Origins and genetic conservation of tropical trees in agroforestry systems: a case study from the Peruvian Amazon |
| |
Authors: | Ian K Dawson Peter M Hollingsworth Jeff J Doyle Steve Kresovich John C Weber Carmen Sotelo Montes Terrence D Pennington R Toby Pennington |
| |
Institution: | (1) The World Agroforestry Centre (ICRAF), PO Box 30677, Nairobi, Kenya;(2) Royal Botanic Garden Edinburgh, 20a Inverleith Row, Edinburgh, EH3 5LR, UK;(3) Cornell University, Ithaca, NY 14853, USA;(4) Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB, UK;(5) Present address: Sahel Regional office, ICRAF, BP 320, Bamako, Mali;(6) Present address: Département des Sciences du Bois et de la Forêt, Pavillon Abitibi-Price, Université Laval, Quebec, QC, Canada, G1K-7P4 |
| |
Abstract: | Hundreds of native tree species are currently found in extensive agroforestry ecosystems in the Peruvian Amazon, forming an
important reservoir of biodiversity. To further promote conservation, farmers are encouraged to supplement intra-specific
genetic diversity in these populations with seed collected from local forests. For some tree species, however, this approach
may be inappropriate, as stands of these taxa already found on-farm may not be of local origin. Despite this issue being of
importance for conservation, little information is available on the history of cultivated trees in the region, a situation
that we here rectify for the important fruit tree Inga edulis. Based on nuclear SSR and chloroplast DHPLC analyses of closely geographically matched natural and planted stands at five
sites, it appears that cultivated material of I. edulis is primarily of non-local origin, indicating that conservation based on new wide-scale infusions from local wild stands into
farms may be inappropriate in the region. Although nuclear and chloroplast diversity were both lower in planted stands, values
were still relatively high (∼80 and 70% of natural stands, respectively), indicating that when farmers plant trees, good collection
practice of seed from already cultivated I. edulis should be an effective means for ensuring long-term conservation on farms. |
| |
Keywords: | DHPLC Inga edulis On-farm tree conservation Peruvian Amazon SSR |
本文献已被 SpringerLink 等数据库收录! |
|