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Identification of aerenchyma formation-related QTL in barley that can be effective in breeding for waterlogging tolerance

Citation

Zhang, X and Zhou, G and Shabala, S and Koutoulis, A and Shabala, L and Johnson, P and Li, C and Zhou, M, Identification of aerenchyma formation-related QTL in barley that can be effective in breeding for waterlogging tolerance, Theoretical and Applied Genetics, 129, (6) pp. 1167-1177. ISSN 0040-5752 (2016) [Refereed Article]

Copyright Statement

2016 Springer

DOI: doi:10.1007/s00122-016-2693-3

Abstract

Waterlogging is one of the important limiting conditions for crop yield and productivity. The main feature of waterlogged soils is oxygen deprivation, due to slow gas diffusion in water. Decreased oxygen content in waterlogged soils leads to the oxygen deficiency in plant tissues, resulting in reduced energy availability for plants. Rapidly induced aerenchyma formation is critical to maintaining adequate oxygen supply and overall waterlogging tolerance in barley. In this study, we have proved that quantifying aerenchyma formation after 7 days of waterlogging in commercial potting mixture can be a reliable, fast, and widely utilised approach for the selection of waterlogging tolerant barley genotypes, which is supported by measurements of redox potential (an indicator of anaerobic conditions). This protocol was also used to identify quantitative trait loci (QTL) in a doubled haploid population of barley from the cross between Yerong (tolerant) and Franklin (sensitive) genotypes. The QTL for aerenchyma formation and root porosity were at the same location as the waterlogging tolerance QTL. Seven new markers were developed and added onto this region on chromosome 4H. One major QTL for aerenchyma formation after 7 days waterlogging treatment explained 44.0 % of the phenotypic variance. This successful QTL for aerenchyma formation can be effectively used in the marker assisted selection to improve waterlogging tolerance in barley.

Key message: Aerenchyma formation after 7 days of waterlogging in commercial potting mixture can be a reliable, fast, and widely utilized approach for the selection of waterlogging tolerant barley genotypes. One major QTL for aerenchyma formation after 7 days of waterlogging treatment was identified and the newly developed markers explained 44 % of the phenotypic variance. This QTL can now be effectively used in barley breeding programs.

Item Details

Item Type:Refereed Article
Keywords:aerenchyma, waterlogging tolerance, barley, QTL, genotypes
Research Division:Agricultural and Veterinary Sciences
Research Group:Crop and Pasture Production
Research Field:Crop and Pasture Improvement (Selection and Breeding)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Winter Grains and Oilseeds
Objective Field:Barley
Author:Zhang, X (Mr Xuechen Zhang)
Author:Shabala, S (Professor Sergey Shabala)
Author:Koutoulis, A (Professor Anthony Koutoulis)
Author:Shabala, L (Dr Lana Shabala)
Author:Johnson, P (Dr Peter Johnson)
Author:Zhou, M (Associate Professor Meixue Zhou)
ID Code:110065
Year Published:2016
Web of Science® Times Cited:3
Deposited By:Plant Science
Deposited On:2016-07-12
Last Modified:2017-09-19
Downloads:0

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