Statistical challenges facing genetic barcoding

"Given a set of database..."

"I will not address problems..."

"Challenges"

Homoplasy (unrelated species)

Homoplasy (related species)

"Homoplasy is not a major..."

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"Probability og ’wrong’"

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What happens using a fixed value of k (k = # nucleotide differences between species)?

We need population genetic thinking!

Should we

Tests/procedures

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Power to reject ’wrong’ species

Basing assignment only on K₁ is NOT a good idea!

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Bayesian Approach

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Conclusions