1. RODNA
  2. FCEN
  3. FCEN - Facultad de Ciencias Exactas y Naturales. UBA
Registro completo de metadatos
Campo DC Valor Lengua/Idioma
dc.provenanceFacultad de Ciencias Exactas y Naturales de la UBA-
dc.contributorHunziker, J.H.-
dc.contributor<div class="autor_fcen" id="9216">Wulff, A.F.</div>-
dc.contributorEscobar, A.-
dc.creatorHunziker, J.H.-
dc.creator<div class="autor_fcen" id="9216">Wulff, A.F.</div>-
dc.creatorEscobar, A.-
dc.date.accessioned2018-05-04T22:04:56Z-
dc.date.accessioned2018-05-28T15:47:37Z-
dc.date.available2018-05-04T22:04:56Z-
dc.date.available2018-05-28T15:47:37Z-
dc.date.issued2002-
dc.identifier.urihttp://10.0.0.11:8080/jspui/handle/bnmm/68329-
dc.descriptionThe karyotype of Baccharis coridifolia DC., a dioecious diploid species consists of 16 chromosomes with median (m) and 2 with submedian centromeric positions (sm) (2n = 18). Meiotic analyses of 219 male plants belonging to 12 populations showed across a wide geographical range one quadrivalent and seven bivalents in all of them. The quadrivalent involves the four biggest m chromosomes and probably constitutes a sex multivalent carrying in tight linkage the sex genes and provides a mechanism whereby permanent translocation heterozygosity is maintained. In metaphase I alternate orientation of the quadrivalent was predominant (85.71 %). Fourteen megaspore mother cells were analyzed and did not show the quadrivalent. A model for the origin and maintenance of the sexual translocation system is presented. It is assumed that there are two non-allelic factors M and n; M would be a dominant female suppresor and n a recessive male-suppresor. The excess of male plants observed in several populations at different localities might result from heterotic effects of some gene complexes carried by the translocation. This excess probably ensures a good supply of pollen for the vagaries of insect pollination at flowering time.-
dc.descriptionFil:Wulff, A.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.-
dc.formatapplication/pdf-
dc.languageeng-
dc.rightsinfo:eu-repo/semantics/openAccess-
dc.rightshttp://creativecommons.org/licenses/by/2.5/ar-
dc.sourceHereditas 2002;137(2):132-139-
dc.source.urihttp://digital.bl.fcen.uba.ar/Download/paper/paper_00180661_v137_n2_p132_Hunziker.pdf-
dc.subjectallele-
dc.subjectarticle-
dc.subjectAsteraceae-
dc.subjectcentromere-
dc.subjectchromosome-
dc.subjectchromosome bivalent-
dc.subjectchromosome translocation-
dc.subjectcontrolled study-
dc.subjectdiploidy-
dc.subjectdominant gene-
dc.subjectflowering-
dc.subjectgenetic linkage-
dc.subjectgeographic distribution-
dc.subjectheterozygosity-
dc.subjectkaryotype-
dc.subjectmeiosis-
dc.subjectmetaphase-
dc.subjectnonhuman-
dc.subjectplant insect interaction-
dc.subjectpollen-
dc.subjectpollen mother cell-
dc.subjectpollination-
dc.subjectpopulation genetics-
dc.subjectrecessive gene-
dc.subjectsex ratio-
dc.subjectsuppressor gene-
dc.subjectAsteraceae-
dc.subjectChromosomes, Plant-
dc.subjectHeterozygote-
dc.subjectTranslocation, Genetic-
dc.subjectAsteraceae-
dc.subjectBaccharis-
dc.subjectEmbryophyta-
dc.subjectInsecta-
dc.titlePermanent translocation heterozygosity in dioecious Baccharis coridifolia DC. (Asteraceae)-
dc.typeinfo:eu-repo/semantics/article-
dc.typeinfo:ar-repo/semantics/artículo-
dc.typeinfo:eu-repo/semantics/publishedVersion-
Aparece en las colecciones: FCEN - Facultad de Ciencias Exactas y Naturales. UBA

Ficheros en este ítem:
No hay ficheros asociados a este ítem.
Mostrar el registro sencillo del ítem