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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 104407
Title Een onderzoek naar variabiliteit en vererving van het ruw-eiwitgehalte in Engels raaigras
show extra info.
[door] J.W. Lackamp
Author(s) Lackamp, J.W.
Publisher Wageningen : [s.n.]
Publication year 1965
Description 120 p ill
Description 1 online resource (120 p) ill
Notes Proefschrift Wageningen  show all notes
Ook verschenen als: Agricultural research reports; 656
Ook verschenen als handelsuitgave
ISBN 9022001172
Tutors Hart, Prof. Ir. M.L. 't
Graduation date 1965-06-11
Dissertation no. 385
Author abstract show abstract
Raising the protein content by breeding of grasses forms a contribution to raising grass quality (in which digestible protein is a valuable nutrient).

A strong correlation proved to exist between time of heading and chemical composition. Protein content as a qualitative property was much influenced by environmental conditions.

A theory of Schwarze and Schwanitz based on physiological considerations existed that selection for higher protein content, combined with high protein yield, should be performed only under such environmental conditions that this combination is physiologically possible.

Genetic differences in protein content among plants with the same physiological rhythm were found. These differences showed a clear interaction with environment. They were heritable. The reaction of genotype on environment was also heritable. Phenotypic variability of a certain genotype was enormous. It many times exceeded differences between genotypes, even if these were extremes. Behind the phenotypic negative correlation between protein and carbohydrates there seemed to be a negative genotypic correlation.

Many protein rich genotypes were less productive and less vigorous.

Cumulative selection was not hopeful.

The theory of Schwarze and Schwanitz based on the theoretical physiological observation tested here did not hold.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08200,385
FORUM ; STACKS ; NN08202,385
Keyword(s) (cab) lolium / botany
Categories Grassland Improvement
Publication type PhD thesis
Language Dutch; Flemish
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