Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/22624
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dc.contributor.authorGregg, Peteren
dc.contributor.authorWebb, G Cen
dc.contributor.authorAdena, M Aen
dc.date.accessioned2018-02-26T16:05:00Z
dc.date.issued1984en
dc.identifier.citationCanadian Journal of Genetics and Cytology, 26(2), p. 194-208en
dc.identifier.issn0831-2796en
dc.identifier.issn0008-4093en
dc.identifier.issn1480-3321en
dc.identifier.urihttps://hdl.handle.net/1959.11/22624en
dc.description.abstractThe B chromosomes of Chortoicetes terminifera possess an accumulation mechanism. B chromosomes were transmitted at a rate of 0.766 in one B(♂) × zero B(♀) crosses and 0.477 in zero B(♂) one × B(♀) crosses. In crosses where the female had a B chromosome, there were significant differences in transmission rates between pods, but these were not related to differences in G-banding patterns of the B chromosomes involved. In crosses where either the male or female parent had two B chromosomes the B chromosomes did not segregate perfectly, nor did they segregate in a random fashion. The closest resemblance to the behaviour of normal bivalents occurred when the two B chromosomes were of the same, rather than different, G-banding variants, and when they were present in the male rather than the female parent. B chromosomes occurred at eight localities scattered throughout New South Wales. No locality was found where they were not present. The average frequency of B chromosomes was 14.0% for one-B individuals and 0.8% for two-B individuals. There were no significant differences in B-chromosome frequency between males and females. Of the eight localities, only one had a B-chromosome frequency significantly different from any other locality. This relatively uniformity of B-chromosome distribution is interpreted as a consequence of the migratory nature of C. terminifera. A model was constructed to simulate the dynamics of B chromosomes in locust populations. Three main dynamic patterns were recognized, and these were related to differences in the fitness of one-B and two-B individuals. It was concluded that the B chromosome of C. terminifera is probably parasitic, although the simulation model revealed some difficulties which suggest that caution should be applied to the description of any B chromosome as purely parasitic.Key words: B chromosomes, locust, meiotic drive, G-banding, fitness. Chortoicetes terminifera (Walker).en
dc.languageenen
dc.publisherNRC Research Pressen
dc.relation.ispartofCanadian Journal of Genetics and Cytologyen
dc.titleThe dynamics of B chromosomes in populations of the Australian plague locust, 'Chortoicetes terminifera' (Walker)en
dc.typeJournal Articleen
dc.identifier.doi10.1139/g84-033en
dc.subject.keywordsPopulation, Ecological and Evolutionary Geneticsen
local.contributor.firstnamePeteren
local.contributor.firstnameG Cen
local.contributor.firstnameM Aen
local.subject.for2008060411 Population, Ecological and Evolutionary Geneticsen
local.subject.seo2008970106 Expanding Knowledge in the Biological Sciencesen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailpgregg@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-chute-20171110-145059en
local.publisher.placeCanadaen
local.format.startpage194en
local.format.endpage208en
local.peerreviewedYesen
local.identifier.volume26en
local.identifier.issue2en
local.contributor.lastnameGreggen
local.contributor.lastnameWebben
local.contributor.lastnameAdenaen
dc.identifier.staffune-id:pgreggen
local.profile.orcid0000-0001-7534-3567en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:22810en
local.identifier.handlehttps://hdl.handle.net/1959.11/22624en
dc.identifier.academiclevelAcademicen
local.title.maintitleThe dynamics of B chromosomes in populations of the Australian plague locust, 'Chortoicetes terminifera' (Walker)en
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.description.statisticsepubsVisitors: 2<br />Views: 2<br />Downloads: 0en
Appears in Collections:Journal Article
School of Environmental and Rural Science
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