[No abstract submitted] / Science, Faculty of / Botany, Department of / Zoology, Department of / Graduate

One of the phenomena uncovered in cytological studies of Abies grandis LIndley, the Lowland White Fir, was the existence of pairing of chromosomes in somatic cells of the very young ovules. Huskins (1948) has shown that somatic pairing is not rare in the plant world, but is seldom properly recorded. It was thought necessary to undertake a study of the morphology of the Individual chromosomes of the tree. Counts and measurements were made on the chromosomes in several cells, and the measurements reduced to a percentage of the total chromosome length in the cell. Positions of the spindle-fibre attachments or centromeres were also tentatively located and recorded as percentages. The lengths of the twelve chromosomes in the genome are as follows: Chromosome 1, 14.4% units long; 2, 11.3% units; 3, 10.6% units; 4, 9.6% units; 5, 9.1% units; 6, 8.4% units; 7, 8.1% units; 8, 1.2% units; 9, 6.4% units; 10, 6.1% units; 11, 5.5% units; 12, 3.3% units. Two chromosomes have club-shaped ends without any constriction, while five have single terminal knobs. One has three constrictions, one has two, and four have but a single constriction. One chromosome is dicentric, four are approximately isomeral, five are distinctly heteromeral, and two have terminal centromeres. Somatic cells from young ovules showing apparent pairing of chromatin strands at early anaphase were examined. In one cell studied, the pairing is so distinct and the similarity between chromatin threads so striking that It is thought to be indication of some sort of reduced meiosis. The differences between somatic pairing and true meiosis are discussed and also some theories on the reason for somatic pairing. Some problems in technique of conifer cytology and the methods used in this study are set forth. / Science, Faculty of / Botany, Department of / Graduate

Thesis (M.S.)--Oregon State University, 1988. / Typescript (photocopy). Includes bibliographical references (leaves 35-41). Also available on the World Wide Web.

Graduation date: 1952

Thesis (M.S.)--Oregon State University, 1993. / Typescript (photocopy). Includes bibliographical references. Also available on the World Wide Web.

No description available.

Graduation date: 1989

Thesis (M.S.)--Oregon State University, 1995. / Typescript (photocopy). Includes bibliographical references (leaves 79-82). Also available on the World Wide Web.

Thesis (M.S.)--Oregon State University, 2003. / Typescript (photocopy). Includes bibliographical references. Also available on the World Wide Web.

Grand fir (Abies grandis /Douglas ex D. Don/ Lindl.) is a species with potential benefits for the implementation of many functions in forest management: namely the function of production, soil improvement, stabilization and landscaping. It was introduced to the Czech Republic, as well as to other European countries, since the first half of the 19th century, mainly by aristocratic families. First plantings were performed in the parks, but gradually also in the forest stands. Another wave of interest in this tree species was associated with the decline of the domestic silver fir (Abies alba Mill.). It was to some extent substitute, for this period comes the greatest number of plantations in the country. The aim of this thesis is, therefore, monitoring of growth and production of the grand fir, but also the evaluation of the effects on the basic characteristics of the soil chemistry, nutrient dynamics and possible degradation effect on forest lands. Research areas were mainly located in the University Forest Enterprise Kostelec nad Černými lesy, but also in other places such as Hrubá Skála at Turnov, forests owned by Kinský at Žďár nad Sázavou and Kynšperk nad Ohří. Monitoring was carried out on already established and monitored middle-aged permanent plots (35 to 55 years), which were assessed at mensurational parameters (position, height, diameter at breast height, ratio of the green crown), in further the quantity and quality of forest floor and upper mineral soil components was studied. This work also contains the measurements of the provenance plot of Forestry and Game Management Research Institute. The results show that the grand fir is a productive tree species that exceeds the stock of domestic conifer tree species and its intensive growth is comparable with Douglas fir. From the perspective of provenance trials is crucial the correct choice of provenance, which achieves better yields and quality of wood. Best provenances come from the island Vancouver and the coast of Washington state. At the soil analysis reaching grand fir better values in comparison with Norway spruce and got it closer to the values of broad-leaved tree species. Thus it can be said that grand fir represents important soil-improving and stabilization tree species.