Thesis (Ph. D. in Genetics)--University of California, Davis, Jan. 1953. / Includes bibliographical references (leaves 47-48). Also available via the World Wide Web. (Restricted to UC campuses).

Thesis (Ph. D.)--University of Washington. / Bibliography: l. [150]-153.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1968. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

1. Serial cytological observations were made on one abnormal seedling from the thornless segregants of the F2 progeny from crossing two tetraploid (2n=28) Rubus species. The number of root tip chromosomes was found to vary from 9 to 48 per cells, with the mode always at 35. The wide variation in chromosome number decreased with time, until at one point there was almost stability at 2n=35. 2. The number of satellites per cell was proportional to the number of nuoleoli per cell. Evidence from the number of satellites per cell suggests that different chromosomes were being involved in the different complements. 3. There was a correlation between the chromosome number and corresponding cell sizes within the aneuploid series. 4. Virus infection was not responsible for the variation of somatic chromosome numbers from cell to cell. 'The cause of the instability was not definitely located but it is suggested that its initiation arose from the egg sell as Rubus pollen is sensitive to chromosome unbalance. 5. Chromosome number instability of this plant is discussed in relation to other examples from the same and different genera.

By the end of 1972, a total of thirteen rabbits had been injected. One serum was raised to Brassica oleracea S23S23 kale pollen proteins, but no s-antibody was stimulated. All the others were raised to stigma proteins. A range of s-alleles and varieties of B.oleracea was used including S23S23, S16S16 kale, S2S2, S45S45 and S5S5 brussels sprout and S15S15 cabbage. S15 and S5 were of low dominance, S2 and S45 of intermediate dominance and S23, S14 and S16 of high dominance. S-antibodies were raised to S23 and S16 in kale, and S2 and S45 in brussels sprout. Only the S16-antibody had a high titre of 1/16, the other were 1/4 or less. In two of the cases , booster injections stimulated the S-antibody response where the first course of injections stimulated the S-antibody response where the first course of injections stimulated the S-antibody response where the first course of injections had failed. Relatively dilute stigma extracts of 250 stigmas/ml stimulated most s-antibodies. An injection schedule of more than two months produced cross-reactions or new specificities. Extract which had been frozen or treated with formalin gave a poorer antibody response than freshly-prepared extract. No S-antibodies were stimulated by these treatments. In its present form, the technique was unsuitable for routine S-allele diagnosis in B.oleracea because of the low rate of successful sera and the low titres stimulated. Improvements to the technique are suggested. Between 35 and 40% of the total protein content was lost when a stigma extract was frozen, but the S-protein was not lost. B.oleracea pollen germinated on an agar and sucrose medium. Germination was stimulated by 0.0005% queroetin, but tube growth was not. Querotin was detected as glycosides in the pollen and stigma tissue of B.oleracea. It was not involved in the incompatibility reaction of the stigma.

No description available.

No description available.

Thesis (Ph. D. in Genetics)--University of California, Davis, Sept. 1950. / Includes bibliographical references (leaves 62-64). Also available via the World Wide Web. (Restricted to UC campuses).

Thesis (Ph.D.) -- University of Adelaide, Dept. of Biochemistry, 1980.

Thèse--Geneva. / "Thèse no. 1250." Bibliography: p. 163-188.