Library Catalogue

Library Catalogue

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    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 104559
Title De reductiedeeling bij eenige Triticum-soorten
show extra info.
door Willem de Mol
Author(s) Mol, W. de
Publisher 's-Gravenhage : Martinus Nijhoff
Publication year 1924
Description 50 p.
Notes Proefschrift Wageningen
Tutors Honing, Prof. Dr. J.A.
Graduation date 1924-06-27
Dissertation no. 11
Author abstract show abstract
Reduction division and haploid chromosome number of several species and varieties of Triticum were studied in haematoxylin-stained microtome sections (16- 18 μ) after Bouin Allen fixation. Five stages of nuclear contraction ('ball') could usually be distinguished: preleptotene, prezygotene, postzygotene, postdiakinesis, postinterkinesis. Pachytene was not clear. A multipolar spindle frequently preceded the normal bipolar one in first prometaphase.

T. monococcum and T. dicoccoides (one variety each) had 7 chromosomes; T. dicoccum, T. turgidum, T. durum, T. polonicum (one variety each) 14; T. vulgare (eight varieties), T. compactum (two varieties), T. spella (one variety) 21. These observations confirm those of Sakamura and of Sax except for T. dicoccoides where Sax found n = 14. The frequent reports of n = 8 must be rejected. Taxonomic classifications from chromosome number agree with those from morphology, sexual affinity, serological and Vavilov methods, except for T. dicoccoides.

Relations between species, and origin were discussed on basis of published information and the present results. Hybridization (e.g. with Aegilops) was considered improbable because of hybrid sterility, but polyploidy must have been an important factor.

Online full textINTERNET
On paper FORUM ; SPEC.COLL. ; QE0422
FORUM ; STACKS ; NN08202,11
Keyword(s) (cab) triticum aestivum / wheat / genetics / cell division / meiosis
Categories Wheat / Plant Cell Biology
Publication type PhD thesis
Language Dutch; Flemish
About cum laude graduation (with distinction)
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