Supernumerary chromosome segments in different genera of formicidae

Palomeque, Teresa; Chica, Eduardo J.; Guardia, R. Díaz de la

doi:10.1007/bf01435174

Cited by 10 publications

(6 citation statements)

References 28 publications

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“…(1996 ) on DNA satellite amount. In the ant T. nigerrimum , the occurrence of a supernumerary segment also seems to be caused by the duplication of repeated DNA ( Palomeque et al ., 1993 ). The nucleolar DNA sequences also have an important propensity for self duplication and accretion.…”

Section: Discussionmentioning

confidence: 99%

The chromosomes of Diprion pini and D. similis (Hymenoptera: Diprionidae): implications for karyotype evolution

et al. 1998

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Earlier cytological investigations characterize the family Diprionidae with a modal chromosome number of seven. This study shows that Diprion pini and D. similis have 14 acrocentric chromosomes (n = 14 for haploid males and 2n = 28 for diploid females). In D. pini, rRNA genes are located on the satellite and the round short arm of the chromosome carrying this segment. We studied six populations with no evidence of chromosomal polymorphism at the species level. Our results disagree with those published previously and reopen the question of karyotype evolution. Chromosome morphology, ISH and C-banding results support the hypothesis of chromosome number doubling by centric fission and not by polyploidization, followed by the growth of short arms by means of pericentromeric DNA amplification.

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Section: Discussionmentioning

confidence: 99%

The chromosomes of Diprion pini and D. similis (Hymenoptera: Diprionidae): implications for karyotype evolution

et al. 1998

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“…The origin of supernumerary chromosomes is most often unknown and conflicting theories have been raised at this respect. Most authors accept the hypothesis that these chromosome segments emerge from elements of the standard complement (Camacho and Cabrero 1987;Palomeque et al 1993;Jesus et al 2003;Artoni et al 2006). Other theories state that the B chromosome is not derived from such elements and a heterologous origin is proposed to explain the emergence of the giant B chromosome in Alburnus alburnus, in which this chromosome is made up of dispersed retrotransposon repetitive DNA (Ziegler et al 2003).…”

Section: Origin and Meiotic Behaviour Of The B Chromosome In Astyanaxmentioning

confidence: 96%

New insights on the origin of B chromosomes in Astyanax scabripinnis obtained by chromosome painting and FISH

et al. 2011

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Chromosome painting (CP) with a probe of B chromosome obtained by microdissection and fluorescence in situ hybridization (FISH) with probes of As51 satellite DNA, C( o )t-1 DNA, and 18S and 5S rDNA confirmed sharing of some repetitive DNA but not rDNA between A and B chromosomes in the fish Astyanax scabripinnis. Meiotic analysis revealed a pachytene B chromosome bivalent nearly half the size of its mitotic configuration, suggesting a self-pairing of B chromosome arms. Such an isochromosome nature of somatic B chromosome was further evidenced by CP and FISH. All the findings obtained suggest (i) intraspecific origin of B chromosome, and (ii) evolutionary enrichment of repetitive DNA classes, especially those contained in the C( o )t-1 and the As51 probes, in B chromosome. However, the precise origin of B chromosome in the present species remains to be elucidated by further molecular cytogenetic analysis because of painting of some A chromosome regions with the B chromosome-derived probe.

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“…All centromeric regions show a negative Gbanding response. Chromosome 8 of T. nigerrimum carries C-banded heterochromatin in part or almost all of its short arm (Palomeque et al 1988(Palomeque et al , 1993. Figure 1 also shows a composite Gbanded karyotype with different degrees of chromosome condensation and different banding patterns.…”

Section: Resultsmentioning

confidence: 99%

“…Previous cytogenetic studies in ants have been carried out by Crozier (1975), Palomeque et al (1988Palomeque et al ( , 1990Palomeque et al ( , 1993, Hirai et al (1994) and Imai et al (1994), among others. Until now only C-banding and nucleolar organizer region (NOR) banding have been applied in ants.…”

Section: Introductionmentioning

confidence: 99%

G-banding and chromosome condensation in the ant,Tapinoma nigerrimum

Lorite

Chica²,

Palomeque

1996

Chromosome Res

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Well-defined G-bands were obtained on metaphase chromosomes from Tapinoma nigerrimum using trypsin and warm 2 x SSC in sequence. The G-banded pattern allowed the identification of all chromosomes. Evidence for asynchronous condensation of the chromosomes of this species is provided. Different banding patterns were obtained when metaphase chromosomes were stained with DA/DAPI alone and with DA/DAPI after a standard G-banding procedure. The G-banding phenomenon is discussed using the result obtained.

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Supernumerary chromosome segments in different genera of formicidae

Cited by 10 publications

References 28 publications

The chromosomes of Diprion pini and D. similis (Hymenoptera: Diprionidae): implications for karyotype evolution

The chromosomes of Diprion pini and D. similis (Hymenoptera: Diprionidae): implications for karyotype evolution

New insights on the origin of B chromosomes in Astyanax scabripinnis obtained by chromosome painting and FISH

G-banding and chromosome condensation in the ant,Tapinoma nigerrimum

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