153631 20251017144554.0 doi 10.1007/s10722-019-00828-z sideral 116842 ART-2020-116842 eng Díaz, A. Universidad de Zaragoza (orcid)0000-0001-7297-1699 The emergence of a new weed in maize plantations: characterization and genetic structure using microsatellite markers 2020 Access copy available to the general public Unrestricted The objective of this work was to assess the genetic variability and structure of a new weed in Spanish maize fields, and investigate its geographical patterns using 17 microsatellites. Commercial maize varieties (C), maize-like weeds (MLW), putative hybrids with C (WCH), and teosintes (Tm: Zea mays ssp. mexicana and Tp: Z. mays ssp. parviglumis) were analyzed. The weed genetic diversity (MLW and WCH: 0.52) was the lowest (C: 0.59, Tm: 0.66, and Tp: 0.71). Weeds (0.21) and teosintes (Tm: 0.27, Tp: 0.34) showed positive values for the inbreeding coefficient (FIS), which agrees with their low values for the observed heterozygosity (HO), common in wild species; whereas C exhibited a negative FIS value (- 0.06, excess of heterozygous), common in domesticated species. Major clustering agreed with the different types of samples, even if some of the most hybridized weeds branched with the C cluster. Within the weeds, an evident tendency to group together depending on their geographical origin was perceived. Structure analyses confirmed the contribution of C to the genome of those weeds with the highest degree of hybridization. Consistently, the genetic variation (FST) was not negligible only when the teosintes were compared to the C group. Most of the molecular variance occurred within populations (51.83%) and not among populations (10.09%), with the highest value (32.33%) being found within the weed population. These new weeds seem to have a complex origin. Even if they are related to both, C and teosintes (Tm and Tp), they form an unidentified and genetically distinct group (FST: 0.13). info:eu-repo/grantAgreement/ES/INIA/ERTA-2014-00011-C02 info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es 1.524 2020 AGRONOMY 52 / 91 = 0.571 2020 Q3 T2 PLANT SCIENCES 148 / 235 = 0.63 2020 Q3 T2 0.474 2020 Agronomy and Crop Science 2020 Q2 Plant Science 2020 Q2 Genetics 2020 Q2 Ecology, Evolution, Behavior and Systematics 2020 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Taberner, A. Vilaplana, L. 5011 705 Universidad de Zaragoza Dpto. CC.Agrar.y Medio Natural Área Producción Vegetal 67 (2020), 225-239 Genet. resour. crop evol. GENETIC RESOURCES AND CROP EVOLUTION 0925-9864 1349876 http://zaguan.unizar.es/record/153631/files/texto_completo.pdf Versión publicada 1738774 http://zaguan.unizar.es/record/153631/files/texto_completo.jpg?subformat=icon icon Versión publicada https://www.scopus.com/inward/record.uri?eid=2-s2.0-85073951922&doi=10.1007%2fs10722-019-00828-z&partnerID=40&md5=9f775322f416a4e4f5c72c055ea1c2da Texto completo de la revista oai:zaguan.unizar.es:153631 articulos driver 2025-10-17-14:12:35 ARTICLE