Inversion polymorphisms in Japanese natural populations of Drosophila melanogaster.

Epistatic interaction between unlinked inversions in Indian natural populations of Drosophila melanogaster

“…In the majority of cases, for example, (In(2L)t-In(3L)P, In(2L)t-In(3L)IB, In(2L)t-In(3R)C, In(2L)t-In(3R)Mo, In(2R)NS-In(3L)P, In(2R)NS-In(3L)IB, In(2R)NS-In(3R)P and In(2R)NSIn(3R)Mo), the differences between observed and expected numbers of various interchromosomal combinations are non-significant (data not shown). However (Alahiotis et al, 1976;Choi, 1977;Langley et al, 1977;Inoue and Watanabe, 1979;Yamaguchi et al, 1980;Knibb et al, 1981;Aulard and Lemeunier, 1985) but not in others (Mukai et al, 1974;Stalker, 1976;Mukai and Voelker, 1977;Voelker et al, 1977;Paik and Yang, 1983;Yamazaki et al, 1984;Aulard and Lemeunier, 1985).…”

“…In general, relative selective values can properly be assigned to the genetic system as a whole and thus evolution depends upon the fitting together of a harmonious system of gene effects (Wright, 1964 (Alahiotis et al, 1976;Stalker, 1976;Choi, 1977;Langley et al, 1977;Inoue and Watanabe, 1979;Yamaguchi et al, 1980;Knibb et al, 1981;Yamazaki et al, 1984;Aulard and Lemeunier, 1985;Afonso et al, 1985).…”

Allozyme polymorphism at the αGpdh and Adh loci and fitness in Drosophila melanogaster

“…That could also explain the close association between In(2L)t and aGpdh-F and Adh-S alleles at low latitudes (Knibb, 1983;Inoue et a!., 1984). However the In(2L)t dines is insufficient to explain the aGpdh and Adh dines over relatively high latitudes (Voelker et al, 1978;Oakeshott et a!., 1984b;Anderson et al, 1987) where In(2L)t is rare.…”

“…The In(2L)t includes the cxGpdh locus but not the Adh locus, although the latter is near one of the two extremes of the In(2L)t. The association between In(2L)t and the cxGpdh-F and Adh-S alleles is common (Watanabe and Watanabe, 1977;Inoue et aL, 1984). The meaning of these nonrandom associations is subject to contradictory interpretations: for some Lewontin, 1968, 1971;Dobzhansky, 1970) they are clear examples of selective coadaptation; for others (Nei, 1975;Li, 1975, 1980) they can be explained as random genetic drift or as a disequilibrium of the initial linkage when the inversion took place and are, therefore, compatible with allelic neutrality.…”

Association among quantitative, chromosomal and enzymatic traits in a natural population of Drosophila melanogaster

“…In the species Drosophila melanogaster, the existence of latitudinal clines has been demonstrated for morphological and physiological characters (Tantawy and Mallah, 1961; David and Bocquet, 1975;David et al, 1977;Stalker, 1980;Cohan and Graf, 1985;Watada et al, 1986;Coyne and Beecham, 1987), additive genetic variance of viability (Kusakabe and Mukai, 1984), chromosome inversion polymorphism (Mettler et al, 1977;Inoue and Watanabe, 1979;Stalker, 1980;Knibb et al, 1981), and allozyme frequencies (Schaffer and Johnson, 1974;Voelker et al, 1978;Singh et al, 1982;Anderson and Oakeshott, 1984;Inoue et al, 1984;Singh and Rhomberg, 1987). Nevertheless, a clear connection among morphological, chromosomal and enzymatic clines has not yet been well established (Voelker et al, 1978;Stalker, 1980;Knibb, 1983;Kusakabe and Mukai, 1984).…”