Genome size evolution in the beetle genus Diabrotica

Author:

Lata Dimpal1ORCID,Coates Brad S2ORCID,Walden Kimberly K O3ORCID,Robertson Hugh M3ORCID,Miller Nicholas J1ORCID

Affiliation:

1. Department of Biological Sciences, Illinois Institute of Technology, Chicago, IL 60616, USA

2. USDA-ARS, Corn Insects & Crop Genetics Research Unit, Ames, IA 50011, USA

3. Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA

Abstract

Abstract Diabrocite corn rootworms are one of the most economically significant pests of maize in the United States and Europe and an emerging model for insect–plant interactions. Genome sizes of several species in the genus Diabrotica were estimated using flow cytometry along with that of Acalymma vittatum as an outgroup. Genome sizes ranged between 1.56 and 1.64 gigabase pairs and between 2.26 and 2.59 Gb, respectively, for the Diabrotica subgroups fucata and virgifera; the Acalymma vittatum genome size was around 1.65 Gb. This result indicated that a substantial increase in genome size occurred in the ancestor of the virgifera group. Further analysis of the fucata group and the virgifera group genome sequencing reads indicated that the genome size difference between the Diabrotica subgroups could be attributed to a higher content of transposable elements, mostly miniature inverted-transposable elements and gypsy-like long terminal repeat retroelements.

Funder

United States Department of Agriculture National Institute of Food and Agriculture

USDA Agricultural Research Service (ARS) (CRIS

USDA or United States government determination of policy

Publisher

Oxford University Press (OUP)

Subject

Genetics (clinical),Genetics,Molecular Biology

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