KARYOTYPE, RIBOSOMAL GENES, AND TELOMERIC SEQUENCES IN THE CRAYFISH PROCAMBARUS CLARKII (DECAPODA: CAMBARIDAE)

被引：15

作者：

Salvadori, Susanna ^{[1
]}

Coluccia, Elisabetta ^{[1
]}

Deidda, Federica ^{[1
]}

Cau, Angelo ^{[1
]}

Cannas, Rita ^{[1
]}

Lobina, Cinzia ^{[1
]}

Sabatini, Andrea ^{[1
]}

Deiana, Anna Maria ^{[1
]}

机构：

[1] Univ Cagliari, Dipartimento Sci Vita & Ambiente, I-09126 Cagliari, Italy

来源：

JOURNAL OF CRUSTACEAN BIOLOGY | 2014年 / 34卷 / 04期

关键词：

Cambaridae; Decapoda; ribosomal genes; telomeres; FRESH-WATER; KARYOLOGICAL ANALYSES; CHROMOSOMES; PARASTACIDAE; CRUSTACEA; ASTACIDAE; LOBSTER; NUCLEAR; ORIGIN; DNA;

D O I：

10.1163/1937240X-00002247

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

Mitotic and meiotic chromosomes of the crayfish Procambarus clarkii (Girard, 1852) were characterized by means of heterochromatin staining techniques (C-, DAPI- and CMA(3)-bandings), and FISH of major ribosomal genes and telomeric pentameric repeat (TTAGG)(n). Nucleolar organizer regions have been located on four chromosome pairs. GC-rich heterochromatin was mostly associated with NORs, and brightly fluorescent centromeric/pericentromeric AT-rich bands were present in most chromosomes. Telomeric pentameric repeats (TTAGG)(n), occurred in all the P. clarkii telomeres and in the interstitial region of the largest chromosome pair, not co-located to ribosomal genes; as possible explanation of the origin of this chromosome, a fusion event was hypothesized.

引用

页码：525 / 531

页数：7

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