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  • 1
    Electronic Resource
    Electronic Resource
    Sex-Ratio Manipulation in Relation to Insect Pest Control (1983)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Genetics 17 (1983), S. 191-214 
    Details
    ISSN: 0066-4197
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ge.17.120183.001203
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  • 2
    Electronic Resource
    Electronic Resource
    Existence of an Optimum Expression Level for Secretion of Foreign Proteins in Yeast (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 745 (1994), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1994.tb44385.x
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  • 3
    Electronic Resource
    Electronic Resource
    The genome of the Mediterranean fruitflyceratitis capitata: Localization of molecular markers by in situ hybridization to salivary gland polytene chromosomes (1992)
    Springer
    Chromosoma 101 (1992), S. 448-455 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract We hybridized cloned DNA segments to salivary gland polytene chromosomes of the medfly,Ceratitis capitata, and thus established molecular markers for 24 sites on 6 out of 10 autosomal arms. An additional marker identified a medfly repetitive element that hybridizes to approximately 100 autosomal sites as well as a granular network that is thought to represent theX chromosome. Some of the markers correspond to 9 characterized transcription units, while 17 remain anonymous; at least 3 of the latter are restriction fragment length polymorphism (RFLP) markers. The characterized transcription units document that chromosomal arm 5L ofC. capitata is homologous to theDrosophila melanogaster X chromosome, in agreement with previous inferences based on the extensive conservation of linkage groups in Diptera.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00582839
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  • 4
    Electronic Resource
    Electronic Resource
    Genetic sexing in Drosophila melanogaster using the alcohol dehydrogenase locus and a Y-linked translocation (1981)
    Springer
    Theoretical and applied genetics 59 (1981), S. 23-24 
    Details
    ISSN: 1432-2242
    Keywords: Genetic sexing ; Alcohol dehydrogenase ; Drosophila
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary By incorporating ethanol (4% v/v) into the larval rearing medium of a specially constructed Drosophila melanogaster strain it was possible to produce only male adults; the female larvae died. In this strain, the male determining chromosome was linked with a positive Alcohol dehydrogenase (ADH) allele by a translocation. The females were homozygous for the null allele and hence sensitive to ethanol. This genetic sexing method is discussed in relation to its use in the genetic control of insects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275770
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  • 5
    Electronic Resource
    Electronic Resource
    Translocations induced by fast neutrons and X-rays in Delia antiqua (1981)
    Springer
    Theoretical and applied genetics 59 (1981), S. 307-312 
    Details
    ISSN: 1432-2242
    Keywords: Translocations ; X-radiation ; Asymmetrical exchanges ; Sib-crossing ; Delia antiqua
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A comparison was made using X-rays and fast neutrons for the induction of translocations in Delia antiqua. Using the same radiation dose, no difference in efficiency between the two radiation types could be observed. However, with fast neutrons many multiple translocations were induced, including a quadruple translocation involving 4 out of 5 autosomes. One male linked translocation was also induced. The reciprocal translocations were assigned into two classes: symmetrical and asymmetrical, and ten of the latter were chosen for inbreeding to produce homozygotes. Asymmetrical exchanges were chosen so that translocation homozygotes could be differentiated cytologically from the normal karyotype. In seven different translocations, homozygous larvae were observed, but often at a low frequency. In four of these lines, viable adult homozygotes were observed. Subsequent random sib-crossing failed to produce a homozygous line.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00264983
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  • 6
    Electronic Resource
    Electronic Resource
    Gamma radiation and insemination in the codling moth, Laspeyresia pomonella (Lepidoptera: Olethreutidae) (1974)
    Springer
    Entomologia experimentalis et applicata 17 (1974), S. 425-432 
    Details
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Des mâles de Carpocapse irradiés à 15 et 35 krads conservent leur aptitude à transférer des spermatophores à des femelles vierges, mais leur pouvoir fécondant est réduit de façon significative, bien qu'on n'observe aucune différence dans la quantité de sperme présent dans la spermathèque des femelles, par comparaison avec des accouplements avec mâles normaux. Les femelles fécondées par des mâles irradiés déposent moins d'œufs que les femelles témoins. La durée du temps écoulé entre l'irradiation et l'accouplement n'affecte pas le taux de fécondation, mais le pourcntage d'éclosion des oeufs s'accroît avec l'allongement de cette période de post-irradiation.
    Notes: Abstract Irradiated (15 and 35 krad) and nonirradiated male codling moths did not differ in their ability to transfer spermatophores when caged with nonirradiated virgin females. However, irradiation significantly reduced the inseminating ability of the treated males as determined by the presence of sperm in the spermathecae of the females. The females inseminated by the irradiated males oviposited significantly fewer eggs than the females inseminated by the nonirradiated males. No differences were found in the quantity of sperm present in the spermathecae. The length of the period of time between irradiation and mating (the post-irradiation period) did not affect the insemination rate but the percentage egg-hatchability did show an increase with the length of this period.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00334987
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  • 7
    Electronic Resource
    Electronic Resource
    Mating success of differently sized onion flies, Delia antiqua (1981)
    Springer
    Entomologia experimentalis et applicata 30 (1981), S. 101-105 
    Details
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé On obtient des pupes de Delia (Hylemya) antiqua de différentes tailles en raccourcissant la durée de la période d'alimentation larvaire. En fonction de la taille, 16 classes ont été constituées et des accouplements entre différentes classes d'adultes ont été pratiqués avec estimation de divers paramètres. La taille n'affecte ni le succès sexuel, ni la viabilité des æufs, ni la survie des mâles. Cependant, les plus grosses femelles produisent le plus grand nombre d'æufs et le taux de ponte est lié directement à la taille des femelles. La taille des mâles n'a d'effet sur aucun de ces paramètres. Les résultats sont examinés en fonction de la valeur des souches de laboratoire et on en déduit que la taille des pupes seule n'est pas un critère suffisant pour faire des prédictions valables sur la compétitivité.
    Notes: Abstract By shortening the larval feeding period, differently sized pupae of the onion fly, Delia (= Hylemya) antiqua Meigen were produced. They were divided into five size classes and the emerged adults were mated in many combinations and various parameters were assessed. Size did not affect mating success, egg hatchability or male survival. However, larger females produced a greater number of eggs and the oviposition rate was positively correlated with female size. Male size had no effect on any of these parameters. The results are discussed in the framework of quality of laboratory strains and it is suggested that pupal size alone is not sufficient to enable predictions to be made concerning competitiveness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00300872
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  • 8
    Electronic Resource
    Electronic Resource
    Onion conditioning pertaining to larval preference, survival and rate of development in Delia (=Hylemya) antiqua (1978)
    Springer
    Entomologia experimentalis et applicata 23 (1978), S. 279-286 
    Details
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Der Effekt von konditionierten und frischen Zwiebeln auf die Präferenz von Larven von Delia antiqua wurde untersucht. Dazu wurden Zwiebeln verwendet, welche während vier verschiedenen Zeitperioden von Larven konditioniert worden waren, ferner Larven von vier verschiedenen Altersstufen. Von den sechszehn getesteten Kombinationen zeigten neun Larvengruppen eine Präferenz für konditionierte Zwiebeln, fünf zeigten keine Präferenz und zwei eine Präferenz für frische Zwiebeln. Dabei waren es gesichert die älteren Larven, welche frische Zwiebeln vorzogen. Ferner wurde die Entwicklungsdauer der Larven signifikant verkürzt durch den Zusatz eines Larvenmazerats zu frischen Zwiebeln vor der Infektion durch Erstlarven. Mit Hilfe dieser Daten und von Literaturangaben wird ein Scenario des Zusammenspiels von Larvenpräferenz und Zwiebelschäden im Feld beschrieben.
    Notes: Abstract Using onion conditioned by Delia (=Hylemya) antiqua larvae for four different periods of time and larvae of four different ages, the effect of conditioned or fresh onion on larval preference was studied. It was shown that of the sixteen combinations tested, nine larval groups showed a preference for conditioned onion, five showed no preference and two showed a preference for fresh onion. Significantly, it was the older larvae which preferred the fresh onion. Further, it was demonstrated that the inoculation of a larval macerate to fresh onion prior to the addition of 1st-instar larvae significantly reduced larval developmental time. Using these data and also information from the literature a scenario was constructed of the interaction of larval preference and onion damage in the field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00334163
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  • 9
    Electronic Resource
    Electronic Resource
    Field cage studies with a genetic sexing strain in the Mediterranean fruit fly, Ceratitis capitata (1986)
    Springer
    Entomologia experimentalis et applicata 41 (1986), S. 231-235 
    Details
    ISSN: 1570-7458
    Keywords: genetic sexing ; Ceratitis capitata ; field cages ; competitiveness
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Des expériences en cage en champ ont été réalisées en Italie avec des populations naturelles de Ceratitis capitata en utilisant une lignée dont le sexage était basé sur le dimorphisme de la couleur des pupes. Les expériences ont été conçues pour contrôler la compétitivité des mâles de cette lignée face aux mâles sauvages, et d'évaluer l'effet du retrait des femelles avant le lâcher sur le pourcentage de femelles sauvages accouplées avec des mâles lâchés. Les expériences montrent que la compétition ne défavorise pas la lignée génétiquement sexable mais révèlent une fréquence élevée d'accouplement intralignée. Le retrait des femelles avant le lâcher modifie radicalement l'orientation des accouplements d'intra vers interlignées. Ce changement accroît fortement l'efficacité de la technique d'utilisation des mâles stériles dans la lutte biologique. On en a conclu que non seulement des intérêts économiques évidents mais aussi des avantages biologiques significatifs seraient retirés de l'intégration de telles lignées sexables génétiquement dans les programmes de lutte avec des mâles stériles.
    Notes: Abstract Using a genetic sexing line based on pupal colour dimorphism in Ceratitis capitata Wied., field cage experiments were carried out with a wild population in Italy. The experiments were designed to monitor the competitiveness of males of this line in comparison with wild males and to assess the effect of removal of females prior to release on the proportion of wild females mated by the released males. The results showed that the genetic sexing strain competed well with the wild population but there was a large degree of intra-strain mating. Removal of females prior to release radically changed the mating pattern from intra to inter-strain mating. This change greatly increases the efficiency of the sterile insect method of control. It was concluded that as well as the obvious economic advantages of genetic sexing, significant biological advantages would also be associated with the integration of such a strain in a sterile insect control programme.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221252
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  • 10
    Electronic Resource
    Electronic Resource
    Induction of alcohol dehydrogenase null mutants in the mediterranean fruit fly Ceratitis capitata (1986)
    Springer
    Biochemical genetics 24 (1986), S. 765-774 
    Details
    ISSN: 1573-4927
    Keywords: Ceratitis capitata ; alcohol dehydrogenase ; null mutants ; genetic sexing ; Y-linked translocations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Alcohol dehydrogenase null mutants have been induced with X rays in Ceratitis capitata, for use in a genetic sexing system. A combination of selective medium and electrophoretic screening was used to identify these mutants. The results indicate that they are probably large deletions since no homozygotes were found for any of the induced mutants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00499008
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