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Minichromosomes in Drosophila melanogaster derived from the transposing element TE1
1990 (English)In: Chromosoma, ISSN 0009-5915, E-ISSN 1432-0886, Vol. 99, no 5, p. 336-343Article in journal (Refereed) Published
Abstract [en]

A minichromosome has originated from the transposing element TE1. This autonomously replicating chromosome contains the structural genes white and roughest, from the Drosophila X chromosome. It arose within a stock carrying TE1 at 45F on chromosome 2. In addition to the w and rst genes, the minichromosome may carry section 45C-45F from chromosome 2. It is inherited by 33%-47% of the offspring. By this criterion it carries a centromere, although the origin of the centromere is unknown. From this minichromosome a still smaller one has originated, probably through the loss of all material from chromosome 2 together with some heterochromatin. At the same time a duplication of white and roughest could have taken place. This chromosome has a strange morphology and is more frequently lost in meiosis than the larger one, but is still transmitted to about 29%-37% of the progeny of one parent heterozygous for the minichromosome. In both cases the flies have variegated eyes, probably as a result of position-effect variegation. The variegation pattern is influenced by factors in the X chromosome. The size of the smaller minichromosome is little more than 1 Mb as determined by pulsed field gel electrophoresis.

Place, publisher, year, edition, pages
Springer , 1990. Vol. 99, no 5, p. 336-343
National Category
Health Care Service and Management, Health Policy and Services and Health Economy
Identifiers
URN: urn:nbn:se:hb:diva-7464Local ID: 2320/7601OAI: oai:DiVA.org:hb-7464DiVA, id: diva2:888327
Available from: 2015-12-22 Created: 2015-12-22 Last updated: 2017-12-01Bibliographically approved

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Ståhl, Fredrik

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