species that has suffered from selective extraction, and habitat loss. We collected 11 populations fragmented conserved forest. assess genetic variation of C. alternans, exchange, differentiation, bottlenecks, effective population size signals natural selection. Genetic diversity was higher in than forest but not significant. Fragmentation did play significant role diversity, possibly due to the heterogeneity. been subject pronounced isolation trees as product...

Habitat disturbance in tropical forests has affected the viability of several tree species. In Mexico, populations Guaiacum sanctum have disappeared some regions due to a strong habitat reduction which could endanger genetic diversity and connectivity remnant populations. this study, 17 from Yucatán Peninsula were analyzed with seven nuclear microsatellites. Several parameters describing estimated. The structure was evaluated using Bayesian cluster analysis. Population bottlenecks, effective...

The coffee sector’s challenges, such as low and volatile prices, prompt adopting strategies focused on product differentiation, including high-quality specialty coffee. Nevertheless, documented evidence shows that small producers in Oaxaca, Mexico, are not equally benefiting from this market opportunity compared to other states Veracruz or Chiapas. This review article identifies analyzes the factors integrating Oaxacan into market. A total of 138 scientific contributions were analyzed,...

Abstract While hybridization and introgression can have a strong adaptive importance, it impede divergence of species. Quercus magnoliifolia Q. resinosa are two endemic oak species distributed across the Mexican highlands. These diverged ecological morphologically; however, no nuclear genetic differentiation is evident. In this study, we determined mechanisms that shape patterns variation establish role migration in evolutionary history these To do this, Bayesian approaches were used for...