Skip to Main content Skip to Navigation
Journal articles

Drosophila Females Undergo Genome Expansion after Interspecific Hybridization

Abstract : Genome size (or C-value) can present a wide range of values among eukaryotes. This variation has been attributed to differences in the amplification and deletion of different noncoding repetitive sequences, particularly transposable elements (TEs). TEs can be activated under different stress conditions such as interspecific hybridization events, as described for several species of animals and plants. These massive transposition episodes can lead to considerable genome expansions that could ultimately be involved in hybrid speciation processes. Here, we describe the effects of hybridization and introgression on genome size of Drosophila hybrids. We measured the genome size of two close Drosophila species, Drosophila buzzatii and Drosophila koepferae, their F 1 offspring and the offspring from three generations of backcrossed hybrids; where mobilization of up to 28 different TEs was previously detected. We show that hybrid females indeed present a genome expansion, especially in the first backcross, which could likely be explained by transposition events. Hybrid males, which exhibit more variable C-values among individuals of the same generation, do not present an increased genome size. Thus, we demonstrate that the impact of hybridization on genome size can be detected through flow cytometry and is sex-dependent.
Document type :
Journal articles
Complete list of metadata

Cited literature [49 references]  Display  Hide  Download
Contributor : Marie-France Sagot Connect in order to contact the contributor
Submitted on : Monday, August 8, 2016 - 3:14:00 PM
Last modification on : Sunday, September 25, 2022 - 3:54:33 AM


Publisher files allowed on an open archive




Valèria Romero-Soriano, Nelly Burlet, Doris Vela, Antonio Fontdevila, Cristina Vieira, et al.. Drosophila Females Undergo Genome Expansion after Interspecific Hybridization. Genome Biology and Evolution, Society for Molecular Biology and Evolution, 2016, 8 (3), pp.556-561. ⟨10.1093/gbe/evw024⟩. ⟨hal-01352572⟩



Record views


Files downloads