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. 2025 Jul 16:19:117-123.
doi: 10.3897/compcytogen.19.156983. eCollection 2025.

Non-canonical telomeric motif TTAGGGGTGG in the true bug species Geocorisdispar Waga, 1839 (Heteroptera, Geocoridae)

Natalia Golub  1 , Boris Anokhin  1 , Valentina Kuznetsova  1
Affiliations

Non-canonical telomeric motif TTAGGGGTGG in the true bug species Geocorisdispar Waga, 1839 (Heteroptera, Geocoridae)

Natalia Golub et al. Comp Cytogenet. .

Abstract

We report on the results of a chromosomal study of the big-eyed true bug Geocorisdispar Waga, 1839 (Heteroptera: Geocoridae) aimed at obtaining data on its telomeres. Using fluorescence in situ hybridization (FISH), we have shown, that G.dispar has a non-canonical 10-bp telomeric motif TTAGGGGTGG. This is the first evidence of telomere structure in the family Geocoridae and the first finding of the telomeric sequence (TTAGGGGTGG) n in the large superfamily Lygaeoidea (infraorder Pentatomomorpha).

Keywords: (TTAGGGGTGG)n telomeric sequence; FISH; Geocorisdispar; Hemiptera; Lygaeoidea; Pentatomomorpha.

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Figures

Figure 1.
Figure 1.
Meiotic karyotype (diakinesis stage) of G.dispar after Shiff-Giemsa staining (a) and after FISH with the (TTAGGGGTGG)n telomeric probe (b). Bright green signals at the ends of the chromosomes (b) indicate the presence of the TTAGGGGTGG motif. Scale bars: 10 μm (a); 50 μm (b).
Figure 2.
Figure 2.
Telomeric repeats found in three superfamilies of Pentatomomorpha mapped onto the phylogenetic tree (according to Weirauch et al. 2019).
See this image and copyright information in PMC

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