Spatial genetic structure in fourPinusspecies in the Sierra Madre Occidental, Durango, Mexico
| Autor: | Javier Hernández-Velasco, José Ángel Prieto-Ruíz, José Ciro Hernández-Díaz, Christian Wehenkel, Álvaro Cañadas-López, Matthias Fladung |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Global and Planetary Change Pinus discolor Ecology biology Forestry biology.organism_classification Spatial distribution 010603 evolutionary biology 01 natural sciences Gene flow Pinus 03 medical and health sciences 030104 developmental biology Geography Genetic structure Pinus cembroides |
| Zdroj: | Canadian Journal of Forest Research. 47:73-80 |
| ISSN: | 1208-6037 0045-5067 |
| Popis: | In this study, we examined the spatial genetic structure (SGS) in extensively managed, but naturally regenerated forest stands of Pinus cembroides Zucc., Pinus discolor Bailey et Hawksworth, Pinus durangensis Martínez, and Pinus teocote Schiede ex Schltdl. & Cham. at local (within the stands) and large (among the stands) scales using amplified fragment length polymorphisms (AFLP), with respect to conservation and sustainable management of genetic resources of these species. Because these four pine species grow in different landscape structures, we expected to find differences in their SGS, although all of them are widely spread, wind pollinated, and often occur at high population densities. At the local scale, there was no evidence of significant SGS in the four species under study (except in 1 out of 18 seed stands), suggesting that the genetic variants of these species are almost always randomly distributed in space, probably due to high wind pollination and seed dispersal. At a larger scale, the significant SGS found may be the result of isolation by distance among populations. We recommend (i) establishing a tight network of seed stands, with a maximum distance of 3–11 km between seed stands, to prevent greater loss of local genetic structure, and (ii) using these seeds to establish reforestations within a maximal radius of 3–5 km from seed provenances. |
| Databáze: | OpenAIRE |
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