HYBRID DYSFUNCTION IN FIRE-BELLIED TOADS (BOMBINA )
نویسندگان
چکیده
منابع مشابه
The maintenance of reproductive isolation in a mosaic hybrid zone between the fire-bellied toads Bombina bombina and B. variegata.
Mosaic hybrid zones arise when ecologically differentiated taxa hybridize across a network of habitat patches. Frequent interbreeding across a small-scale patchwork can erode species differences that might have been preserved in a clinal hybrid zone. In particular, the rapid breakdown of neutral divergence sets an upper limit to the time for which differences at marker loci can persist. We pres...
متن کاملPara‐allopatry in hybridizing fire‐bellied toads (Bombina bombina and B. variegata): Inference from transcriptome‐wide coalescence analyses
Ancient origins, profound ecological divergence, and extensive hybridization make the fire-bellied toads Bombina bombina and B. variegata (Anura: Bombinatoridae) an intriguing test case of ecological speciation. Previous modeling has proposed that the narrow Bombina hybrid zones represent strong barriers to neutral introgression. We test this prediction by inferring the rate of gene exchange be...
متن کاملGenetic Analysis of a Hybrid Zone between the Fire-bellied Toads, Bombina Bombina and B. Variegata, near Cracow in Southern Poland.
The fire-bellied toads Bombina bombina and B. variegata differ extensively in biochemistry, morphology, and behavior. We use a survey of five diagnostic enzyme loci across the hybrid zone near Cracow in Southern Poland to estimate the dispersal rate, selection pressures, and numbers of loci which maintain this zone. The enzyme clines coincide closely with each other and with morphological and m...
متن کاملBradykinins and their precursor cDNAs from the skin of the fire-bellied toad (Bombina orientalis).
Bradykinin and (Thr(6))-bradykinin have been identified in the defensive skin secretion of the fire-bellied toad, Bombina orientalis. The homologous cDNAs for both peptides were cloned from a skin library using a 3'- and 5'-RACE strategy. Kininogen-1 (BOK-1) contained an open-reading frame of 167 amino acid residues encoding four repeats of bradykinin, and kininogen-2 (BOK-2) contained an open-...
متن کاملVariation and Timing of the Cranial Ossification Sequence of the Oriental Fire-Bellied Toad, Bombina orientalis (Amphibia, Discoglossidae)
The sequence of appearance of the 17 different skull bones in the oriental fire-bellied toad, Bombina orientalis, is described. Data are based primarily on samples of ten or 11 laboratory-reared specimens of each of 11 Gosner developmental stages (36-46) representing middle through late metamorphosis. Ossification commences as early as stage 37 (hind limb with all five toes distinct), but the f...
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ژورنال
عنوان ژورنال: Evolution
سال: 1999
ISSN: 0014-3820
DOI: 10.1111/j.1558-5646.1999.tb05425.x