UTTER ET AL.: GENETIC POPULATION STRUCTURE OF CHINOOK SALMON 



12 3 4 5A 5B 6 7aA8B 8C8D 8E 



MaiOf dendrogram clusters 



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Figure 2.— Dendrogram and nine population units formulated from allele frequency data of this study. Popula- 

 tions are approximately located by numbered squares which identify membership in clusters on the superimposed 

 genetic distance dendrogram. An exception is the most northern location of Unit I (Babine River) which lies beyond 

 map range. Dotted line represents maximum glaciation during late Pleistocene (McPhail and Lindsey 1986). 



245 



