Oogenesis and Radiosensitivity in Cochliomyia Hominivorax (Diptera: Calliphoridae)

Lachance, Leo E.; Bruns, Sarah B.

doi:10.2307/1539569

Cited by 39 publications

(10 citation statements)

References 11 publications

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“…The meiotic events in the E. sorbillans oocyte are quite similar to those of Lucilia cuprina (Beattie & Cheney 1979) and C. hominivorax (LaChance & Bruns 1963a). The process of oocyte development in E. sorbillans is similar to that of D. melanogaster (King et al 1956) and in M. domestica (Goodman et al 1968).…”

Section: Discussionmentioning

confidence: 63%

Cytological Changes during Oogenesis in Exorista sorbillans (Diptera: Tachinidae)

Puttaraju

Manjunatha

1994

Annals of the Entomological Society of America

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The cytological changes and growth rate of nurse cell nuclei, the oocyte nucleus, and the egg chamber during 14 stages of egg development in E. sorbillans Wiedemann are described. Stages 1-3 are mitotically active, resulting in the formation of one oocyte and 15 nurse cells. The visible nonbanded polytene chromosomes are formed at stage 3 in 32n nuclei of smaller nurse cells and 64n nuclei of larger nurse cells. The larger nurse cell nuclei attain a maximal ploidy of 1024n at stage 10. Soon after disintegration of the polytene chromosomes, the nurse cells at stage 6 synthesize the nuclear proteins and transfer them to the developing oocyte, which grows rapidly from stages 11 to 13. At stages 13 and 14, the nurse cells disintegrate and the oocyte matures with chorion, aeropyles, operculum, micropyle, and hatching pleat. At the end of stage 14, the matured oocyte has enlarged to 137,651.92 times that of the oogonium. The results are compared with those from allied species.

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Section: Discussionmentioning

confidence: 63%

Cytological Changes during Oogenesis in Exorista sorbillans (Diptera: Tachinidae)

Puttaraju

Manjunatha

1994

Annals of the Entomological Society of America

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“…The number of eggs laid by irradiated females mated with non-irradiated males was significantly reduced as compared to the control. This reduction may be due to the radiation damage to oogonia, which in turn prevented the formation of egg follicles and, Chance & Bruns (1963) reported that in the case of screw worm fly, gamma radiation not only slowed down the growth rate of the ovary but also produced cytopathological changes in developing egg follicles which resulted in reduction of egg production. The observations on fertility showed that there was a progressive decrease in per cent egg hatch with the increasing dose in both the sexes (Table II).…”

Section: Resultsmentioning

confidence: 99%

REPRODUCTIVE BIOLOGY AND RADIATION STERILIZATION OF THE SUGARCANE TOP BORER, TRYPORYZA NIVELLA

Ashraf¹,

Anwar²,

NajeebUllah³

et al. 1974

Entomologia Exp Applicata

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Reproductive biology and gamma sterilization of the sugarcane top borer, Tryporyza nivella F., were investigated under laboratory conditions. Mating took place on the night of emergence of the moths. Females were found to mate only once. One male mated for a maximum of four times when confined with five females. The mating frequency was maximum between 23.00 and 00.30 hr; the mating duration ranged from 60–165 min with an average of 127.5 min. On average 113 eggs were laid by a mated female and 40 by a virgin female during the total life‐span. The males and females had an average life‐span of 2.6 days and 2.4 days, respectively. Radiation had no adverse effect on emergence, mating, and longevity of the adults. The males were completely sterilized at 15 kR and the females at 10 kR. Zusammenfassung FORTPFLANZUNGSBIOLOGIE UND BESTRAHLUNGSSTERILISATION BEIM WEISSEN ZUCKERROHRBOHRER, TRYPORYZA NIVELLA Fortpflanzungsbiologie und Gamma‐Bestrahlung von Tryporyza nivella wurde unter Laborbedingungen untersucht. Paarung fand in der Nacht des Schlüpfens der Falter statt. Weibchen paarten sich nur einmal. Ein Männchen paarte sich maximal viermal, wenn es mit 5 Weibchen zusammen gebracht wurde. Maximum der Paarungshäufigkeit lag zwischen 23.00 und 00.30 Uhr, die Paarung dauerte 60–165 min, durchschnittlich 127,5 min. Durchschnittlich wurden 113 Eier je gepaartes, 40 je jungfräuliches Weibchen gelegt. Lebensdauer der Männchen durchschnittlich 2,6, die der Weibchen 2,4 Tage. Bestrahlung hatte keinen nachteiligen Effekt auf Schlüpfen, Paarung und Lebensdauer der Adulten. Die Männchen waren vollständig steril bei 15 kR, die Weibchen bei 10 kR.

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“…Dey & Manna (1983) found that the chromosomes of the bug Physopelta schlanbuschi were more sensitive to X rays at the spermatogonial metaphase and anaphase I. The sensitivity of the mitotically active reproductive cells in female insects can be increased by the presence of nurse cells, which possesses polytene chromosomes with huge nucleus of unraveled chromatin when undergoing endomitosis (LaChance & Leverich, 1962;LaChance & Bruns, 1963). Thus, female insects are, in general, more radiosensitive than males (Bakri et al, 2005;Hooper, 1989).…”

Section: Mode Of Action Of Radiation In Insectsmentioning

confidence: 99%

Use of Radiation and Isotopes in Insects

Mastrangelo¹,

Walder²

2011

Radioisotopes - Applications in Bio-Medical Science

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Oogenesis and Radiosensitivity in Cochliomyia Hominivorax (Diptera: Calliphoridae)

Cited by 39 publications

References 11 publications

Cytological Changes during Oogenesis in Exorista sorbillans (Diptera: Tachinidae)

Cytological Changes during Oogenesis in Exorista sorbillans (Diptera: Tachinidae)

REPRODUCTIVE BIOLOGY AND RADIATION STERILIZATION OF THE SUGARCANE TOP BORER, TRYPORYZA NIVELLA

Use of Radiation and Isotopes in Insects

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