Causes of heterozygosity excess: The case of Mexican populations of Populus tremuloides

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AudienciaPúblico en generales_ES
CoberturaMéxicoes_ES
Fecha de ingreso2026-10-05T16:33:38Z
Fecha de publicación2025-01-01
ResumenThe presence of heterozygous individuals in a population is crucial for maintaining genetic diversity, which can positively affect fitness and adaptability to environmental changes. While inbreeding generally reduces the proportion of heterozygous individuals in a population, polyploidy tends to increase the proportion. North American Populus tremuloides is one of the most widely distributed and ecologically important tree species in the Northern Hemisphere. However, genetic variation in Mexican populations of P. tremuloides, including the genetic signatures of their adaptation to a variety of environments, remains largely uncharacterized. The aim of this study was to analyze how inbreeding coefficient (FIS) and ploidy are associated with clonal richness, population cover, climate and soil traits in 91 marginal to small, isolated populations of this tree species throughout its entire distribution in Mexico. Genetic variables were determined using 36,810 filtered SNPs derived from genome re-sequencing. We found that FIS was approximately between 0 and -1, indicating an extreme heterozygosity excess. One key contributor to the observed extreme heterozygosity excess was asexual reproduction, although ploidy levels cannot explain this excess. Analysis of all neutral SNPs showed that asexual reproduction was positively correlated with observed heterozygosity (Ho) but negatively correlated with expected heterozygosity (He). Analysis of outlier SNPs also showed that asexual reproduction was positively correlated with Ho and negatively correlated with He, although this latter correlation was not significant. These findings support the presence of a Meselson effect.es_ES
Doihttps://doi.org/10.1016/j.pld.2024.12.006es_ES
URIhttps://riuat.uat.edu.mx/handle/123456789/5429
Idiomaenes_ES
EditorialKEAI PUBLISHING LTDes_ES
RelaciónPlant Diversityes_ES
URL relacionadohttps://doi.org/10.1016/j.pld.2024.12.006es_ES
DerechosAcceso abierto (Metadatos de producción científica)es_ES
Licenciahttp://purl.org/coar/access_right/c_abf2es_ES
FuentePlant Diversity
Palabra claveQuaking aspenes_ES
Palabra claveDiploides_ES
Palabra claveTriploides_ES
Palabra claveAsexual reproductiones_ES
Palabra claveAdaptationes_ES
Palabra claveDeleterious SNPses_ES
TítuloCauses of heterozygosity excess: The case of Mexican populations of Populus tremuloideses_ES
TipoArtículoes_ES
ArbitradoHa sido Arbitradoes_ES
AutorHernandez-Velasco, Javier
AutorHernandez-Diaz, Jose Ciro
AutorSimental-Rodriguez, Sergio Leonel
AutorJaramillo-Correa, Juan P.
AutorGernandt, David S.
AutorVargas-Hernandez, Jose Jesus
AutorPorth, Ilga
AutorGoessen, Roos
AutorGonzalez-Elizondo, M. Socorro
AutorFladung, Matthias
AutorSaenz-Romero, Cuauhtemoc
AutorMartinez-Avalos, Jose Guadalupe
AutorCarrillo-Parra, Artemio
AutorMendoza-Maya, Eduardo
AutorBlanco-Garcia, Arnulfo
AutorWehenkel, Christian
AutorHernandez-Velasco, Javieres_ES
AutorHernandez-Diaz, Jose Ciroes_ES
AutorSimental-Rodriguez, Sergio Leoneles_ES
AutorJaramillo-Correa, Juan P.es_ES
AutorGernandt, David S.es_ES
AutorVargas-Hernandez, Jose Jesuses_ES
AutorPorth, Ilgaes_ES
AutorGoessen, Rooses_ES
AutorGonzalez-Elizondo, M. Socorroes_ES
AutorFladung, Matthiases_ES
AutorSaenz-Romero, Cuauhtemoces_ES
AutorMartinez-Avalos, Jose Guadalupees_ES
AutorCarrillo-Parra, Artemioes_ES
AutorMendoza-Maya, Eduardoes_ES
AutorBlanco-Garcia, Arnulfoes_ES
AutorWehenkel, Christianes_ES
InstituciónUniversidad Autónoma de Tamaulipas
InstituciónUniversidad Autónoma de Tamaulipases_ES
Número3es_ES
Rango de páginas415-428es_ES
URL relacionadahttps://doi.org/10.1016/j.pld.2024.12.006
Tipo de artículoIndexado
Tipo de artículoIndexadoes_ES
Volumen47es_ES

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