Please use this identifier to cite or link to this item:
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:
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
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
Appears in Collections:Journal Article

Files in This Item:
1 files
File SizeFormat 
Show full item record


checked on Jul 6, 2024

Page view(s)

checked on May 26, 2024
Google Media

Google ScholarTM



Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.