Please use this identifier to cite or link to this item: https://biore.bio.bg.ac.rs/handle/123456789/457
Title: Heterozygosity maintains developmental stability of sternopleural bristles in Drosophila subobscura interpopulation hybrids
Authors: Novicic, Zorana Kurbalija
Stamenković Radak, Marina 
Pertoldi, Cino
Jelić, Mihailo 
Savić Veselinović, Marija 
Andjelkovic, Marko
Keywords: Developmental homeostasis;Fluctuating asymmetry;Genome coadaptation;Hybridization;Phenotypic variance
Issue Date: 1-Dec-2011
Journal: Journal of Insect Science
Abstract: 
Interpopulation hybridization can lead to outbreeding depression within affected populations due to breakdown of coadapted gene complexes or heterosis in hybrid populations. One of the principal methods commonly used to estimate the level of developmental instability (DI) is fluctuating asymmetry (FA). We used three genetically differentiated Drosophila subobscura populations according to inversion polymorphism analysis and measured the variability of sternopleural bristle number and change in FA across generations P, F1, and F2 between intraand interpopulation hybrids of D. subobscura. The mean variability of sternopleural bristle number in intra- and interpopulation hybrids of D. subobscura across generations cannot determine whether the changes at the level of developmental homeostasis are due exclusively to genomic coadaptation or to heterozygosity. Phenotypic variance (Vp) and FA of sternopleural bristle number was higher in interpopulation than in intrapopulation hybrids across generations. F1 hybrids were more developmentally stable compared to each parental population in both intraand interpopulation hybrids. The most probable mechanism providing developmental homeostasis is heterozygote or hybrid superiority, also called overdominace. However, Vpwas higher and FA lower in the F2 generation when compared to F1, due mainly to crossing-over in the formation of F2.
URI: https://biore.bio.bg.ac.rs/handle/123456789/457
DOI: 10.1673/031.011.11301
Appears in Collections:Journal Article

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