TY - JOUR
T1 - Heterozygosity maintains developmental stability of sternopleural bristles in Drosophila subobscura interpopulation hybrids
AU - Novicic, Zorana Kurbalija
AU - Stamenkovic-Radak, Marina
AU - Pertoldi, Cino
AU - Jelic, Mihailo
AU - Veselinovic, Marija Savic
AU - Andjelkovic, Marko
PY - 2011/8/31
Y1 - 2011/8/31
N2 - 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 intra-and 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 (V-p) 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 intra-and interpopulation hybrids. The most probable mechanism providing developmental homeostasis is heterozygote or hybrid superiority, also called overdominace. However, V-p was higher and FA lower in the F2 generation when compared to F1, due mainly to crossing-over in the formation of F2.
AB - 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 intra-and 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 (V-p) 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 intra-and interpopulation hybrids. The most probable mechanism providing developmental homeostasis is heterozygote or hybrid superiority, also called overdominace. However, V-p was higher and FA lower in the F2 generation when compared to F1, due mainly to crossing-over in the formation of F2.
U2 - 10.1673%2F031.011.11301
DO - 10.1673%2F031.011.11301
M3 - Tidsskriftartikel
SN - 1536-2442
VL - 11
JO - Journal of Insect Science
JF - Journal of Insect Science
ER -