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. 2016 Jan 8;21(1):66. doi: 10.3390/molecules21010066

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© 2016 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).

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The UPGMA dendrogram of 75 orchardgrass accessions. The symbols represent the geographic groups in cluster tree as ◆ (orange) accessions from North America, ● (brown) accessions from Asia, ■ (purple) accessions from Europe, ■ (yellow) accessions from Africa, ▲ (blue) accessions from South America, and ▼ (pink) accessions from Oceania. A–F represent the 75 orchardgrass samples could be clearly divided into six groups by the UPGMA dendrogram when the genetic coefficient was approximately 0.631.