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A major QTL controlling the tolerance to manganese toxicity in barley (Hordeum vulgare L.)


Huang, X and Fan, Y and Shabala, L and Rengel, Z and Shabala, S and Zhou, MX, A major QTL controlling the tolerance to manganese toxicity in barley (Hordeum vulgare L.), Molecular Breeding, 38, (2) Article 16. ISSN 1380-3743 (2018) [Refereed Article]

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Copyright 2018 Springer Science+Business Media B.V., part of Springer Nature

DOI: doi:10.1007/s11032-017-0767-9


Waterlogging stress disturbs plant metabolism through increased ion (manganese and iron) toxicity resulting from the changes in the soil redox potential under hypoxic conditions. Our previous study found a significant correlation between the tolerance to Mn2+ toxicity and waterlogging stress tolerance in barley, suggesting that waterlogging tolerance could be increased by improving the tolerance to Mn2+ toxicity. In this study, a doubled-haploid (DH) population from the cross between barley varieties Yerong and Franklin (waterlogging-tolerant and -sensitive, respectively) was used to identify QTL controlling tolerance to Mn2+ toxicity based on chlorophyll content and plant survival as selection criteria. Four significant QTL for plant survival under Mn2+ stress (QSur.yf.1H, QSur.yf.3H, QSur.yf.4H, and QSur.yf.6H) were identified in this population at the seedling stage. Two significant QTL (QLC.yf.3H and QLC.yf.6H) controlling leaf chlorosis under Mn2+ stress were identified on chromosomes 3H and 6H close to QSur.yf.3H and QSur.yf.6H. The major QTL QSur.yf.3H, located near the marker Bmag0013, explained 21% of the phenotypic variation. The major QTL for plant survival on 3H was validated in a different DH population (TX9425/Naso Nijo). This major QTL could potentially be used in breeding programmes to enhance tolerance to both manganese toxicity and waterlogging.

Item Details

Item Type:Refereed Article
Keywords:barley (Hordeum vulgare L.), Mn2+ toxicity, waterlogging tolerance, QTL mapping
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Crop and pasture production
Research Field:Crop and pasture improvement (incl. selection and breeding)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Grains and seeds
Objective Field:Barley
UTAS Author:Huang, X (Mr Xin Huang)
UTAS Author:Fan, Y (Miss Yun Fan)
UTAS Author:Shabala, L (Associate Professor Lana Shabala)
UTAS Author:Rengel, Z (Professor Zed Rengel)
UTAS Author:Shabala, S (Professor Sergey Shabala)
UTAS Author:Zhou, MX (Professor Meixue Zhou)
ID Code:125787
Year Published:2018
Funding Support:Australian Research Council (LP120200516)
Web of Science® Times Cited:4
Deposited By:TIA - Research Institute
Deposited On:2018-05-05
Last Modified:2019-01-15

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