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Fishery Bulletin 99(1 ) 
Figure 1 
Map of the Fraser River watershed showing locations of chinook salmon populations with 
inset of the map of British Columbia. Numbers are placed at the collection sites where 
the populations were obtained: 1 = Harrison, 2 = Chilliwack-white, 3 = Chilliwack -red, 4 = 
Chehalis-red, 5 = Bridge, 6 = Coldwater, 7 = Nicola, 8 = Lower Shuswap, 9 = Middle Shus- 
wap, 10 = Eagle, 11 = Chilko, 12 = Quesnel, 13 = Stuart, 14 = Nechako, 15 = Cottonwood, 
16 = Bowron, 17 = Holmes, 18 = Tete Jaune, 19 = Indianpoint, 20 = Slim. 
quencies in the presence of a null allele were generated by 
using the maximum likelihood method of the utilities op- 
tion in GENEPOP. The data set with corrected allele fre- 
quencies was tested in a NJ dendrogram analysis. 
Results 
Pedigree analysis and allele assignment 
All loci displayed normal Mendelian inheritance; each hetero- 
zygous parent (two allele bands) passed each of its two bands 
to approximately 50% of its offspring, and each homozygous 
parent (one allele band) passed its single band to 100% of its 
offspring. Assignment of alleles was based on the empirically 
determined standard error of band size estimation as 
reported in Table 3. The size range for each allele was set to 
allow for 95% confidence of allele assignment. 
Heterozygosity and allele frequencies 
Heterozygosity was consistently high at Ots 10 1 and Ots 100 
(Table 1), ranging from 0.636 to 0.975 at Ots 101(0. 86 aver- 
age), and from 0.80 to 0.947 (0.88 average) at OtslOO. Het- 
