| allurin and egg jelly coat impact on in-vitro fertilization success of endangered albanian water frog, pelophylax shqipericus. | amphibian egg-jelly coat plays an important role in successful fertilization and development. here, we ask whether proteins like allurin in the jelly coats of frog eggs might influence fertilization rate success. using in vitro fertilization of albanian water frog, pelophylax shqipericus, we found that body cavity eggs or eggs deprived of jelly coat were not fertilized, compromising the success of in vitro fertilization procedure. when de-jellied eggs were inseminated with sperm suspension, the ... | 2020 | 30445855 |
| characterization of albanian water frog, pelophylax shqipericus, sperm traits and morphology, by using phase contrast microscopy. | mature spermatozoa traits and morphology of endangered albanian water frog, pelophylax shqipericus, have been characterized for the first time through phase contrast microscopy, as part of successful implementation of in vitro fertilization technique for this species. the basic morphology of p. shqipericus spermatozoa consists of an elongated, thick, smooth-edged, and solid-staining head, continuing with a thin and long tail which usually extends 2.48 times the head length. the acrosome was not ... | 2019 | 31313452 |
| genomes of two water frog species resist germ line exclusion in interspecies hybrids. | abundant natural interspecies hybrids between the european water frog rana ridibunda and at least three other taxa reproduce hemiclonally, by hybridogenesis: the non-ridibunda genome is excluded in the germ line before meiosis, and the unrecombined ridibunda genome is transmitted to haploid gametes. in contrast, natural hybrids between rana ridibunda and either of two balkan species (rana shqiperica and rana epeirotica) do not show such genome exclusion. this plausibly results from failure of ba ... | 1997 | 9293641 |
| linkage groups of protein-coding genes in western palearctic water frogs reveal extensive evolutionary conservation. | among progeny of a hybrid (rana shqiperica x r. lessonae) x r. lessonae, 14 of 22 loci form four linkage groups (lgs): (1) mitochondrial aspartate aminotransferase, carbonate dehydratase-2, esterase 4, peptidase d; (2) mannosephosphate isomerase, lactate dehydrogenase-b, sex, hexokinase-1, peptidase b; (3) albumin, fructose-biphosphatase-1, guanine deaminase; (4) mitochondrial superoxide dismutase, cytosolic malic enzyme, xanthine oxidase. fructose-biphosphate aldolase-2 and cytosolic aspartate ... | 1997 | 9286685 |
| rrs1-like sequences of water frogs from central europe and around the aegean sea: chromosomal organization, evolution, possible function. | rrs1-like sequences of water frogs (genus pelophylax) display varied genomic organization, whereas the centromeric hybridization pattern reveals species-specific differences. using fluorescent in situ hybridization, pelophylax cf. bedriagae, pelophylax kurtmuelleri, and pelophylax ridibundus showed a hybridization signal at centromeres of chromosomes 1-5, but in p. kurtmuelleri the medium-small chromosome labeled was 10 rather than 8. pelophylax cretensis had almost 16 of 26 centromeres labeled, ... | 2011 | 21424546 |