RRC ID 440
Author Abe H, Sugasaki T, Terada T, Kanehara M, Ohbayashi F, Shimada T, Kawai S, Mita K, Oshiki T.
Title Nested retrotransposons on the W chromosome of the wild silkworm Bombyx mandarina.
Journal Insect Mol. Biol.
Abstract The W chromosome of the silkworms Bombyx mori or B. mandarina is recombinationally isolated from the Z chromosome and the autosomes. We previously characterized a female-specific randomly amplified polymorphic DNA (RAPD), designated W-Yamato, derived from the W chromosome of the wild silkworm Bombyx mandarina. To further analyse the W chromosome of B. mandarina, we obtained a lambda phage clone that contains the W-Yamato RAPD sequence and sequenced the 16.7 kb DNA insert. We found that this DNA comprises a nested structure of at least seven elements: six retrotransposons and one transposable element-like sequence. The transposable element-like sequence is inserted into a micropia-like retrotransposon (Karate). The Karate and the non-long terminal repeat (non-LTR) retrotransposon BMC1 are inserted into a 412-like retrotransposon (Judo). Furthermore, this Judo, and two non-LTR retrotransposons (Kurosawa and Kendo) are inserted into a Pao-like retrotransposon (Yamato). These results indicate that the retrotransposons inserted into the W chromosome are not efficiently removed but accumulate gradually as strata without recombination.
Volume 11(4)
Pages 307-14
Published 2002-8
PII 339
PMID 12144695
MeSH Animals Base Sequence Bombyx / chemistry Bombyx / genetics* Chromosome Mapping DNA / chemistry DNA / genetics Female Gene Library Male Molecular Sequence Data Polymerase Chain Reaction Retroelements / genetics* Sequence Analysis, DNA Sequence Homology, Amino Acid Sex Chromosomes / chemistry Sex Chromosomes / genetics*
IF 2.492
Times Cited 21
Silkworms ?