Wood plays a major role in land ecosystems and in human activity. Better understanding the genetic basis and evolutionary implication of wood variability are thus key issues with both ecological and economical implica...Wood plays a major role in land ecosystems and in human activity. Better understanding the genetic basis and evolutionary implication of wood variability are thus key issues with both ecological and economical implications. The present paper addresses the question of the extending and the nature of natural selection on wood related genes in Eucalyptus urophylla, a tropical tree species with key economical importance. We conducted a genetic study on an E. urophylla population from Timor Island using a set of 17 SSR characterized on a main sample of 43 individuals and six candidate genes sequenced on a subset of 18 individuals. The candidate genes include three cellulose synthase genes (EuCesA1, EuCesA2 and EuCesA3), and three genes involved in lignin synthesis (EuCAD2, EuC4H1 and EuC4H2). Based on SSR data, the investigated population appeared to have no structure and have undergone past population expansion. Accounting for this demographic history, we were able to draw neutral expectation for polymorphism distribution on candidate genes and to determine their potential selective status. We hence identified two gene portions exhibiting unexpected polymorphism pattern, consistent with natural selection imprint.展开更多
Projected climate changes will additionally increase the already significant risk of natural hazard-related disasters in Serbia and the west Balkan region as a whole.Serbia is about to introduce the strategy for clima...Projected climate changes will additionally increase the already significant risk of natural hazard-related disasters in Serbia and the west Balkan region as a whole.Serbia is about to introduce the strategy for climate change adaptation and mitigation.However,a national decision-support system for implementation of the climate change law and strategy is yet to be developed.This study contributes to the implementation of adaptation policies at subnational levels by development of a decision-support model for local-level management of the climate change adaptation process.The study explores the potential for synergetic application of multicriteria decision making analysis and probabilistic reasoning methods by focusing on Bayesian networks,analytical hierarchy processes,and geographic information systems for selection of priority adaptation measures.The study was based on the formation of causal chains,which enable linking management decisions and socioeconomic or biophysical consequences into articulated sequences of conditional relationships.A model was tested in the forestry sector,and it clearly pointed out development of an early warning system and planning of water intake basins as priority adaptation measures.Since the results are shown as a probability distribution for each alternative solutions,the model can assist decision makers with prompt evaluation of various scenarios.展开更多
文摘Wood plays a major role in land ecosystems and in human activity. Better understanding the genetic basis and evolutionary implication of wood variability are thus key issues with both ecological and economical implications. The present paper addresses the question of the extending and the nature of natural selection on wood related genes in Eucalyptus urophylla, a tropical tree species with key economical importance. We conducted a genetic study on an E. urophylla population from Timor Island using a set of 17 SSR characterized on a main sample of 43 individuals and six candidate genes sequenced on a subset of 18 individuals. The candidate genes include three cellulose synthase genes (EuCesA1, EuCesA2 and EuCesA3), and three genes involved in lignin synthesis (EuCAD2, EuC4H1 and EuC4H2). Based on SSR data, the investigated population appeared to have no structure and have undergone past population expansion. Accounting for this demographic history, we were able to draw neutral expectation for polymorphism distribution on candidate genes and to determine their potential selective status. We hence identified two gene portions exhibiting unexpected polymorphism pattern, consistent with natural selection imprint.
基金This work was supported by the Serbian Ministry of Education,Science and Technological Development through the Mathematical Institute of the Serbian Academy of Sciences and Arts.
文摘Projected climate changes will additionally increase the already significant risk of natural hazard-related disasters in Serbia and the west Balkan region as a whole.Serbia is about to introduce the strategy for climate change adaptation and mitigation.However,a national decision-support system for implementation of the climate change law and strategy is yet to be developed.This study contributes to the implementation of adaptation policies at subnational levels by development of a decision-support model for local-level management of the climate change adaptation process.The study explores the potential for synergetic application of multicriteria decision making analysis and probabilistic reasoning methods by focusing on Bayesian networks,analytical hierarchy processes,and geographic information systems for selection of priority adaptation measures.The study was based on the formation of causal chains,which enable linking management decisions and socioeconomic or biophysical consequences into articulated sequences of conditional relationships.A model was tested in the forestry sector,and it clearly pointed out development of an early warning system and planning of water intake basins as priority adaptation measures.Since the results are shown as a probability distribution for each alternative solutions,the model can assist decision makers with prompt evaluation of various scenarios.
