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31 July 2015 Genetic improvement of triticale for irrigated systems in south-eastern Australia: a study of genotype and genotype × environment interactions
Andrew Milgate, Ben Ovenden, Dante Adorada, Chris Lisle, John Lacy, Neil Coombes
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Abstract

Research into winter cereal breeding in Australia has focused primarily on studying the effects of rainfed environments. These studies typically show large genotype × environment (GE) interactions, and the complexity of these interactions acts as an impediment to the efficient selection of improved varieties. Wheat has been studied extensively; however, there are no published studies on the GE interactions of triticale in Australia under irrigated production systems. We conducted trials on 101 triticale genotypes at two locations over 4 years under intensive irrigated management practices and measured the yield potential, GE interactions, heritability and estimated genetic gain of yield, lodging resistance and several other traits important for breeding triticale. We found that high yield potential exceeding 10 t ha–1 exists in the Australian germplasm tested and that, in these irrigated trials, genotype accounted for a high proportion of the variability in all measured traits. All genetic parameters such as heritability and estimated genetic gain were high compared with rainfed studies. Breeding of triticale with improved yield and lodging resistance for irrigated environments is achievable and can be pursued with confidence in breeding programs.

© CSIRO 2015
Andrew Milgate, Ben Ovenden, Dante Adorada, Chris Lisle, John Lacy, and Neil Coombes "Genetic improvement of triticale for irrigated systems in south-eastern Australia: a study of genotype and genotype × environment interactions," Crop and Pasture Science 66(8), 782-792, (31 July 2015). https://doi.org/10.1071/CP14357
Received: 17 December 2014; Accepted: 1 April 2015; Published: 31 July 2015
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