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Molecular Ecology · 2009 · Vol. 18 · Issue 19 · Wiley
Theory predicts that parallel evolution should be common when the number of beneficial mutations is limited by selective constraints on protein structure. However, confirmation is scarce in natural populations. Here we studied the major haemoglobin genes of eight Andean duck lineages and compared them to 115 other waterfowl species, including the bar‐headed goose ( Anser indicus ) and Abyssinian blue‐winged goose ( Cyanochen c...