The species complex, Waitea circinata (WC) has been currently divided into five cultural types: var. circinata, var. oryzae, var. zeae, var. agrostis, and var. prodigus. These divisions are currently based on differences in their sclerotial morphology which have been supported by differences in their internal transcribed spacer region. Physiological differences such as optimal growth temperature, and morphological and pathogenic analyses as well as molecular biological techniques, were used to examine a broad WC collection coming from different geographic regions, and different susceptible hosts. The pathogenic examination showed that WC varieties are not host specific and can successfully infect both turfgrasses and cereals. Phylogenetic trees based on Neighbor-joining (NJ) and Maximum likelihood (ML) methods for three genomic regions (ITS, beta-tubulin, IGS1) showed support for only three of the five WC cultural types that have been described, namely Waitea circinata var. circinata, var. oryzae and var. zeae." / Waitea circinata varieties were characterized using molecular, morphological, physiological and pathological techniques. / Ontario Turfgrass Research Foundation, CONACYT (Ministry of Science from Mexico)
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:OGU.10214/3034 |
| Date | 19 September 2011 |
| Creators | de la Cerda, Karla Adriana |
| Contributors | Hsiang, Tom, Thorn, Greg |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Thesis |
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