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Page 44 · DO #959 · 319_Love_Bx1FF4r
- Collection
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Áskell Löve (1916–1994) papers
- Item/Folder
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"Seminars", 1957–1971, n.d.
- Digital Object
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DO #959,
page 44
- Collection-level dates
- 1950–1987
Page transcription
Seminar
Department of Botany,
University of Minnesota,
Minneapolis.
April 27, 1970.
Askel Løve:
POLYPLOIDY AND DISTRIBUTION
Chromosome number investigations started the year 1882, when the German botanist Strasburger and the French botanist Guignard published observations which seemed to indicate that a species of plants is characterized by a single chromosome number which occurs in all its somatic cells. Twenty-five years and several hundred studies later, it was shown, by the German botanist Roth, that in the genus Rumex chromosome numbers which are multiples of a single basic number form a series from one species to another. About that time, numerous embryologists and cytologists in various parts of America had also started to count chromosomes in plants, but the center of such investigations remained in northern Europe, where the Danish geneticist Winge summarized, in 1917, the then existing knowledge concerning chromosome numbers and came to the conclusion that a comparative study of this subject would result in important contributions to systematics and phylogeny. Around that time, the German cytologist Tischler published the first review of known chromosome number, and his chromosome list was later followed by several others that made closer comparisons of groups from various regions possible. About half a decade later, the Swedish botanist Täckholm, who made a classical cytological and embryological study of the remarkably complicated genus Rose, pointed out
