Unusual distribution of constitutive heterochromatin (C-bands) in the somatic chromosomes of a passerine birdErithacus svecicus

Bhunya, Sourav; Sultana, Tahera

doi:10.1007/bf01972283

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…7 and 8 appeared entirely heterochromatic as well as W sex chromosome. This unusual distribution of constitutive hetrochromatin on somatic chromosomes was previously reported by some studies on aves as in ducks (Ata et al, 2019), passerine bird Erithacus savecicus (Bhunya and Sultana, 1982). However, there is no sufficient evidence illustrate this phenomenon.…”

Section: Discussionmentioning

confidence: 50%

First constitutive heterochromatin characterization and Karyotype of white stork Ciconia ciconia (Aves: Ciconiidae)

Shnaf

Al‐Khalifa

2023

Braz. J. Biol.

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The karyotype and constitutive heterochromatin pattern of the white stork Ciconia ciconia samples obtained from Manzala lake, Dimiaat, Egypt was described. Somatic cells of Ciconia ciconia samples have diploid number 2n= 68 chromosomes. Out of 68 chromosomes, 11 pairs including sex chromosomes were macrochromosomes and the remaining pairs were microchromosomes. Of the 11 macrochromosome pairs, no.1, 2, 4 and 5 were submetacentric and pairs no. 6, 7 and 8 were described as metacentric. In addition, the autosome pair no.3 was subtelocentric, while autosome pair no.9 was acrocentric. Also, the sex chromosome Z represents the fourth one in size and it was classified as submetacentric while, W chromosome appeared as medium size and was acrocentric. Furthermore, C-banding pattern (constitutive heterochromatin) revealed variation in their sizes and occurrence between macrochromosomes. Pairs no. 7 and 8 of autosomes exhibited unusual distribution of heterochromatin, where they appeared as entirely heterochromatic. This may be related to the origin of sex chromosomes Z and W. However, there is no sufficient evidence illustrate the appearance of entirely heterochromatic autosomes. Therefore, there is no available cytogenetic literature that describes the C-banding and karyotype of Ciconia Ciconia, so the results herein are important and may assist in cytogenetic study and evolutionary pattern of Ciconiiformes.

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Section: Discussionmentioning

confidence: 50%

First constitutive heterochromatin characterization and Karyotype of white stork Ciconia ciconia (Aves: Ciconiidae)

Shnaf

Al‐Khalifa

2023

Braz. J. Biol.

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“…Chromosome preparation from bone marrow cells was done following Ford and Hamerton (1956) and Bhunya and Sultana (1979). The Cbanding was done following Sumner (1972) and Bhunya and Sultana (1982). Morphometric analysis of chromosomes was done in accordance with Levan et al (1964).…”

Section: Methodsmentioning

confidence: 99%

Karyological study of one charadriiform and two passerine Indian birds

Bhunya

Mohanty

1987

Genetica

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The karyotypes of one charadriiform bird, Himantopus himantopus himantopus (Linnaeus) (Recurvirostridae) and two passerine birds, Chloropsis cochinchinensis jerdoni (Blylh) (lrenidae) and Melophus lathami (Gray) (Emberizidae), hithertho cytologically unknown have been studied. The diploid chromosome number (2n) is 82 + in H. h. himantopus and 80 +_ in both C. c. jerdoni and ,'v/. lathami. The Z and W chromosomes were identified except in H. h. himantopus. C-banding analysis in C. c. jerdoni shows almost the entire W chromosome and the short arm of the 5th chromosome to be completely heterochromatic. Possible karyological relationships among congeneric and confamilial species are discussed.

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Phylogenetic relationships of turacos (Musophagidae; Cuculiformes) based on comparative chromosome banding analysis

Tuinen

Valentine²

1986

Ibis

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Cladistic analysis of chromosome banding patterns in nine species of turacos (Musophagidae; Cuculiformes) revealed the existence of two clades, one comprised of species of the genera Tauraco, Gallirex (=Tauraco) and Musophaga, and another of species of Corythaixoides. The results are consistent with the allocation of the former to a subfamily Tauracinae and the allocation of the latter to the subfamily Criniferinae which also includes Crinifer. Comparative C‐banding suggests that the putatively polytypic Tauraco corythaix is occupied by more than one species; more such studies in this group may resolve other questionable cases of conspecificity. Comparison of our results to studies of Cuculidae suggest that they do not share with musophagids two major derived fissions that set musophagids apart from other avian orders. Detailed comparison of ancestral karyotypes from several groups (Galliformes, Cuculidae, Musophagidae and Opisthocomidae) may help to resolve their still unresolved phylogenetic relationships. Our results confirm previous studies showing karyotypic uniformity within avian orders. The uniformity suggests a negligible role for chromosome rearrangement in speciation in this group, since several indisputably distinct species do not differ karyotypically in any significant fashion. Intraspecific uniformity is punctuated by the presence in Livingstone's turaco Tauraco corythaix livingstonii of inversion heteromorphism, the class of rearrangement encountered most frequently in other avian species.

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Unusual distribution of constitutive heterochromatin (C-bands) in the somatic chromosomes of a passerine birdErithacus svecicus

Cited by 3 publications

References 17 publications

First constitutive heterochromatin characterization and Karyotype of white stork Ciconia ciconia (Aves: Ciconiidae)

First constitutive heterochromatin characterization and Karyotype of white stork Ciconia ciconia (Aves: Ciconiidae)

Karyological study of one charadriiform and two passerine Indian birds

Phylogenetic relationships of turacos (Musophagidae; Cuculiformes) based on comparative chromosome banding analysis

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