Journal article
A new allele of acid soil tolerance gene from a malting barley variety
BMC Genetics, Vol.16(1)
2015
Abstract
Background: Acid soil is a serious limitation to crop production all over the world. Toxic aluminium (Al) cations in acid soil inhibit root growth and reduce yield. Although a gene tolerant to acid soil has been identified, it has not been used in malting barley breeding, which is partly due to the acid soil tolerance gene being linked to unfavorable malting quality traits. Results: A Brazilian malting barley variety Br2 was identified as tolerant to acid soil. A doubled haploid (DH) population was developed from a cross between Br2 and the Australian acid-sensitive cultivar Hamelin. The DH population was tested for acid soil tolerance in native acid soil and a hydroponic system with pH 4.2, pH 4.2 + Al or pH 6.5, and genotyped using SSR, DArT and gene-specific markers. A single QTL was detected for all parameters related to acid soil tolerance. The QTL was mapped to the known HvMATE location on chromosome 4H. Sequence alignment of the HvMATE gene identified 13 INDELs and 87 SNPs, where one SNP coded for a single amino acid difference between the two varieties. A gene-specific marker was developed to detect the single nucleotide polymorphism between Hamelin and Br2. This marker co-segregated with aluminium tolerance and accounted for 79 % of phenotypic variation for acid soil tolerance. Conclusion: The present study identified a novel source of acid soil/Al tolerance from a Brazilian malting barley cultivar Br2. This variety tolerated Al toxicity but was sensitive to low pH which is similar to most other Al-tolerant varieties. A gene-specific marker Cit7 was developed based on the HvMATE gene sequence. Cit7 will improve the efficiency of molecular-assisted selection of new barley varieties with tolerance to acid soil. Multiple alleles exist for the acid soil tolerance gene on chromosome 4H, so a malting barley variety that tolerates acid soil could be developed by selecting suitable tolerant alleles. Tolerance to low pH may play an important role for barley to adapt to acid soils.
Details
- Title
- A new allele of acid soil tolerance gene from a malting barley variety
- Authors/Creators
- M. Bian (Author/Creator) - Huazhong Agricultural UniversityX. Jin (Author/Creator) - Zhejiang UniversityS. Broughton (Author/Creator) - Government of Western AustraliaX-Q Zhang (Author/Creator) - Murdoch UniversityG. Zhou (Author/Creator) - Government of Western AustraliaM. Zhou (Author/Creator) - University of TasmaniaG. Zhang (Author/Creator) - Zhejiang UniversityD. Sun (Author/Creator) - Huazhong Agricultural UniversityC. Li (Author/Creator) - Government of Western Australia
- Publication Details
- BMC Genetics, Vol.16(1)
- Publisher
- BioMed Central
- Identifiers
- 991005544996707891
- Copyright
- © 2015 Bian et al.
- Murdoch Affiliation
- State Agricultural Biotechnology Centre
- Language
- English
- Resource Type
- Journal article
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites
Metrics
116 File views/ downloads
136 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.45 Soil Science
- 3.45.473 Soil Phosphorus Dynamics
- Web Of Science research areas
- Genetics & Heredity
- ESI research areas
- Molecular Biology & Genetics