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https://hdl.handle.net/1959.11/637
Title: | Differential responses to selection for aluminium stress tolerance in triticale | Contributor(s): | Zhang, XG (author); Jessop, RS (author); Ellison, F (author) | Publication Date: | 2002 | DOI: | 10.1071/AR01187 | Handle Link: | https://hdl.handle.net/1959.11/637 | Abstract: | A directional selection program was initiated to select triticale genotypes with improved aluminium (Al) tolerance and presumably acid-stress tolerance. Two consecutive cycles of 2-way selection for either high or low apparent Al tolerances from a base population, Tahara, resulted in the production of 6 selected lines, whose progenies were tested for Al tolerance response in terms of root regrowth characteristics in nutrient solutions to assess selection effectiveness. In addition, 1 cycle of 2-way selection from 2 other base populations, Empat and 19th ITSN 70-4, resulted in 4 selected lines.Selective responses differed among selected lines, depending largely on the direction of the selection made and, to a lesser extent, on the genetic background of the original population. Upward selection for longer root regrowth produced progeny with more highly Al-tolerant plants. Although varying estimates of realised heritability were generated, the 2 cycles of upward selection resulted in an enhanced Al tolerance of 14.5% in the progeny A9701 derived from the base population Tahara. These results suggest that directional selection based on longer root regrowth in nutrient solutions was effective in improving Al tolerance. A pot-culture experiment showed that the second selection generation (S2) Al-tolerant lines were more productive than their moderately Al-tolerant counterparts, further implicating the effectiveness of directional selection in enhancing Al stress tolerance and plant productivity. | Publication Type: | Journal Article | Source of Publication: | Australian Journal of Agricultural Research, 53(12), p. 1295-1303 | Publisher: | CSIRO Publishing | Place of Publication: | Australia | ISSN: | 1444-9838 0004-9409 1836-5795 1836-0947 |
Fields of Research (FoR) 2008: | 070308 Crop and Pasture Protection (Pests, Diseases and Weeds) | Peer Reviewed: | Yes | HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
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Appears in Collections: | Journal Article |
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