C. A. Krug
Articles written in Journal of Genetics
Volume 34 Issue 3 June 1937 pp 399-414
1. In form of a table a résumé is given on chromosome numbers in representatives of the genus
2. The main morphological characters of these two polyploids are described briefly.
3. Meiosis, gametic sterility and seed setting in these polyploids are discussed; meiotic behaviour is abnormal and normal seed set is very scanty in both forms.
4. Chromosome counts at meiosis and the results of selfing and crossing the
5. Octoploid plants often arise by somatic chromosome doubling and a few instances of vegetative reversions of octoploids to the tetraploid condition were observed (somatic chromosome reduction).
6. Chromosome counts at meiosis of hexaploids and in root-tips of their progeny showed that the functional gametes of these polyploids have usually 33 chromosomes.
7. The influence of disharmonious chromosome combinations at fertilization on perisperm formation is pointed out.
Volume 37 Issue 1 December 1938 pp 41-50
1. A general outline is given of the work on the genetics of
2. The occurrence of a dwarf type of coffee is described, found in progenies of
3. Selfing a number of
4. Individuals of the
7. To obtain pure
8. The genes
Volume 39 Issue 2 January 1940 pp 189-203
1. A short description is given of the main morphological characters of two interspecific triploid hybrids (
2. The meiotic behaviour of the chromosomes at microsporogenesis is given in detail; the expected abnormalities were observed at the distribution of the chromosomes at first and second divisions, resulting in the formation of sterile pollen grains which are extremely variable in size.
3. The megasporogenesis in this triploid is believed to show the same abnormalities as observed in microsporogenesis.
4. The sterility of some interspecific hybrids grown in Java, as suggested in previous articles, is therefore confirmed and cleared up.
5. The intimate pairing of some chromosomes at early prophase up to metaphase suggests the possible autotetraploid origin of
6. The occasional association of a third chromosome at prophase and metaphase to groups of two suggests that some of the
7. Two progeny plants of a triploid, obtained from open pollinated flowers, revealed to have 2
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