Identification of wild barley derived alleles associated with plant development in an Australian environment
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Identification of wild barley derived alleles associated with plant development in an Australian environment Anh-Tung Pham . Andreas Maurer . Klaus Pillen . Julian Taylor . Stewart Coventry . Jason K. Eglinton . Timothy J. March
Received: 8 April 2020 / Accepted: 19 August 2020 / Published online: 31 August 2020 Ó Springer Nature B.V. 2020
Abstract The objective of this study was to explore wild barley as a potential source of alleles controlling plant development that can be used to improve the adaptation of barley to the Australian environment. The HEB-25 population was evaluated in field conditions at Strathalbyn (South Australia) in 2015 and 2016 and phenotyped for five traits related to plant development, in addition to plant height and ear number. GWAS identified QTL for all traits, of which many co-localised with known phenology genes. In Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10681-020-02686-8) contains supplementary material, which is available to authorized users. A.-T. Pham T. J. March (&) School of Agriculture, Food and Wine, University of Adelaide, Waite Campus, Urrbrae, SA 5064, Australia e-mail: [email protected]
the Australian environment, it was found that the Gibberellic acid (GA)-dependant pathway is important in regulating key development stages including shooting, flowering and maturing compared to the photoperiod and vernalisation pathway. Beneficial alleles from wild barley were identified, such as at the QTL tightly linked to the swd1 locus belonging to the GA-dependant pathway, wild alleles from five subfamilies increased EAR by up to 2.23 ears per m2. At the identified QTL, a wide range of effects was observed due to the wild barley alleles thus providing new genetic diversity that can be utilised to fine-tune the adaptation of barley to the Australian environment.
J. K. Eglinton Sugar Research Australia, 71378 Bruce Highway, Gordonvale, QLD 4865, Australia
A. Maurer K. Pillen Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Betty-Heimann-Str. 3, 06120 Halle, Germany J. Taylor Biometry Hub, Waite Campus, Urrbrae, SA 5064, Australia S. Coventry Australian Grain Technologies, 20 Leitch Road, Roseworthy, SA 5371, Australia
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Keywords Barley Phenology Flowering time GWAS HEB-25 NAM QTL
Introduction Barley is ranked the fourth largest cereal crop worldwide in terms of production and the second in Australia (Punda 2009). Barley is used for animal feed, human nutrition, and for brewing, distilling, and other beverages (Akar et al. 2004). In Australia, barley production is 3.96 Mha and 9.13 MT (2010–2017 average), equating to a 2.3 t/ha average grain yield (ABARES 2018). This is lower compared to the yield average in other major barley growing countries such as Russia (4.2 t/ha), Germany (4.5 t/ha), and France (4.3 t/ha), Canada (4 t/ha) (Laidig et al. 2014; Deppermann et al. 2018; Schils et al.
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