Using DNA markers to delineate populations of Yakima Basin steelhead

Introduction

Conclusions

Prosser Dam

Resident Trout

SH Population

Roza Dam SH

1) Compare a 2006 collection from Roza Dam to the previous

collections from the upper Yakima

Roza Dam Steelhead

Project Objectives

Results

• Allele frequencies for five replicated Roza Dam collections

are quite similar, and in most cases statistically equivalent.

• The AMOVA test that grouped all replicated Roza Dam

collections together minimized the proportion of variance

partitioned among collections – within groups (0.43%)


	1)These results suggest that the Roza Dam collections are from a population of sufficient size to resist stochastic fluctuation in allele frequencies over time due to genetic drift or gene flow from a genetically differentiated stock is limited.
	2)Stated differently, by grouping Roza Dam samples together, separate from other population collections, the amount of genetic variation attributed to among collection differences is the smallest observed value of 0.43%.