A vertebrate reproductive system involving three ploidy levels: Hybrid origin of triploids in a contact zone of diploid and tetraploid palearctic green toads (bufo viridis subgroup)
The rise and consequences of polyploidy in vertebrates, whose origin was associated with genome duplications, may be best studied in natural diploid and polyploid populations. In a diploid/tetraploid (2 n/4 n) geographic contact zone of Palearctic green toads in northern Kyrgyzstan, we examine 4 ns and triploids (3 n) of unknown genetic composition and origins. Using mitochondrial and nuclear sequence, and nuclear microsatellite markers in 84 individuals, we show that 4n (Bufo pewzowi) are...[Show more]
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