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https://hdl.handle.net/2440/34618
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Type: | Journal article |
Title: | Use of triticum tauschii to improve yield of wheat in low-yielding environments |
Author: | Gororo, N. Eagles, H. Eastwood, R. Nicolas, M. Flood, R. |
Citation: | Euphytica: international journal on plant breeding, 2002; 123(2):241-254 |
Publisher: | Kluwer Academic Publ |
Issue Date: | 2002 |
ISSN: | 0014-2336 |
Statement of Responsibility: | N.N. Gororo, H.A. Eagles, R.F. Eastwood, M.E. Nicolas and R.G. Flood |
Abstract: | Triticum tauschii (Coss.) Schmal. is an ancestor of bread wheat (T. aestivum). This species has been widely used as a source of simply-inherited traits, but there are few reports of yield increases due to introgression of genes from this species. Selections from F₂-derivedlines of backcross derivatives of synthetic hexaploid wheats (T.turgidum / T. tauschii) were evaluated for grain yield in diverse environments in southern Australia. Re-selections were made in the F₆ generation and evaluated for grain yield, yield components including grain weight, and grain growth characters in diverse environments in southern Australia and north-western Mexico. Re-selection was effective in identifying lines which were higher yielding than the recurrent parent, except in full-irrigation environments. Grain yields of the selected derivatives were highest relative to the recurrent parent in the lowest-yielding environments, which experienced terminal moisture deficit and heat stress during grain filling. The yield advantage of the derivativesin these environments was not due to a change in anthesis date orgrain-filling duration, but was manifest as increased rates of grain-filling andlarger grains, indicating that T. tauschii has outstanding potential forimproving wheat for low-yielding, drought-stressed environments. |
Keywords: | Drought grain-filling synthetic hexaploids Triticum tauschii T. turgidum wheat yield |
DOI: | 10.1023/A:1014910000128 |
Published version: | http://dx.doi.org/10.1023/a:1014910000128 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest |
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