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Diaz A - Autor (correspondencia)
Publicaciones > Artículo

The emergence of a new weed in maize plantations: characterization and genetic structure using microsatellite markers

Publicado en:Genetic Resources And Crop Evolution. 67 (1): 225-239 - 2020-01-01 67(1), doi: 10.1007/s10722-019-00828-z

Diaz A;


Centro de Investigación y Tecnología Agroalimentaria de Aragón - Entidad de origen
CITA Univ Zaragoza, IA2, Ctr Invest & Tecnol Agroalimentaria Aragon, Unidad Hortofruticultura, Ave Montanana 930, Zaragoza 50059, Spain - Autor o Coautor
Dept Agr Ganaderia Pesca & Alimentac, Serv Sanidad Vegetal, Ave Alcalde Rovira Roure 191, Lleida 25198, Spain - Autor o Coautor
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, INIA: E-RTA-2014-00011-C02 - Financiador
IQAC CSIC, Nanobiotechnol Diagnost Nb4D Grp, Jordi Girona 18-26, Barcelona 08034, Spain - Autor o Coautor
Nanobiotechnology for Diagnostics (Nb4D) Group, IQAC-CSIC, Jordi Girona 18-26, Barcelona, 08034, Spain - Autor o Coautor
Servicio de Sanidad Vegetal, Departamento de Agricultura, Ganadería, Pesca y Alimentación, Avenida Alcalde Rovira Roure 191, Lleida, 25198, Spain - Autor o Coautor
Unidad de Hortofruticultura, Centro de Investigación y Tecnología Agroalimentaria de Aragón, Instituto Agroalimentario de Aragón (IA2), CITA-Universidad de Zaragoza, Avenida de Montañana 930, Zaragoza, 50059, Spain - Autor o Coautor
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Resúmen: © 2019, The Author(s). 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).

Palabras clave: Diversity; Domestication; Hybridization; Mexicana; Microsatellites; Origin; Parviglumis; Patterns; Population-structure; Software; Teosinte; Weed; Zea; Zea mays l; Zea mays ssp; Zea mays ssp. mexicana; Zea mays ssp. parviglumis

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