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Los análisis del genoma de Digitaria indican que la introgestión puede impulsar la adaptación local y la resistencia
Yujie Huang1, Jian Li2,3, Zhefu Li1
1Institute of Crop Sciences & Institute of Bioinformatics, Zhejiang University, Hangzhou, China.
Nature communications
|February 12, 2026
Resumen
Las ideas genómicas revelan cómo el crabgrass (Digitaria spp.) logra herbicida y capacidad de adaptación. Las expansiones de la familia genética y la introgresión contribuyen a la resistencia a los herbicidas, ayudando a la gestión de las especies invasoras.
Área de la Ciencia:
- La genómica es la genómica.
- Biología Vegetal Biología Vegetal
- Biología evolutiva Biología evolutiva.
Sus antecedentes:
- Las hierbas de cangrejo (Digitaria spp.) Son malezas de tierras altas globalmente invasoras con alta plasticidad ecológica.
- La comprensión de su base genómica es crucial para la gestión de su maleza y adaptabilidad.
Objetivo del estudio:
- Generar un genoma de referencia telómero a telómero (T2T) para Digitaria sanguinalis y sus progenitores.
- Para investigar los fundamentos genómicos de la maleza, la adaptabilidad y la resistencia a los herbicidas del crabgrass.
Principales métodos:
- Se generaron genomas de referencia T2T para Digitaria sanguinalis, D. radicosa y D. milanjiana.
- Re-secuenciado 579 accesos de crabgrass desde China.
- Se realizaron ensayos filogenómicos, genómicos comparativos y de dosis-respuesta.
Principales resultados:
- Resolvió la historia evolutiva de Digitaria, revelando expansiones de la familia de genes específicas del linaje.
- Se observó una extensa introgestión simpátrica correlacionada con la selección ambiental.
- Identificó 19 genes candidatos para la resistencia a los herbicidas, incluido DsSOH1, con evidencia de introgresión de D. ciliaris.
Conclusiones:
- Los recursos genómicos proporcionan información sobre el éxito evolutivo y la adaptabilidad de Digitaria sanguinalis.
- Los hallazgos apoyan los estudios de evolución poliploide y ofrecen herramientas para el manejo de malezas de precisión.
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