Molecular genetics of growth and development in Populus. II. Segregation distortion due to genetic load.
Identifieur interne : 004B31 ( Main/Exploration ); précédent : 004B30; suivant : 004B32Molecular genetics of growth and development in Populus. II. Segregation distortion due to genetic load.
Auteurs : H D Bradshaw [États-Unis] ; R F StettlerSource :
- TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik [ 0040-5752 ] ; 1994.
Abstract
Distortion of expected Mendelian segregation ratios, commonly observed in many plant taxa, has been detected in an experimental three-generation inbred pedigree of Populus founded by interspecific hybridization between P. trichocarpa and P. deltoides. An RFLP linkage map was constructed around a single locus showing severe skewing of segregation ratio against F2 trees carrying the P. trichocarpa allele in homozygous form. Several hypotheses for the mechanism of segregation distortion at this locus were tested, including directional chromosome loss, segregation of a pollen lethal allele, conflicts between genetic factors that isolate the parental species, and inbreeding depression as a result of genetic load. Breeding experiments to produce inbred and outcrossed progenies were combined with PCR-based detection of RFLPs to follow the fate of the deficient allele throughout embryo and seedling development. A recessive lethal allele, lth, inherited from the P. trichocarpa parent, was found to be tightly linked to the RFLP marker locus POP1054 and to cause embryo and seedling mortality. Heterozygotes (lth/+) appear to be phenotypically normal as embryos, seedlings, and young trees.
DOI: 10.1007/BF00222447
PubMed: 24177929
Affiliations:
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Segregation distortion due to genetic load.</title><author><name sortKey="Bradshaw, H D" sort="Bradshaw, H D" uniqKey="Bradshaw H" first="H D" last="Bradshaw">H D Bradshaw</name><affiliation wicri:level="4"><nlm:affiliation>Department of Biochemistry SJ-70, University of Washington, 98195, Seattle, WA, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Biochemistry SJ-70, University of Washington, 98195, Seattle, WA</wicri:regionArea><placeName><region type="state">Washington (État)</region><settlement type="city">Seattle</settlement></placeName><orgName type="university">Université de Washington</orgName></affiliation></author><author><name sortKey="Stettler, R F" sort="Stettler, R F" uniqKey="Stettler R" first="R F" last="Stettler">R F Stettler</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="1994">1994</date><idno type="RBID">pubmed:24177929</idno><idno type="pmid">24177929</idno><idno type="doi">10.1007/BF00222447</idno><idno type="wicri:Area/Main/Corpus">004B12</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">004B12</idno><idno type="wicri:Area/Main/Curation">004B12</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">004B12</idno><idno type="wicri:Area/Main/Exploration">004B12</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Molecular genetics of growth and development in Populus. II. Segregation distortion due to genetic load.</title><author><name sortKey="Bradshaw, H D" sort="Bradshaw, H D" uniqKey="Bradshaw H" first="H D" last="Bradshaw">H D Bradshaw</name><affiliation wicri:level="4"><nlm:affiliation>Department of Biochemistry SJ-70, University of Washington, 98195, Seattle, WA, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Biochemistry SJ-70, University of Washington, 98195, Seattle, WA</wicri:regionArea><placeName><region type="state">Washington (État)</region><settlement type="city">Seattle</settlement></placeName><orgName type="university">Université de Washington</orgName></affiliation></author><author><name sortKey="Stettler, R F" sort="Stettler, R F" uniqKey="Stettler R" first="R F" last="Stettler">R F Stettler</name></author></analytic><series><title level="j">TAG. Theoretical and applied genetics. 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Several hypotheses for the mechanism of segregation distortion at this locus were tested, including directional chromosome loss, segregation of a pollen lethal allele, conflicts between genetic factors that isolate the parental species, and inbreeding depression as a result of genetic load. Breeding experiments to produce inbred and outcrossed progenies were combined with PCR-based detection of RFLPs to follow the fate of the deficient allele throughout embryo and seedling development. A recessive lethal allele, lth, inherited from the P. trichocarpa parent, was found to be tightly linked to the RFLP marker locus POP1054 and to cause embryo and seedling mortality. Heterozygotes (lth/+) appear to be phenotypically normal as embryos, seedlings, and young trees. </div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">24177929</PMID><DateCompleted><Year>2013</Year><Month>11</Month><Day>04</Day></DateCompleted><DateRevised><Year>2018</Year><Month>11</Month><Day>13</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0040-5752</ISSN><JournalIssue CitedMedium="Print"><Volume>89</Volume><Issue>5</Issue><PubDate><Year>1994</Year><Month>Nov</Month></PubDate></JournalIssue><Title>TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik</Title><ISOAbbreviation>Theor Appl Genet</ISOAbbreviation></Journal><ArticleTitle>Molecular genetics of growth and development in Populus. II. Segregation distortion due to genetic load.</ArticleTitle><Pagination><MedlinePgn>551-8</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1007/BF00222447</ELocationID><Abstract><AbstractText>Distortion of expected Mendelian segregation ratios, commonly observed in many plant taxa, has been detected in an experimental three-generation inbred pedigree of Populus founded by interspecific hybridization between P. trichocarpa and P. deltoides. An RFLP linkage map was constructed around a single locus showing severe skewing of segregation ratio against F2 trees carrying the P. trichocarpa allele in homozygous form. Several hypotheses for the mechanism of segregation distortion at this locus were tested, including directional chromosome loss, segregation of a pollen lethal allele, conflicts between genetic factors that isolate the parental species, and inbreeding depression as a result of genetic load. Breeding experiments to produce inbred and outcrossed progenies were combined with PCR-based detection of RFLPs to follow the fate of the deficient allele throughout embryo and seedling development. A recessive lethal allele, lth, inherited from the P. trichocarpa parent, was found to be tightly linked to the RFLP marker locus POP1054 and to cause embryo and seedling mortality. Heterozygotes (lth/+) appear to be phenotypically normal as embryos, seedlings, and young trees. </AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Bradshaw</LastName><ForeName>H D</ForeName><Initials>HD</Initials><Suffix>Jr</Suffix><AffiliationInfo><Affiliation>Department of Biochemistry SJ-70, University of Washington, 98195, Seattle, WA, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Stettler</LastName><ForeName>R F</ForeName><Initials>RF</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>Germany</Country><MedlineTA>Theor Appl Genet</MedlineTA><NlmUniqueID>0145600</NlmUniqueID><ISSNLinking>0040-5752</ISSNLinking></MedlineJournalInfo></MedlineCitation><PubmedData><History><PubMedPubDate 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