First karyotypical description of two American Ciconiiform birds, Mycteria americana (Ciconiidae) and Platalea ajaja (Threskiornithidae) and its significance for the chromosome evolutionary and biological conservation approaches

Francisco, Mercival R.; Galetti, Pedro Manoel

doi:10.1590/s1415-47572000000400015

Cited by 6 publications

(9 citation statements)

References 13 publications

(20 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, 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. Francisco and Galetti Junior (2000) reported that Mycteria americana had a diploid number 2n=72, which was karyotypically similar to the previously described Mycteria cinerea (Belterman and Boer, 1990). In addition, (Belterman and Boer, 1990) Mycteria cinerea (2n=72) may represent the ancestral karyotype of Ciconiids.…”

Section: Constitutive Heterochromatin Description (C-banding)supporting

confidence: 75%

“…In the present study, results of karyotype revealed that of 68 chromosomes, 11 pairs, including sex chromosomes are macrochromosomes, while the remaining pairs are microchromosomes. Of the 10 autosomes macrochromosome, pairs no.1, 2, 4 and 5 were submetacentric that was in disagreement with Francisco and Galetti Junior (2000) in Mycteria americana (Ciconidae). On contrary, results here in was in agreement with Francisco and Galetti Junior (2000) in Mycteria americana (Ciconidae) in which chromosome pair no.3 was subteloceentric; pair no.9; W chromosome was telocentric and Z chromosome was submetacentric.…”

Section: Discussionmentioning

confidence: 85%

“…Moreover, the karyotype pattern of Threskiornithids is derived from that of Ciconiids (Takagi and Sasaki, 1974). The karyotypes of Brazilian species of Mycteria americana (Ciconiidae) and Platalea ajaja (Threskiornithidae) are described by Francisco and Galetti Junior (2000). The avian genome should be concerned with more knowledge because of the economic and biological importance of birds; their successful evolution.…”

Section: Karyotypementioning

confidence: 99%

“…However, this opinion was doubted, because there was no sufficient evidence showing which came first, the ability to fly, or the decrease in genome size (Gregory, 2002;Waltari and Edwards, 2002). The decreasing in number of microchromosomes may be a common chromosome evolutionary strategy in some bird groups (Francisco and Galetti Junior, 2000).…”

Section: Constitutive Heterochromatin Description (C-banding)mentioning

confidence: 99%

See 3 more Smart Citations

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

Shnaf

Al‐Khalifa

2023

Braz. J. Biol.

View full text Add to dashboard Cite

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.

show abstract

Section: Constitutive Heterochromatin Description (C-banding)supporting

confidence: 75%

Section: Discussionmentioning

confidence: 85%

Section: Karyotypementioning

confidence: 99%

Section: Constitutive Heterochromatin Description (C-banding)mentioning

confidence: 99%

See 2 more Smart Citations

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

Shnaf

Al‐Khalifa

2023

Braz. J. Biol.

View full text Add to dashboard Cite

show abstract

“…Although some authors have suggested chromosomal similarities between Cathartidae and Ciconiiformes (Ligon 1967;Takagi and Sasaki 1974), it is important to consider that New World Vultures share a common karyotype with most birds. Although many Ciconiiformes show bimodal karyotypes, with lower diploid numbers ranging between 52 and 72 (Francisco and Galleti 2000), they still have a bimodal organization, with a clear distinction between macro and microchromosomes.…”

Section: Discussionmentioning

confidence: 99%

Chromosomal analysis in Cathartidae: distribution of heterochromatic blocks and rDNA, and phylogenetic considerations

et al. 2008

View full text Add to dashboard Cite

Three species of Cathartidae (Sarcoramphus papa, Cathartes aura and Cathartes burrovianus) were cytogenetically characterized by G- and C-banding. 18S-28S rDNA was used as a probe to map major ribosomal clusters. These species showed very similar karyotypes, with 2n = 80, 10 pairs of macrochromosomes, a submetacentric Z and a metacentric W chromosome. However, differences were found in the amount and distribution of heterochromatic blocks: S. papa showed heterochromatin only in the pericentromeric region and in chromosome W, while both species of Cathartes had heterochromatic blocks also in the long arm of two acrocentric pairs. Ribosomal clusters were found in a small pair in all three species. Karyotype analysis in Cathartidae revealed that this family has retained similarities to the putative avian ancestral karyotype, and placed Cathartidae in a more basal position in relation to Accipitridae and Falconidae. However, the cytogenetic data still cannot clarify the phylogenetic relationship between this family and other groups, such as Ciconiidae, considered its sister-group according to nucleic acid hybridization studies.

show abstract

Chromosome-level genome of the wood stork (Mycteria americana) provides insight into avian chromosome evolution

Flamio,

Ramstad

2023

Journal of Heredity

View full text Add to dashboard Cite

Despite being quite specious (~10,000 extant species), birds have a fairly uniform genome size and karyotype (including the common occurrence of microchromosomes) relative to other vertebrate lineages. Storks (Family Ciconiidae) are a charismatic and distinct group of large wading birds with nearly worldwide distribution but few genomic resources. Here we present an annotated chromosome-level reference genome and chromosome orthology analysis for the wood stork (Mycteria americana), a species that has been federally protected under the Endangered Species Act since 1984. The annotated chromosome-level reference assembly was produced using the blood of a wild female wood stork chick, has a length of 1.35 Gb, a contig N50 of 37 Mb, a scaffold N50 of 80 Mb, and a BUSCO score of 98.8%. We identified 31 autosomal pairs and two sex chromosomes in the wood stork genome, but failed to identify four additional autosomal microchromosomes previously found via karyotyping. Orthology analyses confirmed reported synapomorphies unique to storks and identified the chromosomes participating in these fusions. This study highlights the difficulty and potential problems associated with delineating microchromosomes in reference genome assemblies. It also provides a foundation for studying karyotype evolution in the core water bird clade that includes penguins, albatrosses, storks, cormorants, herons, and ibises. Finally, our reference genome will allow for numerous genomic studies, such as genome-wide association studies of local adaptation, that will aid in wood stork conservation.

show abstract

First karyotypical description of two American Ciconiiform birds, Mycteria americana (Ciconiidae) and Platalea ajaja (Threskiornithidae) and its significance for the chromosome evolutionary and biological conservation approaches

Cited by 6 publications

References 13 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)

Chromosomal analysis in Cathartidae: distribution of heterochromatic blocks and rDNA, and phylogenetic considerations

Chromosome-level genome of the wood stork (Mycteria americana) provides insight into avian chromosome evolution

Contact Info

Product

Resources

About