Optional Endoreplication and Selective Elimination of Parental Genomes during Oogenesis in Diploid and Triploid Hybrid European Water Frogs
Fig 1
Typical lampbrush chromosome sets from oocytes of triploid hybrid frogs with RRL and LLR genotypes and diploid hybrid frog with RL genotype.
Full lampbrush chromosome sets from oocytes of triploid hybrid frog with RRL (a,a`) and LLR (c,c`) genotypes and diploid hybrid frog with RL genotype (b,b`). Chromosome sets are represented by 13 bivalents, which have distribution of marker structures corresponding to P. ridibundus (a,a`,b,b`) or P. lessonae (c,c`) lampbrush chromosomes. Letter symbols indicate alphabetic numbering of all lampbrush chromosomes; italic type shows correspondence of identified chromosomes to genotype of parental species: r—to P. ridibundus, l—to P. lessonae. Chromosomes were counterstained with DAPI (a,b,c). Corresponding phase-contrast micrographs are shown (a`,b`,c`). Scale bars = 50 μm.