Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 525386
Title De reductiedeeling bij eenige Triticum-soorten
Author(s) Mol, W. de
Source University. Promotor(en): J.A. Honing. - 's-Gravenhage : Martinus Nijhoff - 50
Publication type Dissertation, internally prepared
Publication year 1924
Keyword(s) triticum aestivum - tarwe - genetica - celdeling - meiose - cum laude - wheat - genetics - cell division - meiosis
Categories Wheat / Plant Cell Biology
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.
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