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	Provedor de dados Agrociencia (3) Autor Molina-Freaner,Francisco (3) Espinosa-García,Francisco (2) Sarukhán-Kermez,José (2) Linares-Holguín,O. Omer (1) Sánchez-Peña,Pedro (1) Palavra-chave Acalypha indica (2) Galinsoga parviflora (2) Lopezia racemosa (2) Seed bank (2) Traditional farming systems (2) Weed demography (2) Cloroplasto (1) Diversidad genética (1) Holoparásita (1) Pholisma culiacanum (1) TrnL-F (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2016 (1) 2008 (2) País Mexico (3) Idioma Inglês (2) Espanhol (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Weed population dynamics in a rain-fed maize field from the Valley of México Agrociencia Molina-Freaner,Francisco; Espinosa-García,Francisco; Sarukhán-Kermez,José. Maize has a highly diverse weed flora in Mesoamerica, with a high proportion of native weed species. The long agricultural history of maize in Mesoamerica has imposed selection regimes that adapted native weeds to maize farming systems. These native weeds are expected to exhibit stable or increasing populations under traditional maize culture where herbicides are not used. In this paper, we study the population dynamics of major weeds occurring in a rain-fed maize field in the Valley of México. Eighteen species were recorded in the seed bank that showed a seasonal variation from 24 169 to 135 770 viable seeds m-2 . The four most abundant species represented 93% of the total seed bank and exhibited contrasting patterns of emergence that represented 2.2 to... Tipo: Info:eu-repo/semantics/article Palavras-chave: Acalypha indica; Galinsoga parviflora; Lopezia racemosa; Seed bank; Traditional farming systems; Weed demography. Ano: 2008 URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952008000500002 Diversidad genética de la región intergénica (TrnL-F) de cloroplasto en poblaciones de Pholisma culiacanum Y. Agrociencia Linares-Holguín,O. Omer; Sánchez-Peña,Pedro; Molina-Freaner,Francisco. Resumen Pholisma culiacanum es una holoparásita de raíz, endémica de los estados de Sinaloa y Sonora, México, y tiene importancia cultural, alimenticia, biológica y evolutiva. Esta planta es un modelo agrícola adecuado como fuente alternativa de nutrientes y para entender los cambios moleculares de la fotosíntesis del autotrofismo al parasitismo. El objetivo de este estudio fue analizar la diversidad genética de siete poblaciones de P. culiacanum de Sinaloa y Sonora. En 70 muestras se analizaron secuencias de un fragmento de ADN de cloroplasto (Trnt-TrnF) para calcular la variación genética dentro (86.51 %) y entre (13.49 %) poblaciones. Para los datos de distancias genéticas y geográficas se realizaron análisis de correlación y regresión lineal simple. La... Tipo: Info:eu-repo/semantics/article Palavras-chave: Holoparásita; Pholisma culiacanum; Diversidad genética; Cloroplasto; TrnL-F. Ano: 2016 URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952016000700799 Weed population dynamics in a rain-fed maize field from the Valley of Mexico Agrociencia Molina-Freaner,Francisco; Espinosa-García,Francisco; Sarukhán-Kermez,José. Maize has a highly diverse weed flora in Mesoamerica, with a high proportion of native weed species. The long agricultural history of maize in Mesoamerica has imposed selection regimes that adapted native weeds to maize farming systems. These native weeds are expected to exhibit stable or increasing populations under traditional maize culture where herbicides are not used. In this paper, we study the population dynamics of major weeds occurring in a rain-fed maize field in the Valley of México. Eighteen species were recorded in the seed bank that showed a seasonal variation from 24 169 to 135 770 viable seeds m-2. The four most abundant species represented 93% of the total seed bank and exhibited contrasting patterns of emergence that represented 2.2 to... Tipo: Info:eu-repo/semantics/article Palavras-chave: Acalypha indica; Galinsoga parviflora; Lopezia racemosa; Seed bank; Traditional farming systems; Weed demography. Ano: 2008 URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952008000600006 Registros recuperados: 3 Primeira ... 1 ... Última

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