DNA analysis is an effective method for wood identification.Obtaining sufficient quantity and quality DNA is the prerequisite.In this paper,Dalbergia odorifera T.Chen of Leguminosae sp.family was selected as material.Three methods,i.e.,modified CTAB,DNeasy Plant Mini kit(QIAGEN) and PTB(N-phenacylthiazolium bromide) were employed to extract the DNA in sapwood and heartwood.The quality and quantity of the DNA extractions in the two zones were compared to explore the proper methods for extracting DNA in diffe...