Library Catalogue

Library Catalogue

  • external user (warningwarning)
  • Log in as
  • About the Catalogue

    Union Catalogue of Agricultural Libraries in the Netherlands

    The WUR Library Catalogue contains bibliographic data on books and periodicals held by the libraries of Wageningen University and Research Centre and some 15 associated libraries. Holding data are added to each record.

    Subjects covered include Agrotechnology, Food and Food Production, Plant and Animal Sciences, Soil Science, Geo-information, Landscape and Spatial Planning, Water and Climate, Ecosystem Studies, Economics and Society.

    The joint collections of the participating libraries cover a substantial part of the internationally available scientific literature in these disciplines.

    As far as Dutch scientific literature in these fields is concerned, coverage can be considered near 100%, including much of the so-called "grey literature".

    All titles are entered in their original language. Keywords are added to facilitate subject searching.

    The database is updated every day and now contains over 830.000 records.

Record number 104109
Title Chromosal rearrangements in the onion fly Hylemya antiqua (Meigen), induced and isolated for genetic insect control purposes : studies on cytogenetics and fertility, with emphasis on an X-linked translocation
show extra info.
[door] C. van Heemert
Author(s) Heemert, C. van
Publisher Wageningen : [s.n.]
Publication year 1975
Description 83 p.
Notes Proefschrift Wageningen
Tutors Sybenga, Prof. Dr. Ir. J.
Graduation date 1975-03-27
Dissertation no. 617
Author abstract show abstract
The aim of this investigation was to isolate structural chromosome mutations causing "semi"-sterility which can be used for genetic control of the onion fly Hylemya antiqua (Meigen). For the induction, X-rays or fast neutrons were applied in different doses on males and females. "Semi"-sterile families were screened cytologically for translocations and inversions. It appeared that high doses 0.5 krad of X-rays) tended to yield complex rearrangements which present difficulties in practical programs, in addition to the useful less complicated rearrangements. They also produce more genetic background damage than lower doses (0-5 krad), which still yield acceptable numbers of uncomplicated rearrangements and therefore are advised for a genetic control program. Because of strongly reduced fecundity of irradiated females these are less suitable for induction of rearrangements than males, although older females because of higher fecundity give better results than young females. Fast neutrons on young males were useful and a low dose of 0.25 krad appeared to be as good as 1.0 krad.

Seventeen different translocations and two pericentric inversions were observed. Most "breakpoints" are located on the longer chromosome arms. Inversion heterozygous males were as fertile as the control which confirms their achiasmate meiosis. Eight translocation stocks were sibcrossed. In five of these, translocation homozygotes were found as larvae and in three out of these five even as adults. The occurrence of duplication/deficiency (from adjacent I orientation) larvae in the five stocks mentioned was remarkable.

From experiments with an X-linked translocation it was concluded that the acrocentric chromosomes are the sex-chromosomes. The alternate and adjacent I orientation frequencies in translocation heterozygotes (X-linked) were shown to be equal in each sex, while no adjacent II was found. In this translocation meiotic numerical non- disjunction occurred in 18.7% of the tranlocation heterozygous females but in 2.0% of the males. This difference is probably a consequence of the difference in meiotic behaviour between the sexes. A good relationship was found between the degree of chromosomal unbalance and the frequency of late embryonic lethals (brown eggs) which was used as a graduator in the selection for "semi"-sterility.

Adult fertile translocation trisomics and adult sterile tertiary trisomics were obtained (both sexes) after meiotic numerical non- disjunction. In translocation trisomic males the X-, Y- and translocated (extra) X-chromosome were shown to disjoin at random. In females the two normal X-chromosomes almost (95%) preferentially disjoin, while the translocated X-chromosome goes to either one of the poles. Primary trisomic males (XXY) and females (XXX) were obtained from testcrossed translocation trisomic parents. XXY males produced four types of gametes XY, X, Y and XX in equal numbers. XXX females only gave XX and X gametes in an equal number. Succesfull attempts to obtain homozygotes for this X-linked translocation are reported. The theoretical background of genetic insect control is discussed.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08200,617
FORUM ; STACKS ; NN08202,617
Keyword(s) (cab) agromyzidae / anthomyiidae / breeds / calliphoridae / drosophilidae / genetic control / genetic variation / glossinidae / inheritance / insects / muscidae / races / sterile insect release / sterilization / tachinidae / tephritidae / schizophora
Categories Agricultural Entomology / Plant and Crop Protection (General)
Publication type PhD thesis
Language English
There are no comments yet. You can post the first one!
Post a comment

To support researchers to publish their research Open Access, deals have been negotiated with various publishers. Depending on the deal, a discount is provided for the author on the Article Processing Charges that need to be paid by the author to publish an article Open Access. A discount of 100% means that (after approval) the author does not have to pay Article Processing Charges.

For the approval of an Open Access deal for an article, the corresponding author of this article must be affiliated with Wageningen University & Research.

Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.