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Diploid-Triploid Mosaicism: An Unusual Phenomenon in Side-Necked Turtles ( Platemys platycephala )

1985; American Association for the Advancement of Science; Volume: 227; Issue: 4694 Linguagem: Inglês

10.1126/science.227.4694.1591

1095-9203

John W. Bickham, Priscilla K. Tucker, John M. Legler,

Turtle Biology and Conservation

Diploid and diploid-triploid mosaic individuals of Platemys platycephala were found in natural populations. In mosaic specimens, the blood, spleen, liver, and testis contained both diploid and triploid cells. The ratio of triploid to diploid cells was more variable among individuals than among somatic tissues within an individual. Only diploid cells underwent meiosis in males; haploid gametes were produced. There appears to be geographic variation for mosaicism in that only diploids were found in Bolivia, whereas diploids and diploid-triploid mosaics occured in Surinam.