INTERACTIONS BETWEEN GENES AND CYTOPLASM IN EPILOBIUM1
This extract was created in the absence of an abstract.
Excerpt
In the following survey of the relations between cytoplasmic units and nuclear genes in Epilobium, I will lay greater stress upon the experimental facts than upon theoretical considerations. For critical judgment of the experiments it will be useful to refer first to some singular characteristics of my object and the methods, and then to give an account of the most important results on plasmic inheritance in Epilobium.
1. Methods
All species and races of Epilobium (willow-herb) of the family Onagraceae have the same diploid chromosome number, 36 (Schwemmle, 1924; Michaelis, 1925), but in experiments I have obtained haploid, tetraploid, and anaploid plants in the most important species and races (Michaelis, 1942a; Kisch, 1941; Douwes, 1948). Doubling of the haploids with colchicin gives plants with high homozygosity.
Cytological investigations are difficult because the chromosomes are alike, small, and not easy to fix. This disadvantage is offset by the fact that pollen...
Footnotes
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↵1 I thank Dr. Gr. HOFFMANN for her help in translating.
