Methodology of translocation production and stability of translocations in the Mediterranean fruit fly, <i>Ceratitis capitata</i> Wied. (Dipt., Tephritidae)

Steffens, Rainer

doi:10.1111/j.1439-0418.1983.tb02630.x

Cited by 6 publications

References 17 publications

(9 reference statements)

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Viability and behaviour of translocations that suppress female recombination in the Mediterranean fruit fly, Ceratitis capitata (Wied.)

Busch-Petersen

Pyrek

Ripfel

1987

Theoret. Appl. Genetics

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The viability of a series of recombination suppressor (RS) strains in Ceratitis capitata, all previously found to contain a reciprocal autosomal translocation, was assessed for egg hatchability and adult emergence in both the homozygous and heterozygous state. Except in T 30C, which contains a Y-autosome translocation in addition to the A-A translocation, egg hatch was significantly reduced in all heterozygous translocation strains, and ranged from 42.4% to 58.5% in seeded eggs compared to a control value of 82.8%. Adult emergence from hatched eggs was affected to a lesser extent, but with a range of 59.5% to 84.2%, compared to the control value of 83.1%, remained significantly reduced in 4 of the 6 translocation strains, as well as in the male line of T 30C. In the homozygous configuration all strains, except T 19 and T 109, showed a significant reduction in egg hatchability, whereas adult emergence was not adversely affected. A significant reduction in the egg hatchability of the translocation heterozygotes compared to that of the homozygotes was observed in 5 of the 7 strains, the observed reduction in T 55/109 being non-significant while that of T 30C was significantly increased. The behaviour of translocations as recombination suppressors and their suitability for inclusion in breeding schemes for the isolation of induced recessive mutations is discussed.

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Viability and behaviour of translocations that suppress female recombination in the Mediterranean fruit fly, Ceratitis capitata (Wied.)

Busch-Petersen

Pyrek

Ripfel

1987

Theoret. Appl. Genetics

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Combination of Radiation‐ and Translocation‐induced Sterility for Genetic Control of Fruit Flies

Steffens

1983

Entomologia Exp Applicata

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Substerilizing irradiation doses together with inherited partial sterility due to translocations might be, in the long term, more effective than the Sterile Insect Technique. The “Combi‐Fly” concept proposed here, integrates moderate radiation doses and inherited sterility to achieve actual control and introduce high genetic load in the field. Data on the sterility and quality of Combi‐Flies are reported. ZUSAMMENFASSUNG Kombination von strahlen‐ und translokationsbedingter Sterilität zur genetischen Bekämpfung von Fruchtfliegen Qualitätsprobleme bei sterilisierten Insekten und die Entwicklung neuer genetischer Methoden führten zu einem steigenden Interesse für Alternativen zur konventionellen „Sterile Insekten Technik” (SIT). Bei dem hier vorgeschlagenen „Combi‐Fly Concept” (Ceratitis capitata als Modell‐Fruchtfliege) wird nicht ein voll fertiler Stamm für die Massenzucht verwendet sondern ein Stamm mit einer erblichen Teilsterilität bei allen Männchen in der Größenordnung von 75%. Durch den nachgewiesenen kumulativen Effekt von strahlen‐ und translokationsbedingter Sterilität kann zur Erreichung eines Gesamt‐Sterilitätsgrades von 90–95% die anzuwendende Strahlendosis im Vergleich zu einem Normalstamm erheblich reduziert werden. Die damit verbundene Qualitätsverbesserung bei gleichem, hohen Sterilitätsgrad wurde nachgewiesen und ist ein wesentlicher Vorteil der Methode. Darüberhinaus sind alle männlichen Nachkommen von „Kombi‐Fliegen” erblich teilsteril und tragen so dazu bei, eine bekämpfte Population länger als bei Anwendung der konventionellen SIT unter der ökonomischen Schadensschwelle zu halten. Anwendungsbezogene Aspekte dieses variablen Konzeptes werden diskutiert.

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Genetic and cytological mapping of a "Y–2" translocation in the Mediterranean fruit flyCeratitis capitata

Jl¹,

Ma²

1995

Genome

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In this paper we analyze genetically and cytologically a Y-chromosome 2 translocation with several markers, some of which are potentially useful for large scale sex separation. The breakpoint of this Y-2 translocation is located at region 6B on the trichogene polytene chromosome map. It is found that, in strains carrying this TY-2, only 40% of the fertilized eggs survived to the adult stage, 26% of them dying as embryos, 27% as larvae, and 7% as pupae. Early lethality is explained by the nonviability of adjacent-1 products of meiosis containing a deletion of section 1A-6B. The reciprocal segregation products, carrying this chromosome segment in triplicate, survive until late stages. By analyzing the phenotype of the individuals we conclude that all markers used in this study are located outside the triplicated region and that the male determining factor is not included in the piece of the Y chromosome translocated to chromosome 2. The male recombination frequencies of several genes located on chromosome 2 relative to the breakpoint of translocation T5038 have also been studied here.

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Methodology of translocation production and stability of translocations in the Mediterranean fruit fly, Ceratitis capitata Wied. (Dipt., Tephritidae)

Cited by 6 publications

References 17 publications

Viability and behaviour of translocations that suppress female recombination in the Mediterranean fruit fly, Ceratitis capitata (Wied.)

Viability and behaviour of translocations that suppress female recombination in the Mediterranean fruit fly, Ceratitis capitata (Wied.)

Combination of Radiation‐ and Translocation‐induced Sterility for Genetic Control of Fruit Flies

Genetic and cytological mapping of a "Y–2" translocation in the Mediterranean fruit flyCeratitis capitata

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