Origins and genetic conservation of tropical trees in agroforestry systems: a case study from the Peruvian Amazon
Origins and genetic conservation of tropical trees in agroforestry systems: a case study from the Peruvian Amazon
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DOI：
10.1007/s10592-007-9348-5
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发表时间：
2008-01-01
影响因子：
2.2
通讯作者：
Pennington, R. Toby
中科院分区：
文献类型：
--
作者：
Dawson, Ian K.;Hollingsworth, Peter M.;Pennington, R. Toby
目前，在秘鲁亚马逊地区广泛的农林生态系统中发现了数百种本地树种，形成了重要的生物多样性库。为了进一步促进保护，鼓励农民用从当地森林收集的种子补充这些种群的种内遗传多样性。然而，对于某些树种，这种方法可能是不合适的，因为农场已经发现的这些分类群的林分可能不是本地起源的。尽管这一问题对保护具有重要意义，但该地区栽培树木的历史信息很少，我们在这里纠正重要果树Inga edulis的情况。基于核SSR和叶绿体DHPLC分析密切的地理位置匹配的自然和种植的立场在五个网站，看来，栽培材料的美味主要是非本地的起源，这表明保护新的大规模的输液从当地的野生林到农场可能是不适当的，在该地区。虽然核和叶绿体多样性都较低，在人工林，值仍然相对较高（类似的80%和70%的天然林，分别），表明当农民种植树木，良好的收集种子的做法，从已经种植的I。edulis应是确保农场长期养护的有效手段。
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 L 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 (similar to 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.