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  • 1
    Digitale Medien
    Digitale Medien
    Karyotype of a gekkonid lizard,Eublepharis kuroiwae kuroiwae (1987)
    Springer
    Cellular and molecular life sciences 43 (1987), S. 924-925 
    Details
    ISSN: 1420-9071
    Schlagwort(e): Eublepharis k. kuroiwae ; Reptilia ; Gekkonidae ; karyotype
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Eublepharis kuroiwae kuroiwae, a morphologically primitive gecko endemic to the Ryukyu Archipelago, Japan, has 2n=24 chromosomes, with 7 large biarmed, and 1 large and 4 small uniarmed homologous pairs. This is the smallest chromosome number so far described in the family Gekkonidae. The presence of two distinct size groups, and the numerical dominance of metacentric or submetacentric pairs are also characteristic features.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01951670
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  • 2
    Digitale Medien
    Digitale Medien
    Discovery of a diploid population of theHemidactylus garnotii-vietnamensis complex (Reptilia: Gekkonidae) (1996)
    Springer
    Genetica 97 (1996), S. 81-85 
    Details
    ISSN: 1573-6857
    Schlagwort(e): diploid ; Hemidactylus garnotii-vietnamensis complex ; karyotype ; parthenogenesis ; Reptilia
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract A diploid member of the parthenogenetic gekkonid species complexHemidactylus garnotii-vietnamensis was discovered for the first time from Thailand. This gecko, seemingly unisexual and parthenogenetic, possesses 2n=2x=38 chromosomes, showing distinct heteromorphisms. The absence of bisexual congeneric species with a combination of karyomorphs to produce this karyotype indicates the occurrence of chromosomal rearrangements after the initial estabilishment of a diploid clonal lineage of hybrid origin. Results of karyotypic comparisons of the present sample and the three known triploid species belonging to theH. garnotii-vietnamensis complex suggest that a triploid karyomorph similar to that ofH. vietnamensis has first emerged through an insemination of the diploid parthenogen's egg by the sperm from a bisexual species having 44 chromosomes (all telocentric), and that the karyomorph subsequently experienced some minor chromosomal aberrations to produce the karyomorphs ofH. vietnamensis andH. garnotii. The origin of theH. stejnegeri karyotype still remains an open question for future studies.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00132584
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  • 3
    Digitale Medien
    Digitale Medien
    Chromosomal variation in the scincid genus Mabuya and its arboreal relatives (Reptilia: Squamata) (1996)
    Springer
    Genetica 98 (1996), S. 87-94 
    Details
    ISSN: 1573-6857
    Schlagwort(e): karyotype ; lygosominae ; Mabuya ; Reptilia ; systematics
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Karyotypes of four East and Southeast Asian species of the genus Mabuya and representatives of three arboreal genera considered to be closely related to the genus (Apterygodon, Dasia and Lamprolepis) are examined. Mabuya rugifera and M. rudis possess 2n=32 karyotypes, whereas M. longicaudata lacks one small chromosome pair, which makes its diploid number 30. The karyotype of M. macularia quadrifasciata from southern Thailand differs from any known scincid karyotypes, including a previously reported karyotype of the conspecific Indian population, in exhibiting a high diploid number (38) and a gradual change in size from large to small chromosomes. This suggests that M. macularia may consist of more than one biological species. Karyotypes of Apterygodon vittatus, Dasia olivacea and Lamprolepis smaragdinus, while exhibiting a close similarity to most Mabuya karyotypes, suggest the occurrence of slight rearrangements involving either the deletion of two small chromosome pairs (A. vittatus), or the change of centromeric positions in medium and small chromosomes (D. olivacea and L. smaragdinus).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00120222
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