Abstract:
:In the parasitic wasp Nasonia vitripennis, certain males carry a B chromosome, called PSR (paternal sex ratio), which causes the compaction and subsequent loss of the paternal chromosomes in fertilized eggs. Because Nasonia are haplo-diploid, this leads to the production of all-male broods. Three families (PSR2, PSR18, PSR22) of related, tandemly repetitive DNAs were shown to be present solely on the PSR chromosome. These three families shared two conserved, palindromic DNA sequences, which may play a role in either PSR function or amplification of the tandem arrays. The tandem repeat family NV79 was determined to be present on the PSR chromosome as well as on at least one of the A chromosomes. This shared repeat as well as two repeat families (NV85, NV126) that were localized on the A chromosomes were detected in two sibling species of N. vitripennis. NV79 and NV126 were also found in the more distantly related species, Trichomalopsis dubius.
journal_name
Chromosomajournal_title
Chromosomaauthors
Eickbush DG,Eickbush TH,Werren JHdoi
10.1007/BF00660317subject
Has Abstractpub_date
1992-08-01 00:00:00pages
575-83issue
9eissn
0009-5915issn
1432-0886journal_volume
101pub_type
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