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. 2009 Nov 17;9:131. doi: 10.1186/1471-2229-9-131

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Copyright ©2009 Kumar et al; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Differentiation by psbA-trnH spacer region barcode (Genbank Accession 1230807). This barcode was analyzed in Parthenium species, P. incanum, P. tomentosum, P. schottii, P. integrifolium, hybrid AZ101 (P. argentatum × P. tomentosum) and P. argentatum lines AZ1, AZ2, AZ3, AZ4, AZ5, AZ6, Cal6, C156, C86 and cv. 11591. UPGMA in Jukes-Cantor mode was used to construct the tree, with statistical support for tree branches evaluated by bootstrap analysis (1000 replicates), indicated above the node. Minority barcodes are indicated by #'s after the name of the line. Helianthus annuus is included as an outgroup.