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Cytological heterozygosity and the hybrid origin of sweet orange [Citrus sinensis (L.) Osbeck]

Identifieur interne : 000990 ( PascalFrancis/Corpus ); précédent : 000989; suivant : 000991

Cytological heterozygosity and the hybrid origin of sweet orange [Citrus sinensis (L.) Osbeck]

Auteurs : A. Pedrosa ; D. Schweizer ; M. Guerra

Source :

RBID : Pascal:00-0166955

Descripteurs français

English descriptors

Abstract

Citrus sinensis chromosomes, although small in size, present a remarkable differentiation of bands with the fluorochromes CMA and DAPI. These bands suggest that some heteromorphisms are fixed in this species. To investigate the extension of these heteromorphisms, ten cultivars of C. sinenesis were analysed with CMA/DAP1 staining and, in some of them, the 18S-5.8S-25S rRNA and 5S rRNA genes were located by in situ hybridization. CMA/DAPI staining showed exactly the same CMA+/DAPI- banding pattern for all cultivars. In situ hybridization revealed three 18S-5.8S-25S rRNA gene sites, two proximally located on two similar chromosomes and one terminally located on a third non-related chromosome. Two 5S rRNA gene sites were observed in this species, with one located proximal to the telomeric 18S-5.8S-25S rDNA site. Both cytological approaches revealed an invariable, heterozygotic karyotype among sweet orange cultivars. Based on these data, the putative hybrid origin of the species is discussed.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

pA  
A01 01  1    @0 0040-5752
A02 01      @0 THAGA6
A03   1    @0 Theor. Appl. Genet.
A05       @2 100
A06       @2 3-4
A08 01  1  ENG  @1 Cytological heterozygosity and the hybrid origin of sweet orange [Citrus sinensis (L.) Osbeck]
A11 01  1    @1 PEDROSA (A.)
A11 02  1    @1 SCHWEIZER (D.)
A11 03  1    @1 GUERRA (M.)
A14 01      @1 Department of Cytology and Genetics, Institute of Botany, University of Vienna, Rennweg 14 @2 1030, Vienna @3 AUT @Z 1 aut. @Z 2 aut. @Z 3 aut.
A20       @1 361-367
A21       @1 2000
A23 01      @0 ENG
A43 01      @1 INIST @2 395 @5 354000086661830040
A44       @0 0000 @1 © 2000 INIST-CNRS. All rights reserved.
A45       @0 1 p.1/4
A47 01  1    @0 00-0166955
A60       @1 P
A61       @0 A
A64 01  1    @0 Theoretical and Applied Genetics
A66 01      @0 DEU
C01 01    ENG  @0 Citrus sinensis chromosomes, although small in size, present a remarkable differentiation of bands with the fluorochromes CMA and DAPI. These bands suggest that some heteromorphisms are fixed in this species. To investigate the extension of these heteromorphisms, ten cultivars of C. sinenesis were analysed with CMA/DAP1 staining and, in some of them, the 18S-5.8S-25S rRNA and 5S rRNA genes were located by in situ hybridization. CMA/DAPI staining showed exactly the same CMA+/DAPI- banding pattern for all cultivars. In situ hybridization revealed three 18S-5.8S-25S rRNA gene sites, two proximally located on two similar chromosomes and one terminally located on a third non-related chromosome. Two 5S rRNA gene sites were observed in this species, with one located proximal to the telomeric 18S-5.8S-25S rDNA site. Both cytological approaches revealed an invariable, heterozygotic karyotype among sweet orange cultivars. Based on these data, the putative hybrid origin of the species is discussed.
C02 01  X    @0 002A07D02B
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C03 01  X  ENG  @0 Cultivar @5 05
C03 01  X  SPA  @0 Cultivar @5 05
C03 02  X  FRE  @0 Hybridation interspécifique @5 06
C03 02  X  ENG  @0 Interspecific hybridization @5 06
C03 02  X  SPA  @0 Hibridación interespecífica @5 06
C03 03  X  FRE  @0 Cytogénétique @5 07
C03 03  X  ENG  @0 Cytogenetics @5 07
C03 03  X  SPA  @0 Citogenética @5 07
C03 04  X  FRE  @0 Bande chromosomique @5 08
C03 04  X  ENG  @0 Chromosome banding @5 08
C03 04  X  SPA  @0 Banda cromosómica @5 08
C03 05  X  FRE  @0 RNA ribosomique @5 09
C03 05  X  ENG  @0 Ribosomal RNA @5 09
C03 05  X  SPA  @0 RNA ribosómico @5 09
C03 06  X  FRE  @0 Gène @5 10
C03 06  X  ENG  @0 Gene @5 10
C03 06  X  SPA  @0 Gen @5 10
C03 07  X  FRE  @0 Citrus sinensis @2 NS @5 16
C03 07  X  ENG  @0 Citrus sinensis @2 NS @5 16
C03 07  X  SPA  @0 Citrus sinensis @2 NS @5 16
C03 08  X  FRE  @0 Agrume @5 67
C03 08  X  ENG  @0 Citrus fruit @5 67
C03 08  X  SPA  @0 Agrios @5 67
C03 09  X  FRE  @0 Bande chromosomique CMA @4 INC @5 91
C07 01  X  FRE  @0 Rutaceae @2 NS
C07 01  X  ENG  @0 Rutaceae @2 NS
C07 01  X  SPA  @0 Rutaceae @2 NS
C07 02  X  FRE  @0 Dicotyledones @2 NS
C07 02  X  ENG  @0 Dicotyledones @2 NS
C07 02  X  SPA  @0 Dicotyledones @2 NS
C07 03  X  FRE  @0 Angiospermae @2 NS
C07 03  X  ENG  @0 Angiospermae @2 NS
C07 03  X  SPA  @0 Angiospermae @2 NS
C07 04  X  FRE  @0 Spermatophyta @2 NS
C07 04  X  ENG  @0 Spermatophyta @2 NS
C07 04  X  SPA  @0 Spermatophyta @2 NS
N21       @1 122

Format Inist (serveur)

NO : PASCAL 00-0166955 INIST
ET : Cytological heterozygosity and the hybrid origin of sweet orange [Citrus sinensis (L.) Osbeck]
AU : PEDROSA (A.); SCHWEIZER (D.); GUERRA (M.)
AF : Department of Cytology and Genetics, Institute of Botany, University of Vienna, Rennweg 14/1030, Vienna/Autriche (1 aut., 2 aut., 3 aut.)
DT : Publication en série; Niveau analytique
SO : Theoretical and Applied Genetics; ISSN 0040-5752; Coden THAGA6; Allemagne; Da. 2000; Vol. 100; No. 3-4; Pp. 361-367; Bibl. 1 p.1/4
LA : Anglais
EA : Citrus sinensis chromosomes, although small in size, present a remarkable differentiation of bands with the fluorochromes CMA and DAPI. These bands suggest that some heteromorphisms are fixed in this species. To investigate the extension of these heteromorphisms, ten cultivars of C. sinenesis were analysed with CMA/DAP1 staining and, in some of them, the 18S-5.8S-25S rRNA and 5S rRNA genes were located by in situ hybridization. CMA/DAPI staining showed exactly the same CMA+/DAPI- banding pattern for all cultivars. In situ hybridization revealed three 18S-5.8S-25S rRNA gene sites, two proximally located on two similar chromosomes and one terminally located on a third non-related chromosome. Two 5S rRNA gene sites were observed in this species, with one located proximal to the telomeric 18S-5.8S-25S rDNA site. Both cytological approaches revealed an invariable, heterozygotic karyotype among sweet orange cultivars. Based on these data, the putative hybrid origin of the species is discussed.
CC : 002A07D02B
FD : Cultivar; Hybridation interspécifique; Cytogénétique; Bande chromosomique; RNA ribosomique; Gène; Citrus sinensis; Agrume; Bande chromosomique CMA
FG : Rutaceae; Dicotyledones; Angiospermae; Spermatophyta
ED : Cultivar; Interspecific hybridization; Cytogenetics; Chromosome banding; Ribosomal RNA; Gene; Citrus sinensis; Citrus fruit
EG : Rutaceae; Dicotyledones; Angiospermae; Spermatophyta
SD : Cultivar; Hibridación interespecífica; Citogenética; Banda cromosómica; RNA ribosómico; Gen; Citrus sinensis; Agrios
LO : INIST-395.354000086661830040
ID : 00-0166955

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Pascal:00-0166955

Le document en format XML

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<ET>Cytological heterozygosity and the hybrid origin of sweet orange [Citrus sinensis (L.) Osbeck]</ET>
<AU>PEDROSA (A.); SCHWEIZER (D.); GUERRA (M.)</AU>
<AF>Department of Cytology and Genetics, Institute of Botany, University of Vienna, Rennweg 14/1030, Vienna/Autriche (1 aut., 2 aut., 3 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Theoretical and Applied Genetics; ISSN 0040-5752; Coden THAGA6; Allemagne; Da. 2000; Vol. 100; No. 3-4; Pp. 361-367; Bibl. 1 p.1/4</SO>
<LA>Anglais</LA>
<EA>Citrus sinensis chromosomes, although small in size, present a remarkable differentiation of bands with the fluorochromes CMA and DAPI. These bands suggest that some heteromorphisms are fixed in this species. To investigate the extension of these heteromorphisms, ten cultivars of C. sinenesis were analysed with CMA/DAP1 staining and, in some of them, the 18S-5.8S-25S rRNA and 5S rRNA genes were located by in situ hybridization. CMA/DAPI staining showed exactly the same CMA
<sup>+</sup>
/DAPI
<sup>-</sup>
banding pattern for all cultivars. In situ hybridization revealed three 18S-5.8S-25S rRNA gene sites, two proximally located on two similar chromosomes and one terminally located on a third non-related chromosome. Two 5S rRNA gene sites were observed in this species, with one located proximal to the telomeric 18S-5.8S-25S rDNA site. Both cytological approaches revealed an invariable, heterozygotic karyotype among sweet orange cultivars. Based on these data, the putative hybrid origin of the species is discussed.</EA>
<CC>002A07D02B</CC>
<FD>Cultivar; Hybridation interspécifique; Cytogénétique; Bande chromosomique; RNA ribosomique; Gène; Citrus sinensis; Agrume; Bande chromosomique CMA</FD>
<FG>Rutaceae; Dicotyledones; Angiospermae; Spermatophyta</FG>
<ED>Cultivar; Interspecific hybridization; Cytogenetics; Chromosome banding; Ribosomal RNA; Gene; Citrus sinensis; Citrus fruit</ED>
<EG>Rutaceae; Dicotyledones; Angiospermae; Spermatophyta</EG>
<SD>Cultivar; Hibridación interespecífica; Citogenética; Banda cromosómica; RNA ribosómico; Gen; Citrus sinensis; Agrios</SD>
<LO>INIST-395.354000086661830040</LO>
<ID>00-0166955</ID>
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