NDLI: Molecular divergence of the W chromosomes in pyralid moths (Lepidoptera)

Content Provider	Springer Nature Link
Author	Vítková, Magda Fuková, Iva Kubíčková, Svatava Marec, František
Copyright Year	2007
Abstract	Most Lepidoptera have a WZ/ZZ sex chromosome system. We compared structure of W chromosomes in four representatives of the family Pyralidae—Ephestia kuehniella, Cadra cautella, Plodia interpunctella, and Galleria mellonella—tracing pachytene bivalents which provide much higher resolution than metaphase chromosomes. In each species, we prepared a W-chromosome painting probe from laser-microdissected W-chromatin of female polyploid nuclei. The Ephestia W-probe was cross-hybridized to chromosomes of the other pyralids to detect common parts of their W chromosomes, while the species-specific W-probes identified the respective W chromosome. This so-called Zoo-FISH revealed a partial homology of W-chromosome regions between E. kuehniella and two other pyralids, C. cautella and P. interpunctella, but almost no homology with G. mellonella. The results were consistent with phylogenetic relationships between the species. We also performed comparative genomic hybridization, which indicated that the W chromosome of C. cautella is composed mainly of repetitive DNA common to both sexes but accumulated in the W chromosome, whereas E. kuehniella, P. interpunctella, and G. mellonella W chromosomes also possess a large amount of female specific DNA sequences, but differently organized. Our results support the hypothesis of the accelerated molecular divergence of the lepidopteran W chromosomes in the absence of meiotic recombination.
Starting Page	917
Ending Page	930
Page Count	14
File Format	PDF
ISSN	09673849
Journal	Chromosome Research
Volume Number	15
Issue Number	7
e-ISSN	15736849
Language	English
Publisher	Springer Netherlands
Publisher Date	2007-11-07
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	CGH chromosome painting evolution laser microdissection Pyralidae sex chromosomes Zoo-FISH Cell Biology Human Genetics Animal Genetics and Genomics Plant Genetics & Genomics
Content Type	Text
Resource Type	Article
Subject	Genetics

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