Inheritance of cold stress tolerance in grapes
| dc.contributor.author | Esensee, Virgil D., author | |
| dc.contributor.author | Hughes, Harrison G., advisor | |
| dc.contributor.author | Johnson, Duane, committee member | |
| dc.contributor.author | Lee, Chi Won, committee member | |
| dc.contributor.author | Towill, Leigh E., committee member | |
| dc.date.accessioned | 2023-01-27T14:52:41Z | |
| dc.date.available | 2023-01-27T14:52:41Z | |
| dc.date.issued | 1989 | |
| dc.description | Covers not scanned. | |
| dc.description.abstract | Cold hardy 'Valiant' was crossed to the lesser hardy cultivars 'Zinfandel' and 'French Colombard' to produce progeny that were later planted in the field for evaluation. In January and February, 1989, buds with subjacent stem tissue were evaluated by differential thermal analysis (DTA). The results were compared with those obtained from tests of browning that were performed following controlled freezing of buds in a methanol bath. DTA was found to be an accurate means to determine the mean midwinter killing temperature of grape buds. The apparatus used cooled the experimental tissues at a smooth linear rate (-15.8 C/hr) and produced low variances within replicates. An analysis of variance indicated that there were true differences between progeny means. Field evaluations in June, 1989, also verified the midwinter DTA data. These tests substantiate recommending DTA as a breeding tool for evaluating midwinter grape cold hardiness. Broad sense heritability was calculated using grape bud DTA data for both 'Valiant'x'Zinfandel' and 'Valiant'x'French Colombard' crosses. All calculations produced heritabilities near unity, indicating that of the progeny tested, the phenotypes were due primarily to expression of the genotypes. It was also found that poor seed germination commonly found in grapes can be ameliorated through the use of embryo rescue techniques. Data showed that low germination of grape seeds is not necessarily due to inviability, since rescued embryos grew and developed when placed on Nitsch's medium. | |
| dc.format.medium | doctoral dissertations | |
| dc.identifier.uri | https://hdl.handle.net/10217/236131 | |
| dc.language | English | |
| dc.language.iso | eng | |
| dc.publisher | Colorado State University. Libraries | |
| dc.relation | Catalog record number (MMS ID): 991016583119703361 | |
| dc.relation | SB388.E83 1989 | |
| dc.relation.ispartof | 1980-1999 | |
| dc.rights | Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. | |
| dc.subject | Grapes | |
| dc.title | Inheritance of cold stress tolerance in grapes | |
| dc.type | Text | |
| dc.type | StillImage | |
| dcterms.rights.dpla | This Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). | |
| thesis.degree.discipline | Horticulture | |
| thesis.degree.grantor | Colorado State University | |
| thesis.degree.level | Doctoral | |
| thesis.degree.name | Doctor of Philosophy (Ph.D.) |
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