The historical transition of timber distribution pattern in China was presented firstly with main parts of timber flows in China,which included timber markets,timber transport system and regulations of timber transpor...The historical transition of timber distribution pattern in China was presented firstly with main parts of timber flows in China,which included timber markets,timber transport system and regulations of timber transport.Based on the overview on tropical timber flows in China,the trade flows of tropical timber from production and imports of tropical timber to export of tropical timber products were analyzed by vivid illustrations.At the same time,problems in timber trade flows in China were analysed in the end.展开更多
In the megadiverse forests of Southeast Asia, hundreds of timber species are economically important but the population genetics of only a few taxa are known. Cross-specific amplification of microsatellite loci among c...In the megadiverse forests of Southeast Asia, hundreds of timber species are economically important but the population genetics of only a few taxa are known. Cross-specific amplification of microsatellite loci among closely related taxa could enhance our ability to study and manage previously unstudied species. We successfully utilized STMS markers in Shorea platyclados, originally developed for Shorea curtisii. The six primer pairs we tried successfully produced PCR products of expected sizes. The number of alleles observed ranged from 10 to 14 and an average of 12 alleles were detected per locus. A high expected and observed heterozygosity was observed and it ranges from 0.718 to 0.827 among all populations across all six loci tested. Microsatellite DNA markers are highly polymorphic, co-dominant, reproducible, and amenable to high throughput genetic analyses. Overall, the cross- specific amplification of microsatellite loci appears to be complicated by numerous factors. While the approach may be effective for local management and conservation ofpoorly known species, the results must be carefully interpreted.展开更多
基金This paper was supported by ITTO project"Transparency in Trade Flows and Distribution of Tropical Wood Products in China"(PD171/02Rev.4).
文摘The historical transition of timber distribution pattern in China was presented firstly with main parts of timber flows in China,which included timber markets,timber transport system and regulations of timber transport.Based on the overview on tropical timber flows in China,the trade flows of tropical timber from production and imports of tropical timber to export of tropical timber products were analyzed by vivid illustrations.At the same time,problems in timber trade flows in China were analysed in the end.
基金financially supported by Texas Tech University in the form of start-up and faculty research enhancement grants
文摘In the megadiverse forests of Southeast Asia, hundreds of timber species are economically important but the population genetics of only a few taxa are known. Cross-specific amplification of microsatellite loci among closely related taxa could enhance our ability to study and manage previously unstudied species. We successfully utilized STMS markers in Shorea platyclados, originally developed for Shorea curtisii. The six primer pairs we tried successfully produced PCR products of expected sizes. The number of alleles observed ranged from 10 to 14 and an average of 12 alleles were detected per locus. A high expected and observed heterozygosity was observed and it ranges from 0.718 to 0.827 among all populations across all six loci tested. Microsatellite DNA markers are highly polymorphic, co-dominant, reproducible, and amenable to high throughput genetic analyses. Overall, the cross- specific amplification of microsatellite loci appears to be complicated by numerous factors. While the approach may be effective for local management and conservation ofpoorly known species, the results must be carefully interpreted.
