Genome size evaluations in cockroaches: New entries |
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| Authors: | Manuela Monti CarloAlberto Redi Ernesto Capanna |
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| Affiliation: | 1.Department of Public Health, Experimental and Forensic Medicine, Histology and Embryology Unit, University of Pavia;2.Department of Biology and Biotechnology “Lazzaro Spallanzani”, University of Pavia;3.Department of Animal Biology “Agostino Bassi”, “La Sapienza” University of Rome, Italy |
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| Abstract: | In this paper, we report genome size (GS) values for nine cockroaches (order Blattodea, families Blattidae, Blaberidae and Ectobiidae, ex Blattelidae), three of which are original additions to the ten already present in the GS database: the death’s head roach (Blaberus craniifer), the Surinam cockroach (Pycnoscelus surinamensis) and the Madeira cockroach (Leucophaea maderae). Regarding the American cockroach (Periplaneta americana), the GS database contains two contrasting values (2.72 vs 3.41 pg); likely, the 2.72 pg value is the correct one as it is strikingly similar to our sperm DNA content evaluation (2.80 ± 0.11 pg). Also, we suggest halving the published GS of the Argentine cockroach Blaptica dubia and the spotted cockroach (the gray cockroach) Nauphoeta cinerea discussing i) the occurrence of a correlation between increasing 2n chromosome number and GS within the order Blattodea; and ii) the possible occurrence of a polyploidization phenomenon doubling a basic GS of 0.58 pg of some termite families (superfamily Blattoidea, epifamily Termitoidae).Key words: genome size, C-DNA content, cockroaches, Blattodea |
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