tailieunhanh - Báo cáo khoa học: "Genomics of Eucalyptus wood traits"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Genomics of Eucalyptus wood traits. | Ann. For. Sci. 59 2002 645-650 INRA EDP Sciences 2002 DOI forest 2002050 645 Note Genomics of Eucalyptus wood traits Gavin F. Morana Karen A. Thamarusb Carolyn A. Raymondc Deyou Qiua Tom Urena and Simon G. Southertona aCSIRO Forestry and Forest Products PO Box E4008 Kingston ACT 2604 Australia bCSIRO Forestry and Forest Products and CRC Sustainable Production Forestry PO Box E4008 Kingston ACT 2604 Australia cCSIRO Forestry and Forest Products and CRC Sustainable Production Forestry GPO Box 252-12 Hobart TAS 7001 Australia Received 5 July 2001 accepted 29 March 2002 Abstract - A major focus of our research has been on using molecular technologies to guide breeding for high value wood and fibre traits in eu-calypts. One approach has been to use genomic maps to locate and characterise QTL that control wood and fibre traits. A generic map for euca-lypts has been developed that consists of codominant markers that can be assayed across the major commercial species. Also on the map are candidate genes for traits such as flowering and wood and fibre traits. QTL have been characterised for wood density fibre length pulp yield and microfibril angle. A number of these have been validated in a related pedigree. A subset of QTL colocates with candidate genes. Research is now focussed on DNA sequence variation in different parts of these candidate genes and determining if this variation is associated with variation in wood properties. Of particular interest are genes involved in fibre development and cell wall formation. A third approach is to profile the expression of genes in the tissue of interest and determine if this relates to variation in trait performance. Microarrays are being used to relate expression of several thousand genes in xylem tissue to variation in traits such as microfibril angle and density. eucalypt linkage maps QTL candidate genes xylem microarrays Résumé - Génomique des critères de qualité du bois d eucalyptus. Notre recherche a été concentrée .