Ma, Y and Shabala, S and Li, C and Liu, C and Zhang, W and Zhou, M, Quantitative trait loci for salinity tolerance identified under drained and waterlogged conditions and their association with flowering time in barley (Hordeum vulgare. L), PLoS One, 10, (8) Article e0134822. ISSN 1932-6203 (2015) [Refereed Article]
Copyright 2015 Ma et al. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) http://creativecommons.org/licenses/by/4.0/
Introduction: Salinity is one of the major abiotic stresses affecting crop production via adverse effects of osmotic stress, specific ion toxicity, and stress-related nutritional disorders. Detrimental effects of salinity are also often exacerbated by low oxygen availability when plants are grown under waterlogged conditions. Developing salinity-tolerant varieties is critical to overcome these problems, and molecular marker assisted selection can make breeding programs more effective.
Methods: In this study, a double haploid (DH) population consisting of 175 lines, derived from a cross between a Chinese barley variety Yangsimai 1 (YSM1) and an Australian malting barley variety Gairdner, was used to construct a high density molecular map which contained more than 8,000 Diversity Arrays Technology (DArT) markers and single nucleotide polymorphism (SNP) markers. Salinity tolerance of parental and DH lines was evaluated under drained (SalinityD) and waterlogged (SalinityW) conditions at two different sowing times.
Results: Three quantitative trait loci (QTL) located on chromosome 1H, single QTL located on chromosomes 1H, 2H, 4H, 5H and 7H, were identified to be responsible for salinity tolerance under different environments. Waterlogging stress, daylight length and temperature showed significant effects on barley salinity tolerance. The QTL for salinity tolerance mapped on chromosomes 4H and 7H, QSlwd.YG.4H, QSlwd.YG.7H and QSlww.YG.7H were only identified in winter trials, while the QTL on chromosome 2H QSlsd.YG.2H and QSlsw.YG.2H were only detected in summer trials. Genes associated with flowering time were found to pose significant effects on the salinity QTL mapped on chromosomes 2H and 5H in summer trials. Given the fact that the QTL for salinity tolerance QSlsd.YG.1H and QSlww.YG.1H-1 reported here have never been considered in the literature, this warrants further investigation and evaluation for suitability to be used in breeding programs.
|Item Type:||Refereed Article|
|Keywords:||salinity, waterlogging, flooding, QTL|
|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|
|UTAS Author:||Ma, Y (Ms Yanling Ma)|
|UTAS Author:||Shabala, S (Professor Sergey Shabala)|
|UTAS Author:||Zhou, M (Professor Meixue Zhou)|
|Web of Science® Times Cited:||6|
|Deposited By:||Tasmanian Institute of Agriculture|
|Downloads:||208 View Download Statistics|
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