Australian Centre for Plant Functional Genomics publications

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Browsing Australian Centre for Plant Functional Genomics publications by Author "Australian Agronomy Conference (13th : 2006 : Perth, Western Australia)"

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    Interspecific hybrid, Zea mays L. x Tripsacum dactyloides L., a new fodder crop with large silage biomass production under abiotic stresses
    (The Regional Institute, 2006) Shavrukov, Y.; Sokolov, V.; Langridge, P.; Tester, M.; Australian Agronomy Conference (13th : 2006 : Perth, Western Australia); Australian Centre for Plant Functional Genomics (ACPFG)
    Interspecific hybrids between maize (Zea mays) and eastern gamagrass (Tripsacum dactyloides) showed different biomass production depending on environment and abiotic stress (salinity, drought and alkalinity). In the plot with a moderate level of salinity (Roseworthy), the silage production of hybrids 1 and 2 was 29.0 and 42.9 tonnes/ha, respectively, which was almost 11- and 16-fold higher than maize production in the same plot. Hybrid plants had a similar nutrient composition of vegetative material, energy, protein content and digestibility for feeding animals compared to that of parental maize. High alkalinity and low soil nutrition (Waite plot) reduced biomass production but hybrids grew at least twice as tall as the maize parent. Hybrids plants also survived at the Meningie plot with a combination of high salinity and strong drought stress.
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    Screening for sodium exclusion in wheat and barley
    (The Regional Institute, 2006) Shavrukov, Y.; Bowne, J.; Langridge, P.; Tester, M.; Australian Agronomy Conference (13th : 2006 : Perth, Western Australia); Australian Centre for Plant Functional Genomics (ACPFG)
    Accessions and cultivars of the genus Triticum (T. monococcum, T. urartu, T. tauschii, T. durum and T. aestivum) and of Hordeum (H. vulgare and H. spontaneum), from different geographical locations, were screened for sodium exclusion. Species from both genera demonstrated a range of differences in Na+ exclusion/accumulation in the shoot. The greatest polymorphism for Na⁺ exclusion was found in T. monococcum accessions, where there was more than 50-fold difference between the lowest excluder and the highest accumulator, while T. durum, showed minimal variability in Na⁺ exclusion, (less than 1.5-fold). These results are important for guiding a strategic choice of parental forms, and reflect the pressure of both natural and artificial selection, as well as on adaptation in both wild accessions and cultivated forms to high salinity environments.