Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/61867
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Hybrids of Avena sativa with two diploid wild oats (CIav6956) and (CIav7233) resistant to crown rust |
Author: | Aung, T. Zwer, P. Park, R. Davies, P. Sidhu, P. Dundas, I. |
Citation: | Euphytica: international journal on plant breeding, 2010; 174(2):189-198 |
Publisher: | Kluwer Academic Publ |
Issue Date: | 2010 |
ISSN: | 0014-2336 1573-5060 |
Statement of Responsibility: | Taing Aung, Pamela Zwer, Robert Park, Philip Davies, Parminder Sidhu and Ian Dundas |
Abstract: | Two diploid accessions of wild oat, CIav6956 and CIav7233, were identified as carrying seedling resistance to oat crown rust (caused by Puccinia coronata f. sp. avenae; Pca). Two vigorous interploidy F1 hybrids were generated from crosses involving the hexaploid oat cultivar Wintaroo and the diploid oat Avena strigosa Schreb. accession CIav6956. An additional interploidy F1 hybrid, designated “F1-Aa1”, was produced from a cross of Wintaroo and the diploid oat accession CIav7233. All three hybrids were more vigorous and taller than the cultivated parent Wintaroo. The three F1 hybrids contained full chromosome complements from both parents (2n = 4x = 28), but no seeds were obtained when the three F1 hybrids were selfed. Meiotic analyses of the hybrids indicated that they exhibited a high degree of inter-genome and intra-genome pairing. Trivalent configurations were detected in 95–96% of meiotic cells and a minimum of three bivalents was present in all cells. An average chiasma frequency of 7.2–7.9 per cell was observed for the three F1 hybrids. A fourth F1 hybrid was subsequently generated from a cross between the diploid oat accession CIav7233 and Wintaroo. One octaploid (2n = 8x = 56) was generated from this hybrid and progeny were resistant to two Pca races. The chromosome number of the octaploid progeny varied between 51 and 54 chromosomes. Development of a chromosome addition line(s) with the crown rust resistance should be possible from these partial-octaploids. |
Keywords: | Resistance Partial-octaploids Chromosome pairing Meiosis |
Description: | The original publication is available at www.springerlink.com |
Rights: | © Springer Science+Business Media B.V. 2010 |
DOI: | 10.1007/s10681-009-0111-5 |
Published version: | http://dx.doi.org/10.1007/s10681-009-0111-5 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 5 |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.