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001-es BibID:	BIBFORM079619
Első szerző:	Pecsenye Katalin (biológus)
Cím:	A possible genetic basis for vulnerability in Euphydryas maturna (Lepidoptera: Nymphalidae) / Katalin Pecsenye, Andrea Tóth, Judit Bereczki, Zoltán Varga
Dátum:	2017
ISSN:	0016-6707
Megjegyzések:	Nearly all of the known populations of Scarce Fritillary, Euphydryas maturna (Linnaeus, 1758), are declining in Western and Central Europe. In order to identify the possible reasons for its vulnerability we surveyed the population genetics of this butterfly species using multi-locus genotype data. Females of our target species lay lots of eggs in one or two batches only and pre-hibernation caterpillars live and feed gregariously in a nest. As a consequence, a random unfavourable event can eliminate most offspring of a particular female resulting in a strong genetic drift effect combined with inbreeding. Thus, our hypothesis regarding the genetic composition of Scarce Fritillary populations suggests that: (1) there will be random fluctuations in allele frequencies from generation to generation; (2) populations should exhibit small effective sizes and a relatively high level of heterozygote deficiency, and; (3) the majority of the individuals in a population will be composed of the offspring of just a few females. In order to test these hypotheses, fine-scale genetic structure was studied in two subpopulations of a Hungarian Scarce Fritillary population for 4 consecutive years (generations) using enzyme polymorphism data. The results supported all of our assumptions. We detected random fluctuation in the frequency of several alleles, small effective population size and the index of heterozygote deficiency (F IS) indicated a considerable level of inbreeding in most samples. Furthermore, average values of relatedness were also fairly high, and we were able to identify 17 putative sib families in total with the two subpopulations based on estimation of individual gametic phases. Thus, the present study suggests that intrinsic factors (e.g. specific life history) might increase the sensitivity of a species to various threatening factors (e.g. habitat loss or fragmentation) and result in the vulnerability of the given species.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban Allozyme polymorphism Gametic phase Sib families Relatedness
Megjelenés:	Genetica. - 145 : 2 (2017), p. 151-161. -
További szerzők:	Tóth Andrea Bereczki Judit (1979-) (biológus) Varga Zoltán (1939-) (professor emeritus, evolúcióbiológus, zoológus)
Pályázati támogatás:	NKFP-3 B/023/2004 egyéb OTKA K84071 OTKA
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001-es BibID:	BIBFORM023633
Első szerző:	Pecsenye Katalin (biológus)
Cím:	Enzyme activities and alcohol tolerance in isofemale lines of Drosophila melanogaster originating from different habitats / Katalin Pecsenye, Anssi Saura
Dátum:	2004
Megjegyzések:	Enzyme activity variation was studied in a Drosophila melanogaster population from two villages (Tiszafüred and Tiszaszőlős) in Hungary. Two habitats (distillery and farmyard) were sampled in both villages and 8-9 isofemale lines were established from each sample with a total of 35 lines. The activities of ADH, ?GPDH, IDH and 6PGDH were determined on starch gel after electrophoresis in 10 F1 females of each of the 35 isofemale lines. Three sublines were established from three selected isofemale lines of all four samples (altogether 36 sublines). Alcohol tolerance of the adult flies was assayed in these sublines. The activity of ADH was similar in the two habitats; so was the sensitivity to ethanol. Accordingly, no differences in adaptation to environmental ethanol were detected between the two habitats. The deviations between the two habitats in average activities and in the total variation of enzyme activities were not consistent in the two villages. These results suggest that founder effects and genetic drift are more pronounced in distilleries than selection. The association among enzyme activities varied greatly both between the two villages and between the two habitats. The two parameters of alcohol tolerance were not significantly different between the two habitats in any of the two villages.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban alcohol tolerance, enzyme activity variation, isofemale lines
Megjelenés:	Genetica. - 121 : 3 (2004), p. 277-283. -
További szerzők:	Saura, Anssi
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat DOI
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