TSitologiya i Genetika 2023, vol. 57, no. 1, 55-67
Cytology and Genetics 2023, vol. 57, no. 1, 44–54, doi: https://www.doi.org/https://doi.org/10.3103/S0095452723010085

Reproduction and the evolutionary potential of the hybrid form Pelophylax esculentus-ridibundus (amphibia, ranidae) within the drainages of Pripyat, Dnister and Southern Boug rivers

Morozov-Leonov S.Yu.

  • Schmalhausen Institute of Zoology Khmelnitsky st., 15, Kiev-30, GSP, 01601 Ukraine

SUMMARY. The genetic diversity of the marsh frog Pelophylax ridibundus populations and the hemiclonal structure of the hybrid form Pelophylax esculentus-ridibundus within the drainages of Prypiat, Dniester and Southern Buh rivers were analyzed. The absence of a single evolutionary scenario for this hybrid form within the borders of the region has been revealed. The conservation of the basic level of parental species evolutionary potential and the interpopulation differention of the hybrid form within the drainages of Dniester and Southern Buh rivers was demonstrated. At the same time, in the populations of P. esculentus-ridibundus from the Prypiat basin, a loss of evolutionary potential was revealed (in the southern part by 31 %, in the northern part by 69 %). It was revealed that the reason for this was the tendency to the extinction of rare haplotypes and the expansion of the mass ones. It was also demonstrated that there was a significant increase (9–10 times) in the interpopulation differentiation of the hybrid form from the Prypiat river drainage compared with sympatric populations of the parental species P. ridibundus. It was shown that the evolutionary potential loss of the hybrid form P. esculentus-ridibundus accelerated in the absence of parental species, which confirms the hypothesis about regular hybridization as an effective mechanism to compensate for the loss of evolutionary potential.

Keywords: Pelophylax, hybrid form, hemiclonal inheritance, evolutionary potential, loss of genetic diversity

TSitologiya i Genetika
2023, vol. 57, no. 1, 55-67

Current Issue
Cytology and Genetics
2023, vol. 57, no. 1, 44–54,
doi: https://doi.org/10.3103/S0095452723010085

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