Linked Life Data

522871

Source:http://linkedlifedata.com/resource/pubmed/id/522871

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1980-3-24
pubmed:abstractText
After irradiation of mature sperm in males of Tetranychus urticae, early cleavage stages were scored for chromosome fragments. As expected from the presumed holokinetic nature of the chromosomes, the majority (94.29%) of the fragments pass mitosis without difficulty. A minority of the fragments is affected by loss (4.76%) or missegregation (0.95%), leading to loss of fragments from cells in a large fraction of fragment-containing eggs after a few divisions. Lethality induced by the irradiation treatment can probably be ascribed to these losses. When meiotic configurations of F1 females are analysed, translocations turn out to be the most frequent type of aberration, often accompanied by recessive lethal mutations, thus adding an extra amount of lethality to the already high number of non-viable haploid offspring of heterozygous F1 females. The frequently occurring infecundity of the F1 females may be caused by mechanical problems in early stages of meiosis (before oviposition), when multivalents are not able to perform the specific turning movements typical for this type of chromosome. According to calculations, univalents in meiotic stages are thought to represent translocated chromosomes rather than independent fragments.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0027-5107
pubmed:author
pubmed:issnType
Print
pubmed:volume
63
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
301-16
pubmed:dateRevised
2004-11-17
pubmed:meshHeading
pubmed:year
1979
pubmed:articleTitle
Fate of fragments and properties of translocations of holokinetic chromosomes after X-irradiation of mature sperm of Tetranychus urticae Koch (Acari, Tetranychidae).
pubmed:publicationType
Journal Article