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drought adaptation

Catalogue: GRDC Research Summaries
The pre-breeding component will involve physiological characterization of elite germplasm from Australia and CIMMYT as well as genetic resources (synthetic & landraces) to design better targeted crosses... In accordance with recent recommendations (Australian Winter Cereals Workshop- Breeding for Better Performance Under Drought, ANU, 5-6 Sept 2007) work will focus on (i) traits that are unconstrained by yield penalties in wetter years; (ii) drought response under a range of 'water balances'; (iii) identifying germplasm with the ability to extract subsoil water; and, (iv) phenotyping in realistic environments... The first wave of physiological crosses (crosses based on physiological parameters) made at the International Maize and Wheat Improvement Center (CIMMYT) and targeted to drought gave twice as many superior yielding lines under drought than the crosses based solely on yield information...
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Catalogue: Ground Cover
Scientists share keys to drought tolerance Some of the world's leading crop researchers met in Adelaide recently to discuss breeding strategies for increasing plants' water-use efficiency By Gio Braidotti With global grain stocks at their lowest levels in decades and water stress accounting for a glaring proportion of global shortfalls, the 2007 Genomics Symposium in Adelaide allowed some of the world's best drought-tolerance pre-breeders to put their heads together on new ways to test, select and dissect traits that can maintain yields under drought... Overall, genomics is currently playing a more peripheral role in the work of conventional pre-breeders, with scientists attempting to dissect the genetic basis of drought tolerance and map traits to discrete chromosomal subregions (called QTLs or quantitative trait loci)... The number of GM field-trials is on the rise...
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Catalogue: GRDC Final Reports
The program of research for this Chair in Crop Science focused on novel integrated systems modelling approaches for grain crop improvement... Experiments have been conducted in the new lysimetry platform to explore the physiology and genetics of key drought adaptive traits, such as transpiration efficiency and carbohydrate partitioning among organs... Chenu, K., Chapman, S.C., Tardieu, F., McLean, G., Welcker, C., and Hammer, G.L. (2009) Simulating the yield impacts of organ-level quantitative trait loci associated with drought response in maize - A "gene-to-phenotype" modeling approach...
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