Anomalous chromosome behaviour in the germ line of Schistocerca gregaria

John, Bernard; Naylor, Beryl

doi:10.1038/hdy.1961.21

Cited by 49 publications

(12 citation statements)

References 16 publications

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“…The normal karyotype of this species has already been described in detail by John and Naylor (1961). It possesses 23 acrocentric chromosomes-i r pairs of autosomes and an allocyclic sex univalent.…”

Section: Introductionmentioning

confidence: 99%

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Temperature and chiasma formation in Schistocerca gregaria

Henderson

1963

Heredity

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Section: Introductionmentioning

confidence: 99%

“…They were derived from a relatively inbred culture, started in 1946, further details of which are provided by John and Naylor (1961).…”

Section: Materials and Experimental Techniquementioning

confidence: 99%

Temperature and chiasma formation in Schistocerca gregaria

Henderson

1963

Heredity

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“…Comparable situations have been reported in single cells of Schistocerca gregaria (John and Naylor, 1961) and Pholidoptera griseoaptera (Henderson, 1961). Single follicle analysis reveals the interesting fact that individual follicles are homogeneous in their chromosome constitutions.…”

Section: Sosmentioning

confidence: 87%

A tetrasomic mosaic in the germ line of Chorthippus parallelus

Hewitt

1963

Heredity

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“…The locusts used were inbred in the Genetics Department, Cambridge, using predominantly sib matings, from previously inbred material kindly supplied by the Anti-Locust Research Centre, London (see John and Naylor, 1961, for details of this culture). They were reared in a diurnally fluctuating temperature of approximately 25°C night and 30°C day, with an automatically controlled photoperiod of 10 hours.…”

Section: Methodsmentioning

confidence: 99%

Four effects of elevated temperature on chiasma formation in the locust Schistocerca gregaria

Henderson

1988

Heredity

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Using an inbred stock of Schistocerca gregaria in which inter-individual variation was reduced, the effects of high temperature treatments on male meiosis have been investigated. These experiments involved both heat-treatments of relatively short duration, ranging from 1-6 days at 40°C followed by a return to 30°C, and longer periods of time at a constant 40°C. It was found that four effects on chiasma frequency could be produced. In addition to the major reduction in chiasma frequency reported earlier, a second small period of reduction was obtained. The other two effects involved increases in chiasma frequency. Three of these effects, the two decreases and one increase, were produced following heat-treatments of meiotic prophase stages, after premeiotic DNA synthesis was completed. The other increase was obtained following heat-treatment of spermatogonia. The possible nature of these effects is discussed. It is suggested that the late prophase period, during which a small increase in chiasma frequency (called Effect 1) is produced by heat-treatments, could correspond to at least part of the time during which chiasmata form.

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Anomalous chromosome behaviour in the germ line of Schistocerca gregaria

Cited by 49 publications

References 16 publications

Temperature and chiasma formation in Schistocerca gregaria

Temperature and chiasma formation in Schistocerca gregaria

A tetrasomic mosaic in the germ line of Chorthippus parallelus

Four effects of elevated temperature on chiasma formation in the locust Schistocerca gregaria

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