Chromosomal polymorphism in isolated populations of Elymus (Agropyron) in the Aegean:
Identifieur interne : 000546 ( Main/Exploration ); précédent : 000545; suivant : 000547Chromosomal polymorphism in isolated populations of Elymus (Agropyron) in the Aegean:
Auteurs : Waheeb K. Heneen [Suède]Source :
- Hereditas [ 0018-0661 ] ; 1977-10.
Descripteurs français
- Wicri :
- topic : Satellite.
English descriptors
- KwdEn :
- Additional material, Agropyron, Chromosomal, Chromosomal polymorphism, Chromosome, Chromosome morphology, Chromosome type, Chromosome types, Cici, Different types, Elymus, Elymus rechingeri, Faint constriction, Genetical differences, Good pollen, Heneen, Heneen runemark, Hereditas, Interpopulation, Intrapopulation, Karyotype, Metaphase, Metaphase chromosomes, Natural populations, Offspring plants, Other types, Polymorphism, Progeny plants, Rechingeri, Runemark, Satellite, Satellite chromosome constitutions, Satellite chromosome type, Satellite chromosome types, Satellite chromosomes, Secondary constriction, Selfing, Separation difficulties, Small populations, Variant types.
- Teeft :
- Additional material, Agropyron, Chromosomal, Chromosomal polymorphism, Chromosome, Chromosome morphology, Chromosome type, Chromosome types, Cici, Different types, Elymus, Elymus rechingeri, Faint constriction, Genetical differences, Good pollen, Heneen, Heneen runemark, Hereditas, Interpopulation, Intrapopulation, Karyotype, Metaphase, Metaphase chromosomes, Natural populations, Offspring plants, Other types, Polymorphism, Progeny plants, Rechingeri, Runemark, Satellite, Satellite chromosome constitutions, Satellite chromosome type, Satellite chromosome types, Satellite chromosomes, Secondary constriction, Selfing, Separation difficulties, Small populations, Variant types.
Abstract
Elymus rechingeri is a tetraploid (2n = 28) cross‐fertilizer which grows in small isolated populations mainly on the Aegean islands. Chromosome morphology was studied in plants raised from seeds collected in nature and in plants resulting from inter‐ and intrapopulation crosses as well as selfing. Chromosomal polymorphism predominated in the material originating from nature and was observed both between and within populations. This polymorphism was expressed in the variable appearance of the three pairs of satellite chromosomes. The most common constitution of satellite chromosomes was found in Aegean and Egyptian materials and was considered to be the constitution characteristic of the species. Expected combinations of different types of satellite chromosomes were found in the offspring after inter‐ and intrapopulation crosses and after selfing. Some offspring plants also showed structural and numerical chromosome deviations. Fertility was lower in crosses between than within populations indicating genetical differences between populations. The karyotype of E. rechingeri shows great similarities to the karyotypes of E. furctus ssp. boreo‐atlanticus (2n = 28) and E. striatulus (2n = 14). The genome formula J1J1J3J3 was suggested for E. rechingeri. Meiosis was generally normal but asynapsis and multivalent formation at metaphase I and separation difficulties at anaphase I were also encountered.
Url:
DOI: 10.1111/j.1601-5223.1977.tb01231.x
Affiliations:
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Le document en format XML
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Heneen</name><affiliation wicri:level="1"><country xml:lang="fr">Suède</country><wicri:regionArea>Institute of Genetics, University of Lund</wicri:regionArea><wicri:noRegion>University of Lund</wicri:noRegion></affiliation><affiliation wicri:level="1"><country xml:lang="fr">Suède</country><wicri:regionArea>*Institute of Genetics, University of Lund, S‐223 62 Lund</wicri:regionArea><wicri:noRegion>S‐223 62 Lund</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Hereditas</title><title level="j" type="alt">HEREDITAS</title><idno type="ISSN">0018-0661</idno><idno type="eISSN">1601-5223</idno><imprint><biblScope unit="vol">86</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="211">211</biblScope><biblScope unit="page" to="224">224</biblScope><biblScope unit="page-count">14</biblScope><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="1977-10">1977-10</date></imprint><idno type="ISSN">0018-0661</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0018-0661</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Additional material</term><term>Agropyron</term><term>Chromosomal</term><term>Chromosomal polymorphism</term><term>Chromosome</term><term>Chromosome morphology</term><term>Chromosome type</term><term>Chromosome types</term><term>Cici</term><term>Different types</term><term>Elymus</term><term>Elymus rechingeri</term><term>Faint constriction</term><term>Genetical differences</term><term>Good pollen</term><term>Heneen</term><term>Heneen runemark</term><term>Hereditas</term><term>Interpopulation</term><term>Intrapopulation</term><term>Karyotype</term><term>Metaphase</term><term>Metaphase chromosomes</term><term>Natural populations</term><term>Offspring plants</term><term>Other types</term><term>Polymorphism</term><term>Progeny plants</term><term>Rechingeri</term><term>Runemark</term><term>Satellite</term><term>Satellite chromosome constitutions</term><term>Satellite chromosome type</term><term>Satellite chromosome types</term><term>Satellite chromosomes</term><term>Secondary constriction</term><term>Selfing</term><term>Separation difficulties</term><term>Small populations</term><term>Variant types</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Additional material</term><term>Agropyron</term><term>Chromosomal</term><term>Chromosomal polymorphism</term><term>Chromosome</term><term>Chromosome morphology</term><term>Chromosome type</term><term>Chromosome types</term><term>Cici</term><term>Different types</term><term>Elymus</term><term>Elymus rechingeri</term><term>Faint constriction</term><term>Genetical differences</term><term>Good pollen</term><term>Heneen</term><term>Heneen runemark</term><term>Hereditas</term><term>Interpopulation</term><term>Intrapopulation</term><term>Karyotype</term><term>Metaphase</term><term>Metaphase chromosomes</term><term>Natural populations</term><term>Offspring plants</term><term>Other types</term><term>Polymorphism</term><term>Progeny plants</term><term>Rechingeri</term><term>Runemark</term><term>Satellite</term><term>Satellite chromosome constitutions</term><term>Satellite chromosome type</term><term>Satellite chromosome types</term><term>Satellite chromosomes</term><term>Secondary constriction</term><term>Selfing</term><term>Separation difficulties</term><term>Small populations</term><term>Variant types</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Satellite</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Elymus rechingeri is a tetraploid (2n = 28) cross‐fertilizer which grows in small isolated populations mainly on the Aegean islands. Chromosome morphology was studied in plants raised from seeds collected in nature and in plants resulting from inter‐ and intrapopulation crosses as well as selfing. Chromosomal polymorphism predominated in the material originating from nature and was observed both between and within populations. This polymorphism was expressed in the variable appearance of the three pairs of satellite chromosomes. The most common constitution of satellite chromosomes was found in Aegean and Egyptian materials and was considered to be the constitution characteristic of the species. Expected combinations of different types of satellite chromosomes were found in the offspring after inter‐ and intrapopulation crosses and after selfing. Some offspring plants also showed structural and numerical chromosome deviations. Fertility was lower in crosses between than within populations indicating genetical differences between populations. The karyotype of E. rechingeri shows great similarities to the karyotypes of E. furctus ssp. boreo‐atlanticus (2n = 28) and E. striatulus (2n = 14). The genome formula J1J1J3J3 was suggested for E. rechingeri. Meiosis was generally normal but asynapsis and multivalent formation at metaphase I and separation difficulties at anaphase I were also encountered.</div></front></TEI><affiliations><list><country><li>Suède</li></country></list><tree><country name="Suède"><noRegion><name sortKey="Heneen, Waheeb K" sort="Heneen, Waheeb K" uniqKey="Heneen W" first="Waheeb K." last="Heneen">Waheeb K. Heneen</name></noRegion><name sortKey="Heneen, Waheeb K" sort="Heneen, Waheeb K" uniqKey="Heneen W" first="Waheeb K." last="Heneen">Waheeb K. Heneen</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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