Data/hora: 10/06/2024 03:51:27

Provedor de dados: | 115
País: | Mexico
Título: | Altitudinal genetic variation among Pinus patula populations from Oaxaca, México, in growth chambers simulating global warming temperatures
Autores: | Sáenz-Romero,Cuauhtémoc; Beaulieu,Jean; Rehfeldt,Gerald E.
Data: | 2011-05-01
Ano: | 2011
Palavras-chave: | Altitudinal gradients; Altitudinal seed zoning; Assisted migration; Climate change; Genetic differentiation.
Resumo: | Climatic change will decouple the matching between genotypes and environments. Studying the patterning of genetic variation among pine populations along altitudinal gradients under simulated climatic change temperatures, would provide insights about how to realign the present populations to future environments. Fourteen Pinus patula populations from the forests of the Native Indian Community of Ixtlán de Juárez, state of Oaxaca, México, were collected in January-March 2005 and 2006 along an altitudinal gradient (2400 m to 3050 m, one population every 50 m of altitudinal difference). Seedlings were grown in growth chambers at the Laurentides Forestry Center, Quebec city, Canada, under two temperature treatments aiming to simulate: contemporary temperature (average 17 °C) and a future global warming scenario (average 21 °C). Seedlings were evaluated after inducing a second growing season (between 8 and 12 months of age). Populations differed significantly (p≤0.001) for seedling height and aerial dry weight, and exhibited a significant (p≤0.02) although weak altitudinal clinal pattern, with populations from lower altitudes having on average taller and heavier seedlings than populations from higher altitudes (r²=0.064 and r²=0.094).
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952011000300012
Editor: | Colegio de Postgraduados
Formato: | text/html
Fonte: | Agrociencia  v.45 n.3 2011
Fonte: | info:eu-repo/semantics/openAccess