Título:
Chromosome painting in triatomine insects reveals shared sequences between x chromosomes and autosomes
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Autor:
Pita Mimbacas, Sebastián
Panzera Arballo, Francisco
Sánchez, Antonio
Palomeque, Teresa
Lorite, Pedro
Panzera Arballo, Francisco
Sánchez, Antonio
Palomeque, Teresa
Lorite, Pedro
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Artículo
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Palabras clave:
Fluorescence in situ hybridization
Holocentric chromosome
Kissing bug
Microdissection X chromosome
Sex chromosome evolution
Holocentric chromosome
Kissing bug
Microdissection X chromosome
Sex chromosome evolution
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Año de publicación:
2017
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Resumen:
In order to provide a broad picture on the origin and evolution of holocentric X chromosomes in heteropteran species, we prepared a sex chromosome painting probe by microdissection of the X1 and X2 chromosomes from a kissing bug Mepraia spinolai (Hemiptera: Reduviidae: Triatominae). Fluorescence in situ hybridization on four species of the Triatomini having different amounts of autosomal heterochromatin and sex chromosome systems show that the Xs probe hybridizes on the euchromatin, located both on autosomes and X chromosomes. The heterochromatic Y chromosome and autosomal heterochromatic regions always appear free of hybridization signals. The hybridization results of the Xs probe on Rhodnius prolixus (Rhodniini) is completely different to that observed in Triatomini species. The hybridization signals are small and scattered on all euchromatin, without specific regions including the X chromosome. These results are in accordance with previous data obtained by genomic in situ hybridization and fluorescent banding, suggesting a clear differentiation in the repeat sequence composition of both sex chromosomes between Triatomini and Rhodniini tribes. These results also support that each sex chromosome in Triatomini has evolved independently from different autosomal pairs of a common ncestor, as described in other insect orders.
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Pita Mimbacas, S, Panzera Arballo, F, Sánchez, A, [y otros autores]. Chromosome painting in triatomine insects reveals shared sequences between x chromosomes and autosomes Journal of Medical Entomology, 2017, 54(1) 44–49.
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Licencia Creative Commons Atribución - No Comercial - Sin Derivadas (CC - By-NC-ND 4.0)
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| Ficheros | Descripción | Tamaño | Formato | ||
|---|---|---|---|---|---|
| 10.1093jmetjw146_pp.pdf | — | 307.88 KB | Adobe PDF |