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A new major-effect QTL for waterlogging tolerance in wild barley (H. spontaneum)

Citation

Zhang, X and Fan, Y and Shabala, S and Koutoulis, A and Shabala, L and Johnson, P and Hu, H and Zhou, M, A new major-effect QTL for waterlogging tolerance in wild barley (H. spontaneum), Theoretical and Applied Genetics, 130, (8) pp. 1559-1568. ISSN 1432-2242 (2017) [Refereed Article]

Copyright Statement

Copyright 2017 Springer-Verlag Berlin Heidelberg

DOI: doi:10.1007/s00122-017-2910-8

Abstract

We report the first study on the unique allele from wild barley that can improve waterlogging tolerance in cultivated barley with a substantially higher contribution to aerenchyma formation. Waterlogging is one of the major abiotic stresses that dramatically reduce barley crop yield. Direct selection on waterlogging tolerance in the field is less effective due to its viability to environment. The most effective way of selection is to choose traits that make significant contributions to the overall tolerance and are easy to score. Aerenchyma formation under waterlogging stress is one of the most effective mechanisms to provide adequate oxygen supply and overcome stress-induced hypoxia imposed on plants. In this study, a new allele for aerenchyma formation was identified from a wild barley accession TAM407227 on chromosome 4H. Compared to that identified in cultivated barley, this allele not only produced a greater proportion of aerenchyma but made a greater contribution to the overall waterlogging tolerance. The QTL explained 76.8% of phenotypic variance in aerenchyma formation with a LOD value of 51.4. Markers co-segregating with the trait were identified and can be effectively used in marker assisted selection.

Item Details

Item Type:Refereed Article
Keywords:barley, abiotic stress tolerance
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:Fan, Y (Miss Yun Fan)
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:Hu, H (Mr Hongliang Hu)
Author:Zhou, M (Associate Professor Meixue Zhou)
ID Code:119925
Year Published:2017
Funding Support:Australian Research Council (LP120200516)
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2017-08-07
Last Modified:2017-09-11
Downloads:0

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