| Revista: | Revista fitotecnia mexicana |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000368759 |
| ISSN: | 0187-7380 |
| Autors: | Sáenz Romero, Cuauhtémoc1 Rehfeldt, Gerald E2 Soto-Correa, José Carmen1 Aguilar Aguilar, Selene5 Zamarripa-Morales, Verónica3 López Upton, Javier4 |
| Institucions: | 1Universidad Michoacana de San Nicolás de Hidalgo, Instituto de Investigaciones Agropecuarias y Forestales, Tarímbaro, Michoacán. México 2United States Department of Agriculture, Mountain Research Station, Moscow, Idaho. Estados Unidos de América 3Universidad Michoacana de San Nicolás de Hidalgo, Facultad de Biología, Morelia, Michoacán. México 4Colegio de Postgraduados, Forestal, Texcoco, Estado de México. México 5Universidad Autónoma de Baja California, Instituto de Ciencias Agrícolas, Ejido Nuevo León, Baja California. México |
| Any: | 2012 |
| Període: | Abr-Jun |
| Volum: | 35 |
| Número: | 2 |
| Paginació: | 111-121 |
| País: | México |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental |
| Resumen en español | Pinus pseudostrobus Lindl. is the forest species most important economically in the state of Michoacán, at central-west México. We investigated genetic variation among P. pseudostrobus populations along an altitudinal gradient in the native indian community of Nuevo San Juan Parangaricutiro, Michoacán, México. Cones were collected from eight populations at 100 m of altitudinal intervals between 2200 m and 2900 m. Seedlings were grown for approximately two years in two shadehouse environments at Morelia, Michoacán, México and at Moscow, Idaho, USA. Total height was periodically measured during the second growing season to estimate a series of growth indexes for both locations, and dry weights were obtained only for the Morelia test. For the Moscow test there were significant differences (P < 0.05) among populations for cessation of growth, duration of the growth period, and final height. For the Morelia tests there were differences among populations for foliage, shoot and total dry weight (P < 0.025), and significant differences for stem dry weight at P = 0.055 level. There was a strong altitudinal cline for dry weight variables, with seedlings originated from populations from the lowest altitudes having more biomass (r2 = 0.80, P = 0.003). Populations separated altitudinally by about 295 m are likely to be genetically different. We suggest delineation of three altitudinal seed zones (Zone I: 2100 m to 2400 m; Zone II: 2400 m to 2700 m; Zone III: 2700 m to 3000 m), that can be translated into climatic zones delimited according to mean annual temperatures or by degree days > 5 °C. To accommodate climate change we suggest implementing assisted migration programs by transferring populations 300 m upwards to maintain adaptiveness of populations for future climates |
| Resumen en inglés | Pinus pseudostrobus Lindl. is the forest species most important economically in the state of Michoacán, at central-west México. We investigated genetic variation among P. pseudostrobus populations along an altitudinal gradient in the native indian community of Nuevo San Juan Parangaricutiro, Michoacán, México. Cones were collected from eight populations at 100 m of altitudinal intervals between 2200 m and 2900 m. Seedlings were grown for approximately two years in two shadehouse environments at Morelia, Michoacán, México and at Moscow, Idaho, USA. Total height was periodically measured during the second growing season to estimate a series of growth indexes for both locations, and dry weights were obtained only for the Morelia test. For the Moscow test there were significant differences (P < 0.05) among populations for cessation of growth, duration of the growth period, and final height. For the Morelia tests there were differences among populations for foliage, shoot and total dry weight (P < 0.025), and significant differences for stem dry weight at P = 0.055 level. There was a strong altitudinal cline for dry weight variables, with seedlings originated from populations from the lowest altitudes having more biomass (r2 = 0.80, P = 0.003). Populations separated altitudinally by about 295 m are likely to be genetically different. We suggest delineation of three altitudinal seed zones (Zone I: 2100 m to 2400 m; Zone II: 2400 m to 2700 m; Zone III: 2700 m to 3000 m), that can be translated into climatic zones delimited according to mean annual temperatures or by degree days > 5 °C. To accommodate climate change we suggest implementing assisted migration programs by transferring populations 300 m upwards to maintain adaptiveness of populations for future climates |
| Disciplines | Agrociencias, Geociencias |
| Paraules clau: | Silvicultura, Ciencias de la atmósfera, Genética, Pinus pseudostrobus, Cambio climático, Migración asistida, Variación genética altitudinal, Zonificación altitudinal, Semillas |
| Keyword: | Agricultural sciences, Earth sciences, Silviculture, Atmospheric sciences, Genetics, Pinus pseudostrobus, Climate change, Assisted migration, Altitudinal genetic variation, Altitudinal zonation, Seeds |
| Text complet: | Texto completo (Ver PDF) |
