Sökning: "crosses"

Visar resultat 11 - 15 av 96 avhandlingar innehållade ordet crosses.

1. 11. Variation of meiotic recombination frequencies in Neurospora crassa

   Författare :Håkan Cederberg; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : The present investigation was performed in order to examine the genetical and the environmental influence on meiotic recombination frequencies in Neurospora crassa. Lines selected for high and for low recombination frequency in a defined chromosome interval were used. LÄS MER

3. 12. Development and Evaluation of Web Applications for Investigating Candidate Genes in Rat Models of Complex Diseases

   Författare :Lars Andersson; Göteborgs universitet; []
   Nyckelord :rat; complex disease; rheumatoid arthritis; type 2 diabetes mellitus; QTL; candidate genes; web application; text mining;

   Sammanfattning : Many human diseases, such as rheumatoid arthritis and type 2 diabetes mellitus, have a very complex development, depending on both environmental and multiple genetic factors. By crossing inbred rat strains susceptible to a genetic disorder with strains resistant to the same disorder, genomic regions associated with the disease can be identified, so called quantitative trait loci (QTLs). LÄS MER

4. 13. Breeding System Evolution and Pollination Success in the Wind-Pollinated Herb Plantago maritima

   Författare :Emil Nilsson; Jon Ågren; Pia Mutikainen; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; Breeding system; mating system; gynodioecy; male sterility; reproductive output; self-compatibility; self-incompatibility; wind-pollination; founder event; genetic structure; Biologi; Biology; Biologi; ekologisk botanik; Ecological Botany;

   Sammanfattning : In this thesis, I examined variation in sex expression and mating patterns in the sexually polymorphic, wind-pollinated herb Plantago maritima. With a combination of field studies, greenhouse experiments, and genetic analyses, I (a) examined factors influencing sex ratio variation in gynodioecious plants (in which hermaphrodites and females coexist), (b) discovered variation in breeding system, (c) investigated density-dependence of seed production, and (d) documented genetic variation within and among populations close to the northern range margin in Europe. LÄS MER

5. 14. Ringkors från Gotlands medeltid

   Författare :Joanna Wolska; Helena Edgren; Stockholms universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Art; Konstvetenskap;

   Sammanfattning : This dissertation examines the monumental wooden roods which can be found in many of Gotlandis chur ches, and on which the body of Christ is surrounded by a glory in the shape of a ring or a solid disc. This type of triumphal cross occurred in Gotland between the beginning of the 13th and the middle of the 15th centuries. LÄS MER

7. 15. Genetic Analysis of Cytosolic PGI in Festuca ovina

   Författare :Lena Ghatnekar; MEMEG; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Växtgenetik; Plant genetics; pseudogenes; grasses; cytosolic PGI; introgression; duplication; Festuca ovina;

   Sammanfattning : Festuca ovina, sheep's fescue is a widely distributed perennial outbreeder that belongs to the grass family Poaceae and is very common in the northern temperate zone. The genus Festuca s.l. is partitioned into fine-leaved fescues to which F. LÄS MER