Genetic differentiation between natural populations of Drosophila subobscura in the Western Mediterranean Area with respect to chromosomal variation

Abstract

SummaryThe chromosomal arrangement frequencies of 27 populations of Drosophila subobscura from the western Mediterranean region have been compared. To evaluate the relationships between these populations, factorial analysis of correspondences (B ENZECRI , 1973) and a distance proposed by P REVOSTI (1974 a)

O chromosome inversion polymorphism in Northern and Atlantic Europe and its implications in the American colonization by Drosophila subobscura

“…The 0 3 + 4 + 1 2 inversion (Fig. 3), detected in Ter-Ape1 and all French populations, is found at a low frequency all over Europe (STUMM-ZOLLINGER 1953;KRIMBAS 1964b;PREVOSTI 1966;PINSKER et al 1978;PINSKER and SPERLICH 1981;PREVOSTI et al 1984;BURLA et al 1986 andGOSTELI 1990). Two additional arrangements including the 0(12) inversion were found: the 0 3 + 4 + 8 + 1 2 arrangement detected in Gesten and the O3+4+12+13 inversion (Fig.…”

“…Excluding Scotland, where it can reach frequencies higher than 20 %, the arrangement was always detected in low frequencies in the rest of the distribution area (CHARLES-WORTH et al 1979;PINSKER and SPERLICH 1981 ;DE FRUTOS and PREVOSTI 1984;PINSKER and BOHM 1989). This is the first time that this arrangement has been detected in Scandinavia, although the following arrangements have also been reported in the Western Mediterranean area: O3+4+23+6, 0 3 + 4 + 2 3 + 1 and 0 3 + 4 + 2 3 + 2(KUNZE-MWHL and SPERLICH 1955;SPERLICH 1961 ;PREVOSTI 1964;JUNGEN 1968; MALOGOLOWKIN-COHEN and SPER-LICH 1981;PINSKER and SPERLICH 1981;FONTDEVILA et al 1983;PREVOSTI et al 1984;BREHM and KRIMBAS 1987).…”

Inbreeding and thermal adaptation inDrosophila subobscura

“…However, the inbred line with the fixed arrangement O 3+4+7 was really surprising. This arrangement is very uncommon in the Balkan region (Krimbas 1993;Zivanovic et al 1995Zivanovic et al , 2002Zivanovic et al , 2012Zivanovic 2007;Zivanovic andMestres 2010a, 2011), but it is frequent in the Western Mediterranean (Prevosti et al 1984;Krimbas 1993;Orengo and Prevosti 1996;Solé et al 2002;Araúz et al 2009) and American colonizing populations (Prevosti et al 1988(Prevosti et al , 1990Balanyà et al 2003;Mestres et al 2009;Castañeda et al 2013). It was also described in Asia Minor and Israel, but data available from these regions are not recent (Goldschmidt 1956;Götz 1967;Malogolowkin-Cohen and Sperlich 1981).…”

Tracking the origin of the American colonization byDrosophila subobscura: genetic comparison between Eastern and Western Mediterranean populations

“…This inversion is rather common in all American colonizing populations and presents a complete association with a lethal gene (Mestres et al 1990(Mestres et al , 1992(Mestres et al , 1995(Mestres et al , 2005Sole´et al 2000). It has never been observed in the Iberian Peninsula (Prevosti 1964(Prevosti , 1966Prevosti et al 1984;Brehm and Krimbas 1987;Orengo and Prevosti 1996;Sole´et al 2002), but it has been described in Greece and Montenegro (Krimbas 1964(Krimbas , 1967. The O 3+4+7 arrangement was obtained in 20 chromosomal lines from Barcelona (17.39%), but it was absent from Mt Parnes.…”

“…The possibility of a Mediterranean origin is also supported by other genetic evidence (Gilchrist et al 2001;Pascual et al 2001Pascual et al , 2007Mestres et al 2004Mestres et al , 2005. Nonetheless, the O 5 inversion, which is rather common in most of the American populations so far analysed (for a review see Balanya`et al 2003), has never been found in the Iberian Peninsula Prevosti et al 1984;Krimbas 1993;Sole´et al 2002). In our study of the Barcelona population we found no sign of this inversion either.…”