MEIOTIC EVIDENCE FOR PERICENTRIC INVERSION POLYMORPHISM IN JUNCO (AVES)

1976 ◽  
Vol 18 (4) ◽  
pp. 747-751 ◽  
Author(s):  
Gerald F. Shields
Keyword(s):  
Adult Male ◽  
Pericentric Inversion ◽  
Inversion Polymorphism ◽  
Junco Hyemalis ◽  
Pericentric Inversions

Species of the genus Junto are polymorphic for chromosomes 2 and 5. Diplotene karyotypes of 61 adult male Dark-eyed Juncos, Junco hyemalis, were analyzed in order to determine the basis of the polymorphisms. Individuals carrying heterozygous bivalents of the polymorphic chromosomes have fewer chiasma than homozygous individuals. These data suggest that two separate pericentric inversions are at the basis of the polymorphisms.

Chromosomal evolution in finches and their allies (families: Ploceidae, Fringillidae, and Emberizidae)

1986 ◽  
Vol 28 (5) ◽  
pp. 762-769 ◽  
Author(s):  
L. Christidis
Keyword(s):  
Chromosome Banding ◽  
Chromosomal Evolution ◽  
Inversion Polymorphism ◽  
Chromosome Change ◽  
C Banding ◽  
Pericentric Inversions

Five species of sparrows, weavers, and finches belonging to the Ploceidae, Fringillidae, and Emberizidae were examined cytogenetically by G- and C-banding. There was significant G-band homology between the families, with pericentric inversions being the principal form of chromosome change both at the intra- and inter-specific levels. In some instances there was more homology between species from different families than there was between species within a family. Possible explanations for this phenomenon are discussed.Key words: chromosome banding, inversion polymorphism, Passeriformes, Aves.

scholarly journals Pericentric Inversion in Chromosome 10 in a Girl, Inherited from a Phenotypically Normal Mother: Case Report and Literature Review

2017 ◽  
Vol 1 (1) ◽  
pp. 5-11
Author(s):  
Maryam Sotoudeh Anvari ◽  
Behrang Taghvaei ◽  
Mohammad Vasei
Keyword(s):  
Case Report ◽  
Literature Review ◽  
Pericentric Inversion ◽  
Review Of The Literature ◽  
Recombinant Chromosome ◽  
Chromosome 10 ◽  
Pericentric Inversions

Pericentric inversions in chromosome 10 are regarded as both common and rare conditions, based on breakage and rearrangement within each specific segment. We present phenotypic and cytogenetic characterizations of a rare recombinant chromosome 10, namely inv(10)(p11q26), in a 13-month-old flabby girl associated with a maternal pericentric inversion. A review of the literature on the different aspects of this condition is also provided.

HOMOZYGOUS PERICENTRIC INVERSIONS AND OTHER STUDIES OF INVERSIONS ON CHROMOSOME 3 IN THE MOSQUITO ANOPHELES ALBIMANUS

1981 ◽  
Vol 23 (1) ◽  
pp. 57-64 ◽  
Author(s):  
S. G. Suguna ◽  
J. A. Seawright ◽  
D. J. Joslyn ◽  
M. G. Rabbani
Keyword(s):  
Genetic Control ◽  
Pericentric Inversion ◽  
Chromosome 3 ◽  
Double Heterozygote ◽  
Anopheles Albimanus ◽  
Control Schemes ◽  
Pericentric Inversions ◽  
Partial Sterility ◽  
Radiation Induced ◽  
Experimental Crosses

Two radiation-induced pericentric inversions on chromosome 3 in Anopheles albimanus Wiedemann have been established in homozygous stocks. In(3)17 and In(3)22 cover about 82% and 42%, respectively, of chromosome 3 and should be very useful as crossover suppressors in genetic crosses. In addition, three double-heterozygote stocks were established by combining inversions that had similar breakpoints but were viable only as heterozygotes. These balanced-lethal double heterozygotes can serve as a source of inversion gametes for use in experimental crosses and can be used in surveying populations for lethal chromosomes. Assays of the partial sterility inherent in males heterozygous for a pericentric inversion and a male-linked translocation indicated that the combination of inversions and translocations could be used in genetic control schemes.

Chromosomal Evolution in the Diplodactylinae (Gekkonidae, Reptilia) .1. Evolutionary Relationships and Patterns of Change

1987 ◽  
Vol 35 (5) ◽  
pp. 507 ◽  
Author(s):  
M King
Keyword(s):  
Pericentric Inversion ◽  
Chromosomal Rearrangements ◽  
Chromosomal Evolution ◽  
Species Group ◽  
Individual Species ◽  
Ancestral Karyotype ◽  
Chromosome Fusion ◽  
Gross Chromosomal Rearrangements ◽  
Extant Species ◽  
Pericentric Inversions

A chromosomal analysis of 47 species of diplodactyline gekkos indicates that these are a monophyletic assemblage derived from a 2n = 38 acrocentric ancestral karyotype. Four major clades are present, the first possessing the ancestral karyotype. The remainder are defined by the possession of a series of shared derived chromosomal rearrangements, or by the type of chromosome change. The first of these derived clades includes the subgenus Strophurus, which has five fixed, presumed pericentric inversion differences. The second includes members of the D. vittatus species group. Here, a number of chromosome fusions have been established which appear to have been associated with speciation. The third derived clade is distinguished by 19 fixed, presumed pericentric inversions, and includes the genera, Oedura, Rhacodactylus, Bavayia, Pseudothecadactylus, Carphodactylus and Hoplodactylus. It is argued that the 2n=38 acrocentric karyotype common to many of the species is the ancestral karyomorph, and the modifications of this format have been achieved by both chromosome fusion and pericentric inversion. The decision that this is the ancestral karyomorph was based on its dominance in extant species; the fact that similar karyotypes are present in other gekkonid subfamilies (effective out-groups), that 2n =38 all acrocentric ancestral karyotypes are also found in some other lizard families, and that such a diversity of rearrangements was established, provide arguments against any other viable ancestral format. Two discrete modes of chromosomal repatterning are found in the Diplodactylinae: the fixation of presumptive multiple pericentric inversions, producing a karyomorph which characterises large groups of species; and the fixation of fusion or presumptive inversion differences which distinguish individual species or chromosome races. The latter appear to have been associated with speciation. It is clear that in certain groups, such as the Strophurus species group (the members of which all share a derived karyomorph defined by the presence of five inverted chromosomes), speciation has proceeded without gross chromosomal rearrangements.

CHROMOSOMAL POLYMORPHISM IN CARDINALS CARDINALIS CARDINALIS

1979 ◽  
Vol 21 (4) ◽  
pp. 549-553 ◽  
Author(s):  
Rebecca A. Bass
Keyword(s):  
Pericentric Inversion ◽  
Diploid Number ◽  
Chromosomal Polymorphism ◽  
Junco Hyemalis ◽  
Zonotrichia Albicollis ◽  
Cardinalis Cardinalis

Karyotypic analyses of Cardinalis cardinalis (Linnaeus) (Passeriformes: Fringillidae) reveal a diploid number of approximately 84. Three different karyotypes were observed resulting from polymorphism of one macrochromosome pair. It is suggested that the observed polymorphism resulted from a single pericentric inversion. Similarities between karyotypes of this species and those of Zonotrichia albicollis and Junco hyemalis are discussed.

scholarly journals The role of cytogenetic variation in Akodon cursor species complex speciation (Rodentia: Sigmodontinae)

Heringeriana ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 1-12
Author(s):  
Julio Fernando Vilela ◽  
Paulo Sérgio D'Andrea ◽  
Cibele Rodrigues Bonvicino
Keyword(s):  
Pericentric Inversion ◽  
Species Complex ◽  
Rio Grande ◽  
Chromosome Polymorphism ◽  
Molecular Analyses ◽  
Supernumerary Chromosomes ◽  
Pericentric Inversions ◽  
Hardy Weinberg Equilibrium ◽  
High Genetic Distance

Chromosome polymorphism in populations of Akodon cursor complex (124 specimens) and the karyotypes of other Akodon species (92 specimens) from Brazil were analyzed. Five species were analyzed: Akodon cursor with 2n = 14, and Akodon aff. cursor with 2n = 16, Akodon montensis with 2n = 24, Akodon paranaensis with 2n = 44 and Akodon serrensis with 2n = 46. Chromosome polymorphism was observed in A. cursor and A. aff. cursor showing pericentric inversions, and also in A. paranaensis and A. montensis presenting supernumerary chromosomes. Pericentric inversion polymorphism affecting two autosomes pairs in A. cursor karyotype was found in Hardy-Weinberg equilibrium. Akodon with 2n = 16 occurred from Bahia to Rio Grande do Norte states and A. cursor with 2n = 14 from Bahia to Paraná states. Molecular analyses showed high genetic distance estimates between such set of samples, suggesting that karyomorphic type 2n = 16 is fixed in the northern part of the distribution of Akodon cursor complex. Captive hybrids males between Akodon [2n = 14] x [2n = 16] are apparently sterile, suggesting these populations may represent two full species.

Central prolactin binding site densities change seasonally in an adult male passerine bird (Junco hyemalis)

2020 ◽  
Vol 106 ◽  
pp. 101786
Author(s):  
Kristina O. Smiley ◽  
John D. Buntin ◽  
Cynthia Corbitt ◽  
Pierre Deviche
Keyword(s):  
Binding Site ◽  
Adult Male ◽  
Passerine Bird ◽  
Junco Hyemalis
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