Linked Life Data

8914332

Source:http://linkedlifedata.com/resource/pubmed/id/8914332

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1375
pubmed:dateCreated
1996-12-18
pubmed:abstractText
Sperm competition can be a powerful selective force in the evolution of mating systems. Several odonate species have attracted study to assess the extent and mechanism of last-male sperm precedence. Members of the genus Ischnura (Zygoptera) display a particularly interesting range of mating systems, and Ischnura elegans was selected for study. Polymorphic microsatellites were cloned, sequenced and used to determine paternity of I. elegans larvae, to reveal patterns of sperm precedence. More than 3000 larvae, collected from both wild and captively bred I. elegans females, were typed for one or two microsatellite loci and paternity was determined by comparison with parental genotypes. Microsatellite typing showed that most wild-caught females had mated with several males. Analysis of offspring from females which mated in captivity showed that multiple-matings result in a large proportion of last-male sperm precedence (mean value for immediate last male precedence is 0.79 +/- 0.2 (+/- s.d.; n = 11, range = 0.44-1)). There is appreciable variation in the extent and patterns of immediate and longer-term precedence, which could reflect differences in male sperm removal ability or selective use of sperm by females.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0962-8452
pubmed:author
pubmed:issnType
Print
pubmed:day
22
pubmed:volume
263
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1343-9
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Molecular genetic analysis of sperm competition in the damselfly Ischnura elegans (Vander Linden).
pubmed:affiliation
Department of Zoology, Oxford University, U.K.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't