A De Novo Case of Floating Chromosomal Polymorphisms by Translocation in Quasipaa boulengeri (Anura, Dicroglossidae)
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{"title"=>"A De Novo Case of Floating Chromosomal Polymorphisms by Translocation in Quasipaa boulengeri (Anura, Dicroglossidae)", "type"=>"journal", "authors"=>[{"first_name"=>"Liyan", "last_name"=>"Qing", "scopus_author_id"=>"24339110600"}, {"first_name"=>"Yun", "last_name"=>"Xia", "scopus_author_id"=>"40361739000"}, {"first_name"=>"Yuchi", "last_name"=>"Zheng", "scopus_author_id"=>"55498102500"}, {"first_name"=>"Xiaomao", "last_name"=>"Zeng", "scopus_author_id"=>"7403248218"}], "year"=>2012, "source"=>"PLoS ONE", "identifiers"=>{"sgr"=>"84867093408", "pui"=>"365779663", "isbn"=>"1932-6203", "doi"=>"10.1371/journal.pone.0046163", "issn"=>"19326203", "scopus"=>"2-s2.0-84867093408"}, "id"=>"0b6b6651-1b1c-3d94-8fc7-968c02701ae6", "abstract"=>"Very few natural polymorphisms involving interchromosomal reciprocal translocations are known in amphibians even in vertebrates. In this study, thirty three populations, including 471 individuals of the spiny frog Quasipaa boulengeri, were karyotypically examined using Giemsa stain or FISH. Five different karyomorphs were observed. The observed heteromorphism was autosomal but not sex-related, as the same heteromorphic chromosomes were found both in males and females. Our results indicated that the variant karyotypes resulted from a mutual interchange occurring between chromosomes 1 and 6. The occurrence of a nearly whole-arm translocation between chromosome no. 1 and no. 6 gave rise to a high frequency of alternate segregation and probably resulted in the maintenance of the translocation polymorphisms in a few populations. The translocation polymorphism is explained by different frequencies of segregation modes of the translocation heterozygote during meiosis. Theoretically, nine karyomorphs should be investigated, however, four expected karyotypes were not found. The absent karyomorphs may result from recessive lethal mutations, position effects, duplications and deficiencies. The phylogenetic inference proved that all populations of Q. boulengeri grouped into a monophyletic clade. The mutual translocation likely evolved just once in this species and the dispersal of the one karyomorph (type IV) can explain the chromosomal variations among populations. © 2012 Qing et al.", "link"=>"http://www.mendeley.com/research/novo-case-floating-chromosomal-polymorphisms-translocation-quasipaa-boulengeri-anura-dicroglossidae", "reader_count"=>8, "reader_count_by_academic_status"=>{"Researcher"=>1, "Student > Ph. D. Student"=>3, "Student > Postgraduate"=>2, "Professor"=>2}, "reader_count_by_user_role"=>{"Researcher"=>1, "Student > Ph. D. Student"=>3, "Student > Postgraduate"=>2, "Professor"=>2}, "reader_count_by_subject_area"=>{"Biochemistry, Genetics and Molecular Biology"=>4, "Agricultural and Biological Sciences"=>4}, "reader_count_by_subdiscipline"=>{"Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>4}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>4}}, "reader_count_by_country"=>{"France"=>1}, "group_count"=>0}

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/564059"], "description"=>"<p>The site names designated as in <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0046163#pone-0046163-t001\" target=\"_blank\">Table 1</a>.</p>", "links"=>[], "tags"=>["sites", "sichuan"], "article_id"=>234552, "categories"=>["Biological Sciences", "Cell Biology", "Genetics", "Evolutionary Biology"], "users"=>["Liyan Qing", "Yun Xia", "Yuchi Zheng", "Xiaomao Zeng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0046163.g001", "stats"=>{"downloads"=>0, "page_views"=>7, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Map_showing_the_sites_of_this_and_previous_study_around_Sichuan_Basin_China_/234552", "title"=>"Map showing the sites of this and previous study around Sichuan Basin, China.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-10-03 01:15:52"}
  • {"files"=>["https://ndownloader.figshare.com/files/564264"], "description"=>"<p>Left row: mitotic metaphase; middle row: karyotypes; right row: idiograms of no.1 and no. 6. (a) Karyoype I obtained homomorphic biarmed chromosomes no. 1 (M/M) and no. 6 (m/m), the metaphase spread was taken from one male of Mt. Omei population; (b) Karyoype II had homomorphic biarmed chromosomes no. 1 (M/M), heteromorphic biarmed chromosomes no. 6 (m/St), the metaphase spread was taken from one female of Pinglezhen population; (c) Karyoype III was found to possess heteromorphic biarmed chromosomes no. 1 (M/T), homomorphic biarmed chromosomes no. 6 (m/m), the metaphase spread was taken from one female of Jinxingxiang-2 population; (d) Karyoype IV had heteromorphic biarmed chromosomes no. 1 (M/T), no. 6 (m/St), the metaphase spread was taken from one male of Gaotangsi population; (e) Karyoype V was characterised with heteromorphic chromosomes no. 1 (M/T), homomorphic biarmed chromosomes no. 6 (St/St), the metaphase spread was from one female of Mt. Tiantai-1 population. Long arrows indicated chromosomes no. 1; short arrows indicated chromosomes no. 6. Scale bar = 10 μm.</p>", "links"=>[], "tags"=>["metaphase"], "article_id"=>234768, "categories"=>["Biological Sciences", "Cell Biology", "Genetics", "Evolutionary Biology"], "users"=>["Liyan Qing", "Yun Xia", "Yuchi Zheng", "Xiaomao Zeng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0046163.g003", "stats"=>{"downloads"=>0, "page_views"=>6, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Mitotic_metaphase_and_five_different_karyomorphs_/234768", "title"=>"Mitotic metaphase and five different karyomorphs.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-10-03 01:19:28"}
  • {"files"=>["https://ndownloader.figshare.com/files/564928"], "description"=>"<p>Roman numerals (I∼V) represent five karyomorph types.</p><p>The bold mumbers and letters indicate the homologues of no. 1 and no. 6 and their cenromere position, respectively.</p><p>M =  large metacentric chromosome; m =  small metacentric chromosome; Sm =  large submetacentric chromosome;</p><p>sm =  small submetacentric chromosome; St =  large subtelocentric chromosome; T =  large telocentric chromosome.</p><p>Variations exist in the types of chromosome no. 1 and no. 6.</p>", "links"=>[], "tags"=>["genetics and genomics", "Computational biology", "cell biology", "Evolutionary biology"], "article_id"=>235422, "categories"=>["Biological Sciences", "Cell Biology", "Genetics", "Evolutionary Biology"], "users"=>["Liyan Qing", "Yun Xia", "Yuchi Zheng", "Xiaomao Zeng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0046163.t002", "stats"=>{"downloads"=>2, "page_views"=>1, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Constitution_of_the_five_karyomorphs_/235422", "title"=>"Constitution of the five karyomorphs.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2012-10-03 01:30:22"}
  • {"files"=>["https://ndownloader.figshare.com/files/564993"], "description"=>"<p>Roman numerals represent different karyomorphs with chromosome no.1/no.6: I, MM/mm; II, MM/mSt; III, MT/mm; IV, MT/mSt; V, MT/StSt (M =  large metacentric chromosome; m =  small metacentric chromosome; St =  large subtelocentric chromosome; T =  large telocentric chromosome).</p><p>“*” Populations with heteromorphic chromosomes in both males and females.</p><p>“#” Specimens from Mt. Qingchengshan reported by Wang (2006) are actually from Xuankouzhen (personal communication).</p><p>“?” The numbers of experimental animal are not shown in the references. Numbers in parentheses stand for the collecting localities.</p>", "links"=>[], "tags"=>["karyomorph"], "article_id"=>235491, "categories"=>["Biological Sciences", "Cell Biology", "Genetics", "Evolutionary Biology"], "users"=>["Liyan Qing", "Yun Xia", "Yuchi Zheng", "Xiaomao Zeng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0046163.t001", "stats"=>{"downloads"=>3, "page_views"=>1, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Synopsis_of_the_karyomorph_types_/235491", "title"=>"Synopsis of the karyomorph types.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2012-10-03 01:31:31"}
  • {"files"=>["https://ndownloader.figshare.com/files/565066"], "description"=>"<p>RL: relative length (one chromosome length/total chromosome length); AR: arm radio (long arm length/short arm length); C: Cenromere position;.</p><p>M =  large metacentric chromosome; m =  small metacentric chromosome; Sm =  large submetacentric chromosome; sm =  small submetacentric chromosome; St =  large subtelocentric chromosome; T =  large telocentric chromosome.1−1, 1−2: Two homologues of chromosome no. 1; 6−1, 6−2: Two homologues of chromosome no. 6.</p>", "links"=>[], "tags"=>["karyotype"], "article_id"=>235561, "categories"=>["Biological Sciences", "Cell Biology", "Genetics", "Evolutionary Biology"], "users"=>["Liyan Qing", "Yun Xia", "Yuchi Zheng", "Xiaomao Zeng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0046163.t005", "stats"=>{"downloads"=>4, "page_views"=>14, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Quantitative_data_on_the_karyotype_I_and_IV_/235561", "title"=>"Quantitative data on the karyotype I and IV.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2012-10-03 01:32:41"}
  • {"files"=>["https://ndownloader.figshare.com/files/564811"], "description"=>"<p>Diagrammatic representation of a reciprocal translocation occurring between one member of the chromosome pair 1 (AB) and pair 6 (CD) giving rise to two new chromosomes (BD and AC).</p>", "links"=>[], "tags"=>["reciprocal", "translocation", "occurring", "chromosome", "giving", "chromosomes"], "article_id"=>235303, "categories"=>["Biological Sciences", "Cell Biology", "Genetics", "Evolutionary Biology"], "users"=>["Liyan Qing", "Yun Xia", "Yuchi Zheng", "Xiaomao Zeng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0046163.g009", "stats"=>{"downloads"=>1, "page_views"=>12, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Diagrammatic_representation_of_a_reciprocal_translocation_occurring_between_one_member_of_the_chromosome_pair_1_AB_and_pair_6_CD_giving_rise_to_two_new_chromosomes_BD_and_AC_/235303", "title"=>"Diagrammatic representation of a reciprocal translocation occurring between one member of the chromosome pair 1 (AB) and pair 6 (CD) giving rise to two new chromosomes (BD and AC).", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-10-03 01:28:23"}
  • {"files"=>["https://ndownloader.figshare.com/files/565031"], "description"=>"<p>The ten cells are respectively from ten individuals (5♀, 5♂) with karyotype IV from different populations. The T test is made between the sum of the length of the four heteromorphic chromosomes from chromosome no. 1 and no. 6 designed as (1−1)+(1−2)+(1−1)+(1−2) and the sum of the length of the two normal homologues designed as [(1−1)+(6−1)]×2, p>0.05. “1−1” and “1−2” refer to the length of two homologues of chromosome no. 1, respectively. “6−1” and “6−2” represent the length of two homologues of chromosome no.6, respectively.</p>", "links"=>[], "tags"=>["lengths", "hetermorphic", "chromosomes"], "article_id"=>235526, "categories"=>["Biological Sciences", "Cell Biology", "Genetics", "Evolutionary Biology"], "users"=>["Liyan Qing", "Yun Xia", "Yuchi Zheng", "Xiaomao Zeng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0046163.t004", "stats"=>{"downloads"=>3, "page_views"=>8, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_The_lengths_of_four_hetermorphic_chromosomes_in_ten_cells_956_m_/235526", "title"=>"The lengths of four hetermorphic chromosomes in ten cells(μm).", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2012-10-03 01:32:06"}
  • {"files"=>["https://ndownloader.figshare.com/files/564963"], "description"=>"<p>Locality names and numbers are consisted with those in <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0046163#pone-0046163-t001\" target=\"_blank\">Table 1</a>;</p><p>Roman numerals (I∼IX) represent different karyotypes;</p><p>“*” Populations with more than 50% type IV.</p>", "links"=>[], "tags"=>["frequencies", "pooled"], "article_id"=>235459, "categories"=>["Biological Sciences", "Cell Biology", "Genetics", "Evolutionary Biology"], "users"=>["Liyan Qing", "Yun Xia", "Yuchi Zheng", "Xiaomao Zeng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0046163.t003", "stats"=>{"downloads"=>2, "page_views"=>1, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Karyotype_frequencies_in_each_and_pooled_populations_/235459", "title"=>"Karyotype frequencies in each and pooled populations.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2012-10-03 01:30:59"}
  • {"files"=>["https://ndownloader.figshare.com/files/564372"], "description"=>"<p>(a) Karyoype I, 5S rDNA sites were located on homomorphic no. 1 (M/M) chromosomes, the metaphase spread was taken from one male of Mt. Tiantai-1 population; (b) Karyoype II, 5S rDNA signals were found on homomorphic no. 1 (M/M) chromosomes, the metaphase spread was taken from one female of Mt. Tiantai-1 population; (c) Karyoype III, 5S rDNA loci were observed on heteromorphic chromosome no. 1 (M/T), the metaphase spread was taken from one female of Hongkouxiang population; (d) Karyoype IV, karyotype, 5S rDNA distributed on heteromorphic chromosomeno. 1 (M/T), the metaphase spread was taken from one male of Xilingzhen population; (e) Karyoype V, karyotype, 5S rDNA signals were investigated on heteromorphic chromosome no. 1 (M/T), the metaphase spread was taken from one female of Mt. Tiantai-1 population. Arrow heads indicated the 5S rDNA signals. Scale bar  = 5 μm.</p>", "links"=>[], "tags"=>["situ", "hybridization", "5s", "rdna", "mitotic", "metaphase"], "article_id"=>234863, "categories"=>["Biological Sciences", "Cell Biology", "Genetics", "Evolutionary Biology"], "users"=>["Liyan Qing", "Yun Xia", "Yuchi Zheng", "Xiaomao Zeng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0046163.g004", "stats"=>{"downloads"=>1, "page_views"=>9, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_In_situ_hybridization_of_5S_rDNA_to_mitotic_metaphase_chromosomes_/234863", "title"=>"In situ hybridization of 5S rDNA to mitotic metaphase chromosomes.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-10-03 01:21:03"}
  • {"files"=>["https://ndownloader.figshare.com/files/564752"], "description"=>"<p>A. “recessive lethal mutation” mechanism. If one gene “a” locates at the translocation breakpoint (arrow indicated) and when the translocation occurs, “a” mutates to a recessive lethal gene “a' ”, and the progenies with genotype “a'a' ” will die while with “aa' ” will be viable. B. “position effect” mechanism. The breakpoint locates between two genes “a” and “b” on chromosome 1. When the translocation occurs, “b” will translocate to chromosome 6 and the relative position of “a” and “b” will be changed, then neither “a” nor “b” can function effectively and give rise to the death of progenies with either separated gene “a” or “b”. Once a progeny obtain a chromosome with normal gene order of “a” and “b”, it will be viable.</p>", "links"=>[], "tags"=>["illustrates", "mechanisms", "parts", "absent"], "article_id"=>235248, "categories"=>["Biological Sciences", "Cell Biology", "Genetics", "Evolutionary Biology"], "users"=>["Liyan Qing", "Yun Xia", "Yuchi Zheng", "Xiaomao Zeng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0046163.g008", "stats"=>{"downloads"=>1, "page_views"=>5, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Diagram_illustrates_the_possible_mechanisms_for_parts_of_the_absent_karyomorphs_/235248", "title"=>"Diagram illustrates the possible mechanisms for parts of the absent karyomorphs.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-10-03 01:27:28"}
  • {"files"=>["https://ndownloader.figshare.com/files/231052", "https://ndownloader.figshare.com/files/564543"], "description"=>"<p>Alternate segregation results in production of normal or balanced chromosomes. The separation of homologous centromeres (adjacent-1) or nonhomologous centromeres (adjacent-2) results in production of gametes with unbalanced chromosome. Horizontal lines represent the breakpoints.</p>", "links"=>[], "tags"=>["segregation", "reciprocal", "translocation", "involving", "chromosome"], "article_id"=>235037, "categories"=>["Biological Sciences", "Cell Biology", "Genetics", "Evolutionary Biology"], "users"=>["Liyan Qing", "Yun Xia", "Yuchi Zheng", "Xiaomao Zeng"], "doi"=>"https://dx.doi.org/235037", "stats"=>{"downloads"=>0, "page_views"=>1, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Hypothetical_segregation_of_reciprocal_translocation_involving_chromosome_1_and_6_during_meiosis_/235037", "title"=>"Hypothetical segregation of reciprocal translocation involving chromosome 1 and 6 during meiosis.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-10-03 01:23:57"}
  • {"files"=>["https://ndownloader.figshare.com/files/564664"], "description"=>"<p>Progenies with karyotypes in the grey box are absent (type VI, VII, VIII, IX) while those in white box are viable (type I, II, III, IV, V). For both gametes and progenies, only no. 1 and no. 6 chromosomes are given.</p>", "links"=>[], "tags"=>["karyomorphs", "resulting", "gametes", "produced", "alternate", "adjacent-1"], "article_id"=>235150, "categories"=>["Biological Sciences", "Cell Biology", "Genetics", "Evolutionary Biology"], "users"=>["Liyan Qing", "Yun Xia", "Yuchi Zheng", "Xiaomao Zeng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0046163.g007", "stats"=>{"downloads"=>0, "page_views"=>1, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Diagrammatic_representation_of_the_nine_expected_karyomorphs_resulting_from_the_combination_of_four_gametes_produced_by_alternate_and_adjacent_1_segregations_/235150", "title"=>"Diagrammatic representation of the nine expected karyomorphs resulting from the combination of four gametes produced by alternate and adjacent-1 segregations.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-10-03 01:25:50"}
  • {"files"=>["https://ndownloader.figshare.com/files/564191"], "description"=>"<p>Karyomorph type I, II, III, IV and V are present while type VI, VII, VIII and IX are absent in the investigated populations. All of the idiograms are based on the quantitative data of <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0046163#pone-0046163-t005\" target=\"_blank\">Table 5</a>. Abbreviations designated as in <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0046163#pone-0046163-t001\" target=\"_blank\">Tables 1</a>, <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0046163#pone-0046163-t005\" target=\"_blank\">5</a>. Black dots on the chromosomes show the 5S rDNA locations.</p>", "links"=>[], "tags"=>["karyomorphs", "morphological", "variations"], "article_id"=>234683, "categories"=>["Biological Sciences", "Cell Biology", "Genetics", "Evolutionary Biology"], "users"=>["Liyan Qing", "Yun Xia", "Yuchi Zheng", "Xiaomao Zeng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0046163.g002", "stats"=>{"downloads"=>0, "page_views"=>6, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Idiograms_of_nine_expected_karyomorphs_show_morphological_variations_in_no_1_and_no_6_/234683", "title"=>"Idiograms of nine expected karyomorphs show morphological variations in no.1 and no. 6.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-10-03 01:18:03"}
  • {"files"=>["https://ndownloader.figshare.com/files/564480"], "description"=>"<p>Numbers beside nodes are ML bootstrap proportions ≥70 (above branches) and Bayesian posterior probabilities ≥90 (under branches). All rRNA+COI haplotypes contained the 12S and 16S sequences, and all COI+rRNA haplotypes contained the COI sequence. Triangles indicate nodes that are not supported in the Bayesian analysis. Asterisk represents <i>Q. robertingeri</i> which is thought to be the synonym of <i>Q. boulengeri</i> (Che et al., 2009).</p>", "links"=>[], "tags"=>["trees", "inferred", "ml", "analyses", "three-partition", "mitochondrial"], "article_id"=>234972, "categories"=>["Biological Sciences", "Cell Biology", "Genetics", "Evolutionary Biology"], "users"=>["Liyan Qing", "Yun Xia", "Yuchi Zheng", "Xiaomao Zeng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0046163.g005", "stats"=>{"downloads"=>0, "page_views"=>2, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Phylogenetic_trees_of_Q_boulengeri_inferred_from_ML_analyses_of_the_three_partition_mitochondrial_rRNA_COI_data_set_A_or_COI_rRNA_data_set_B_/234972", "title"=>"Phylogenetic trees of <i>Q. boulengeri</i> inferred from ML analyses of the three-partition mitochondrial rRNA+COI data set (A) or COI+rRNA data set (B).", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-10-03 01:22:52"}
  • {"files"=>["https://ndownloader.figshare.com/files/564854"], "description"=>"<p>It can give rise to type I, II, III, and IV in F1. Only five karyotypes (I, II, III, IV and V) can be observed after F2, because the other four types (VI, VII, VIII and IX) are pridicted to die.</p>", "links"=>[], "tags"=>["dispersal", "karyotype", "iv"], "article_id"=>235352, "categories"=>["Biological Sciences", "Cell Biology", "Genetics", "Evolutionary Biology"], "users"=>["Liyan Qing", "Yun Xia", "Yuchi Zheng", "Xiaomao Zeng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0046163.g010", "stats"=>{"downloads"=>0, "page_views"=>1, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Diagrammatic_representation_of_the_possible_dispersal_of_an_individual_with_karyotype_IV_to_the_normal_population_/235352", "title"=>"Diagrammatic representation of the possible dispersal of an individual with karyotype IV to the normal population.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-10-03 01:29:12"}
  • {"files"=>["https://ndownloader.figshare.com/files/300737", "https://ndownloader.figshare.com/files/300909", "https://ndownloader.figshare.com/files/300959"], "description"=>"<div><p>Very few natural polymorphisms involving interchromosomal reciprocal translocations are known in amphibians even in vertebrates. In this study, thirty three populations, including 471 individuals of the spiny frog <em>Quasipaa boulengeri</em>, were karyotypically examined using Giemsa stain or FISH. Five different karyomorphs were observed. The observed heteromorphism was autosomal but not sex-related, as the same heteromorphic chromosomes were found both in males and females. Our results indicated that the variant karyotypes resulted from a mutual interchange occurring between chromosomes 1 and 6. The occurrence of a nearly whole-arm translocation between chromosome no. 1 and no. 6 gave rise to a high frequency of alternate segregation and probably resulted in the maintenance of the translocation polymorphisms in a few populations. The translocation polymorphism is explained by different frequencies of segregation modes of the translocation heterozygote during meiosis. Theoretically, nine karyomorphs should be investigated, however, four expected karyotypes were not found. The absent karyomorphs may result from recessive lethal mutations, position effects, duplications and deficiencies. The phylogenetic inference proved that all populations of <em>Q. boulengeri</em> grouped into a monophyletic clade. The mutual translocation likely evolved just once in this species and the dispersal of the one karyomorph (type IV) can explain the chromosomal variations among populations.</p> </div>", "links"=>[], "tags"=>["de", "novo", "floating", "chromosomal", "polymorphisms", "translocation"], "article_id"=>119297, "categories"=>["Biological Sciences", "Cell Biology", "Genetics", "Evolutionary Biology"], "users"=>["Liyan Qing", "Yun Xia", "Yuchi Zheng", "Xiaomao Zeng"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0046163.s001", "https://dx.doi.org/10.1371/journal.pone.0046163.s002", "https://dx.doi.org/10.1371/journal.pone.0046163.s003"], "stats"=>{"downloads"=>17, "page_views"=>9, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/A_De_Novo_Case_of_Floating_Chromosomal_Polymorphisms_by_Translocation_in_Quasipaa_boulengeri_Anura_Dicroglossidae_/119297", "title"=>"A De Novo Case of Floating Chromosomal Polymorphisms by Translocation in <em>Quasipaa boulengeri</em> (Anura, Dicroglossidae)", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2012-10-03 02:34:57"}

PMC Usage Stats | Further Information

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Relative Metric

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