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Meta-analysis of major QTL for abiotic stress tolerance in barley and implications for barley breeding

Citation

Zhang, X and Shabala, S and Koutoulis, A and Shabala, L and Zhou, M, Meta-analysis of major QTL for abiotic stress tolerance in barley and implications for barley breeding, Planta, 245, (2) Article 283-295. ISSN 0032-0935 (2017) [Refereed Article]

Copyright Statement

Copyright 2016 Springer-Verlag Berlin Heidelberg

DOI: doi:10.1007/s00425-016-2605-4

Abstract

Drought, salinity and waterlogging are three major abiotic stresses limiting barley yield worldwide. Breeding for abiotic stress-tolerant crops has drawn increased attention, and a large number of quantitative trait loci (QTL) for drought, salinity, and waterlogging tolerance in barley have been detected. However, very few QTL have been successfully used in marker-assisted selection (MAS) in breeding. In this study, we summarized 632 QTL for drought, salinity and waterlogging tolerance in barley. Among all these QTL, only 195 major QTL were used to conduct meta-analysis to refine QTL positions for MAS. Meta-analysis was used to map the summarized major QTL for drought, salinity, and waterlogging tolerance from different mapping populations on the barley physical map. The positions of identified meta-QTL (MQTL) were used to search for candidate genes for drought, salinity, and waterlogging tolerance in barley. Both MQTL3H.4 and MQTL6H.2 control drought tolerance in barley. Fine-mapped QTL for salinity tolerance, HvNax4 and HvNax3, were validated on MQTL1H.4 and MQTL7H.2, respectively. MQTL2H.1 and MQTL5H.3 were also the target regions for improving salinity tolerance in barley. MQTL4H.4 is the main region controlling waterlogging tolerance in barley with fine-mapped QTL for aerenchyma formation under waterlogging conditions. Detected and refined MQTL and candidate genes are crucial for future successful MAS in barley breeding.

Item Details

Item Type:Refereed Article
Keywords:barley, meta-analysis, drought, salinity, waterlogging, 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:Shabala, S (Professor Sergey Shabala)
Author:Koutoulis, A (Professor Anthony Koutoulis)
Author:Shabala, L (Dr Lana Shabala)
Author:Zhou, M (Associate Professor Meixue Zhou)
ID Code:114276
Year Published:2017 (online first 2016)
Funding Support:Australian Research Council (LP120200516)
Web of Science® Times Cited:2
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2017-02-09
Last Modified:2017-11-20
Downloads:0

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