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Genetic Diversity in Yam Germplasm from Ethiopia and Their Relatedness to the Main Cultivated Dioscorea Species Assessed by AFLP Markers

^a Dep. of Crop Sciences: Agronomy in the Tropics, Georg-August-Univ. Göttingen, Grisebachstr. 6, D-37077 Göttingen, Germany
^b Dep. of Crop Sciences: Plant Breeding, Georg-August-Univ. Göttingen, Von-Siebold-Str. 8, D-37075 Göttingen, Germany
^c Hawassa Univ., P.O. Box 05, Awassa, Ethiopia

View larger version (33K): [in this window] [in a new window]   Figure 1. Dendrogram of 62 Dioscorea accessions evaluated based on Jaccard similarity coefficient and unweighted pair-group method using arithmetic means algorithm (UPGMA) clustering. Numbers in percentage indicate bootstrap values based on 1000 replicate analyses; cophenetic correlation coefficient, r = 0.99.

View larger version (30K): [in this window] [in a new window]   Figure 2. Dendrogram of 48 unidentified Dioscorea accessions from Ethiopia based on Jaccard similarity coefficient and UPGMA clustering. Numbers in percentage indicate bootstrap values based on 1000 replicate analyses; cophenetic correlation coefficient, r = 0.99.

View larger version (14K): [in this window] [in a new window]   Figure 3. Plot of the first and second principal coordinates for 62 Dioscorea accessions based on 877 polymorphic bands derived from 10 amplified fragment length polymorphism (AFLP) primer pairs.

View larger version (16K): [in this window] [in a new window]   Figure 4. Plot of the first and second principal coordinates for 48 unidentified Dioscorea accessions from Ethiopia based on 165 polymorphic bands derived from 10 AFLP primer pairs. Numbers in parentheses refer to the clusters from UPGMA analysis; = late-maturing; = early-maturing; = accessions from Areka Agricultural Research Center for which data on maturity time is not available; and • = nonflowing.