Latitudinal variation in octanol dehydrogenase and acid phosphatase allele frequencies in Drosophila melanogaster

1983 ◽  
Vol 65 (3) ◽  
pp. 191-196 ◽  
Author(s):  
J. G. Oakeshott ◽  
J. B. Gibson ◽  
D. A. Willcocks ◽  
G. K. Chambers
Keyword(s):  
Drosophila Melanogaster ◽  
Acid Phosphatase ◽  
Allele Frequencies ◽  
Latitudinal Variation ◽  
Octanol Dehydrogenase

Fitness components at the octanol dehydrogenase locus in Drosophila melanogaster

Genetica ◽  
1989 ◽  
Vol 79 (2) ◽  
pp. 133-138 ◽  
Author(s):  
K. Pecsenye
Keyword(s):  
Drosophila Melanogaster ◽  
Fitness Components ◽  
Octanol Dehydrogenase

Recent findings in oogenesis of Drosophila melanogaster

Development ◽  
1977 ◽  
Vol 39 (1) ◽  
pp. 45-57
Author(s):  
F. Giorgi ◽  
J. Jacob
Keyword(s):  
Drosophila Melanogaster ◽  
Acid Phosphatase ◽  
Ovarian Development ◽  
Superficial Layer ◽  
Blood Proteins ◽  
Selective Hydrolysis ◽  
Internal Lining ◽  
Hydrolysis Of ◽  
Zinc Iodide ◽  
Yolk Platelet

The role played by the vitellogenic oocytes of Drosophila melanogaster in relation to the elaboration of material taken from the haemolymph is examined by ultrastructural cytochemistry. As revealed by the Gomori procedure, acid phosphatase occurs widely over the forming yolk platelets of the cortical and central ooplasm. A number of Golgi apparatuses in thecortical ooplasm are also positively stained with lead precipitates. With the proceeding of the ovarian development it becomes progressively more difficult to demonstrate cytochemically the enzyme over the yolk platelets. In stage 9–10 chambers the acid phosphatase is restricted to the so-called associated body, while the rest of the yolk platelet appears devoid of lead deposits. By using a osmium zinc iodide (OZ1) complex as a preferential staining method for the Golgi apparatus, it has been shown that, apart from the apparatus itself, a number of OZI deposits occur over the superficial layer of the forming yolk platelets. When mature yolk platelets are formed at later stages, the OZI deposits in the yolk platelets come to be restricted to the cap-like region of the superficial layer which contains the associated body. In vitellogenic oocytes, both the internal lining of the limiting membrane of the forming yolk platelets and the associated body of the mature yolk platelets react positively, to cytochemical methods to demonstrate carbohydrates. The present findings are interpreted as indicating the involvement of lysosomal enzymes in the process of maturation of the yolk material. The suggestion is also made that such an involvement is required to accomplish a selective hydrolysis of those blood proteins which have been taken in by vitellogenic oocytes along with yolk precursors.

Combined histochemical and x-ray microanalytical studies on the copper-accumulating granules in the mid-gut of larval Drosophila

1977 ◽  
Vol 26 (1) ◽  
pp. 201-215
Author(s):  
R.L. Tapp ◽  
A. Hockaday
Keyword(s):  
Drosophila Melanogaster ◽  
Acid Phosphatase ◽  
Energy Dispersive ◽  
X Ray ◽  
Gut Epithelium

The copper-containing granules in the mid-gut epithelium of larval Drosophila melanogaster were examined for acid phosphatase by combined histochemistry and energy-dispersive, X-ray microanalysis. After incubation, many of the granules were shown to contain simultaneously copper and sulphur (which are normal constituents), and lead and phosphorus (which are the detectable elements of the reaction product). Earlier work has been consolidated and extended and the evidence that the granules are formed as cytolysosomes is reviewed.

Regulation of acid phosphatase activity in the ovary of Drosophila melanogaster

1975 ◽  
Vol 47 (1) ◽  
pp. 196-205 ◽  
Author(s):  
John H. Postlethwait ◽  
Pat Gray
Keyword(s):  
Drosophila Melanogaster ◽  
Acid Phosphatase ◽  
Phosphatase Activity ◽  
Acid Phosphatase Activity

Position effect variegation of an acid phosphatase gene in Drosophila melanogaster

1984 ◽  
Vol 197 (3) ◽  
pp. 403-413 ◽  
Author(s):  
M. C. Frisardi ◽  
Ross J. MacIntyre
Keyword(s):  
Drosophila Melanogaster ◽  
Acid Phosphatase ◽  
Position Effect ◽  
Position Effect Variegation ◽  
Effect Variegation ◽  
Acid Phosphatase Gene

Induction of null-activity mutants for the acid phosphatase-1 gene in Drosophila melanogaster

1972 ◽  
Vol 6 (2-3) ◽  
pp. 205-216 ◽  
Author(s):  
John B. Bell ◽  
Ross J. MacIntyre ◽  
Allan P. Olivieri
Keyword(s):  
Drosophila Melanogaster ◽  
Acid Phosphatase

scholarly journals LATITUDINAL VARIATION IN DEVELOPMENTAL TIME AND MASS IN DROSOPHILA MELANOGASTER

Evolution ◽  
1996 ◽  
Vol 50 (6) ◽  
pp. 2523-2529 ◽  
Author(s):  
Wade B. Worthen
Keyword(s):  
Drosophila Melanogaster ◽  
Developmental Time ◽  
Latitudinal Variation

Latitudinal Variation of Wing: Thorax Size Ratio and Wing-Aspect Ratio in Drosophila melanogaster

Evolution ◽  
1998 ◽  
Vol 52 (5) ◽  
pp. 1353 ◽  
Author(s):  
Ricardo B. R. Azevedo ◽  
Avis C. James ◽  
Jennie McCabe ◽  
L. Partridge
Keyword(s):  
Drosophila Melanogaster ◽  
Aspect Ratio ◽  
Size Ratio ◽  
Latitudinal Variation ◽  
Wing Aspect Ratio

Latitudinal Variation in Developmental Time and Mass in Drosophila melanogaster

Evolution ◽  
1996 ◽  
Vol 50 (6) ◽  
pp. 2523 ◽  
Author(s):  
Wade B. Worthen
Keyword(s):  
Drosophila Melanogaster ◽  
Developmental Time ◽  
Latitudinal Variation

When a Fly Has to Fly to Reproduce: Selection against Conditional Recessive Lethals in Drosophila

2010 ◽  
Vol 72 (1) ◽  
pp. 12-15 ◽  
Author(s):  
Andrea D. Plunkett ◽  
Lev Y. Yampolsky
Keyword(s):  
Drosophila Melanogaster ◽  
Allele Frequency ◽  
Experimental Model ◽  
Food Source ◽  
Allele Frequencies ◽  
Frequency Change ◽  
Evolutionary Patterns ◽  
Visible Marker ◽  
Meaningful Comparison ◽  
Marker Alleles

We propose an experimental model suitable for demonstrating allele frequency change in Drosophila melanogaster populations caused by selection against an easily scorable conditional lethal, namely recessive flightless alleles such as apterous and vestigial. Homozygotes for these alleles are excluded from reproduction because the food source used to establish each generation is accessible only by flight. The observed dynamics of flightless-allele frequencies generally follows the theoretically predicted pattern, with slight deviation toward less intense selection. We also suggest observing selection against flight-independent visible marker alleles in the same population as a meaningful comparison. The proposed experiments can easily be scheduled within one semester, and the expected data provide ample opportunities for discussion of quantitative evolutionary patterns.

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