TAILIEUCHUNG - Báo cáo lâm nghiệp: "Paternity analysis of Populus nigra L. offspring in a Belgian plantation of native and exotic poplars"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Paternity analysis of Populus nigra L. offspring in a Belgian plantation of native and exotic poplars. | Ann. For. Sci. 63 2006 783-790 783 INRA EDP Sciences 2006 DOI forest 2006060 Original article Paternity analysis of Populus nigra L. offspring in a Belgian plantation of native and exotic poplars An Vanden BROECK a Joan COTTRELLb Paul QUATAERTa Peter BREYNEa Véronique STORMEc Wout BOERJANc Jos Van SLYCKENa a Institute for Forestry and Game Management IBW Research Station of the Flemish Community Gaverstraat 4 Geraardsbergen 9500 Belgium b Forest Research Northern Research Station Roslin Midlothian Scotland EH25 9SY UK c Department of Plant Systems Biology Flanders Interuniversity Institute for Biotechnology VIB Ghent University . Ledeganckstraat 35 Ghent 9000 Belgium Received 13 June 2005 accepted 6 January 2006 Abstract - Gene flow from cultivated poplar plantations into wild populations of Populus nigra L. is considered to represent a potential threat to the survival of P nigra. In this study we investigated if pollen competition of Populus nigra L. and Populus X canadensis Moench in fertilising P nigra ovules detected in a greenhouse experiment also occurs under field conditions. The results confirm non-random mating between males of P. X canadensis and P nigra in fertilizing P nigra females in the artificial species-mixed Belgian poplar stand. A paternity analysis also revealed non-random intra-specific mating patterns within P. nigra in the stand. No paternities were assigned to the male cultivar P. nigra cv. Italica. Practical implications for the conservation of wild P. nigra populations are discussed. Populus intra- and inter-specific crossing introgression conservation paternity analysis Résumé - Analyse de paternité dans des descendances de Populus nigra L. issues d une plantation belge de peupliers indigenes et exotiques. Les flux de gènes à partir des plantations de peupliers cultivés vers les populations sauvages de Populus nigra L. peut représenter une menace potentielle pour la survie de P. nigra. Dans cette étude nous avons voulu vérifier

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