Chromosome polymorphism due to pericentric inversion in Zonotrichia capensis (Emberizidae-Passeriformes-Aves)

Rocha, Guaracy Tadeu; Lucca, Edmundo José de; Souza, E. B. De

doi:10.1007/bf00137327

Cited by 6 publications

(6 citation statements)

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“…Another possibility is that ZAL2 m may have been introduced into the white-throated sparrow population by hybridization with another species. Indeed, shared chromosomal polymorphisms are present within the Junco genus (Shields 1973), possibly on chromosome 2 (but see Rocha et al 1990), and matings between Z. albicollis and J. hyemalis have been reported (Dickerman 1961). However, our sequence analysis showed that the ZAL2 and ZAL2 m chromosomes share a much more recent common ancestor with each other than either does with J. hyemalis, making hybridization with that species an unlikely source for ZAL2 m .…”

Section: Discussionmentioning

confidence: 67%

“…However, from comparative studies in other Zonotrichia sparrows it was inferred that ZAL2 was likely the ancestral arrangement and that ZAL2 m was not a shared polymorphism, but instead arose exclusively in the white-throated sparrow lineage (Thorneycroft 1975). Although chromosomal polymorphisms have subsequently been detected in another bird in this genus, Z. capensis (Rocha et al 1990), they are distinct from ZAL2 m . The lack of evidence for ZAL2 m in other Zonotrichia sparrows may reflect insufficient sampling or that this arrangement was present in an ancestral population but retained only in the whitethroated sparrow.…”

Section: Discussionmentioning

confidence: 99%

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The Chromosomal Polymorphism Linked to Variation in Social Behavior in the White-Throated Sparrow (Zonotrichia albicollis) Is a Complex Rearrangement and Suppressor of Recombination

et al. 2008

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Variation in social behavior and plumage in the white-throated sparrow (Zonotrichia albicollis) is linked to an inversion polymorphism on chromosome 2. Here we report the results of our comparative cytogenetic mapping efforts and population genetics studies focused on the genomic characterization of this balanced chromosomal polymorphism. Comparative chromosome painting and cytogenetic mapping of 15 zebra finch BAC clones to the standard (ZAL2) and alternative (ZAL2 m ) arrangements revealed that this chromosome is orthologous to chicken chromosome 3, and that at a minimum, ZAL2 and ZAL2 m differ by a pair of included pericentric inversions that we estimate span at least 98 Mb. Population-based sequencing and genotyping of multiple loci demonstrated that ZAL2 m suppresses recombination in the heterokaryotype and is evolving as a rare nonrecombining autosomal segment of the genome. In addition, we estimate that the first inversion within the ZAL2 m arrangement originated 2.2 6 0.3 million years ago. Finally, while previously recognized as a genetic model for the evolution of social behavior, we found that the ZAL2/ZAL2 m polymorphism also shares genetic and phenotypic features with the mouse t complex and we further suggest that the ZAL2/ZAL2 m polymorphism is a heretofore unrecognized model for the early stages of sex chromosome evolution.

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Section: Discussionmentioning

confidence: 67%

Section: Discussionmentioning

confidence: 99%

The Chromosomal Polymorphism Linked to Variation in Social Behavior in the White-Throated Sparrow (Zonotrichia albicollis) Is a Complex Rearrangement and Suppressor of Recombination

et al. 2008

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“…Comparative analyses between the white-throated sparrow and its relatives can be quite revealing about genomic evolution. In the rufous-collared sparrow ( Zonotrichia capensis ), Rocha et al [ 64 ] reported polymorphisms in chromosomes 3 and 5 – also presumably due to pericentric inversions. The closely related junco exhibits polymorphisms for pericentric inversions in chromosomes 2 and 5 [ 65 ] and the white-crowned sparrow ( Z. leucophrys ) has centric rearrangements in chromosomes 3, 5, and 12 [ 66 ].…”

Section: Discussionmentioning

confidence: 99%

The value of avian genomics to the conservation of wildlife

et al. 2009

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BackgroundGenomic studies in non-domestic avian models, such as the California condor and white-throated sparrow, can lead to more comprehensive conservation plans and provide clues for understanding mechanisms affecting genetic variation, adaptation and evolution.Developing genomic tools and resources including genomic libraries and a genetic map of the California condor is a prerequisite for identification of candidate loci for a heritable embryonic lethal condition. The white-throated sparrow exhibits a stable genetic polymorphism (i.e. chromosomal rearrangements) associated with variation in morphology, physiology, and behavior (e.g., aggression, social behavior, sexual behavior, parental care).In this paper we outline the utility of these species as well as report on recent advances in the study of their genomes.ResultsGenotyping of the condor resource population at 17 microsatellite loci provided a better assessment of the current population's genetic variation. Specific New World vulture repeats were found in the condor genome. Using condor BAC library and clones, chicken-condor comparative maps were generated. A condor fibroblast cell line transcriptome was characterized using the 454 sequencing technology.Our karyotypic analyses of the sparrow in combination with other studies indicate that the rearrangements in both chromosomes 2m and 3a are complex and likely involve multiple inversions, interchromosomal linkage, and pleiotropy. At least a portion of the rearrangement in chromosome 2m existed in the common ancestor of the four North American species of Zonotrichia, but not in the one South American species, and that the 2m form, originally thought to be the derived condition, might actually be the ancestral one.ConclusionMining and characterization of candidate loci in the California condor using molecular genetic and genomic techniques as well as linkage and comparative genomic mapping will eventually enable the identification of carriers of the chondrodystrophy allele, resulting in improved genetic management of this disease.In the white-throated sparrow, genomic studies, combined with ecological data, will help elucidate the basis of genic selection in a natural population. Morphs of the sparrow provide us with a unique opportunity to study intraspecific genomic differences, which have resulted from two separate yet linked evolutionary trajectories. Such results can transform our understanding of evolutionary and conservation biology.

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“…capensis have shown that this species has 80 chromosomes ( de Lucca, 1974 ; de Lucca and Rocha, 1985 ). Polymorphisms involving two autosomal pairs were also identified, probably due to intrachromosomal rearrangements, such as inversions ( de Lucca and Rocha, 1985 ; Rocha et al , 1990 ). The polymorphisms described for Z .…”

Section: Introductionmentioning

confidence: 99%

“…capensis occur in autosomal pairs 2 and 4. Pair 2 can be acrocentric or submetacentric (2 A and 2 Sm ), while pair 4 can be acrocentric or metacentric (4 A and 4 M ) ( de Lucca and Rocha, 1985 ; Rocha et al , 1990 ). The presence of these two polymorphic pairs, with the occurrence of four chromosomal forms, allows the combination of nine different cytotypes.…”

Section: Introductionmentioning

confidence: 99%

Chromosomal polymorphism and comparative chromosome painting in the rufous-collared sparrow (Zonotrichia capensis)

et al. 2018

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Zonotrichia capensis is widely distributed in the Neotropics. Previous cytogenetic studies demonstrated the presence of polymorphisms in two chromosome pairs (ZCA2 and ZCA4). Here, we report results based on comparative chromosome painting, using probes derived from Gallus gallus and Leucopternis albicollis, focused on characterizing the chromosome organization of Z. capensis. Our results demonstrate the conservation of ancestral syntenies as observed previously in other species of passerine. Syntenies were rearranged by a series of inversions in the second chromosome as described in other Passeriformes, but in this species, by using probes derived from L. albicollis we observed an extra inversion in the second chromosome that had not previously been reported. We also report a paracentric inversion in pair 3; this chromosome corresponds to the second chromosome in Zonotrichia albicollis and may indicate the presence of ancestral inversions in the genus. The chromosomal inversions we found might be important for understanding the phenotypic variation that exists throughout the distribution of Z. capensis.

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Chromosome polymorphism due to pericentric inversion in Zonotrichia capensis (Emberizidae-Passeriformes-Aves)

Cited by 6 publications

References 14 publications

The Chromosomal Polymorphism Linked to Variation in Social Behavior in the White-Throated Sparrow (Zonotrichia albicollis) Is a Complex Rearrangement and Suppressor of Recombination

The Chromosomal Polymorphism Linked to Variation in Social Behavior in the White-Throated Sparrow (Zonotrichia albicollis) Is a Complex Rearrangement and Suppressor of Recombination

The value of avian genomics to the conservation of wildlife

Chromosomal polymorphism and comparative chromosome painting in the rufous-collared sparrow (Zonotrichia capensis)

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