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Identification of quantitative trait loci and candidate genes for grain superoxide dismutase activity in wheat
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Identification of quantitative trait loci and candidate genes for grain superoxide dismutase activity in wheat
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Journal Article
Identification of quantitative trait loci and candidate genes for grain superoxide dismutase activity in wheat
2024
Overview
Background
Superoxide dismutase (SOD) can greatly scavenge reactive oxygen species (ROS) in plants. SOD activity is highly related to plant stress tolerance that can be improved by overexpression of SOD genes. Identification of SOD activity-related loci and potential candidate genes is essential for improvement of grain quality in wheat breeding. However, the loci and candidate genes for relating SOD in wheat grains are largely unknown. In the present study, grain SOD activities of 309 recombinant inbred lines (RILs) derived from the ‘Berkut’ × ‘Worrakatta’ cross were assayed by photoreduction method with nitro-blue tetrazolium (NBT) in four environments. Quantitative trait loci (QTL) of SOD activity were identified using inclusive composite interval mapping (ICIM) with the genotypic data of 50 K single nucleotide polymorphism (SNP) array.
Results
Six QTL for SOD activity were mapped on chromosomes 1BL, 4DS, 5AL (2), and 5DL (2), respectively, explaining 2.2 ~ 7.4% of the phenotypic variances. Moreover,
QSOD.xjau-1BL
,
QSOD.xjau-4DS
,
QSOD.xjau-5 A.1
,
QSOD.xjau-5 A.2
, and
QSOD.xjau-5DL.2
identified are likely to be new loci for SOD activity. Four candidate genes
TraesCS4D01G059500
,
TraesCS5A01G371600
,
TraesCS5D01G299900
,
TraesCS5D01G343100LC
, were identified for
QSOD.xjau-4DS
,
QSOD.xjau-5AL.1
, and
QSOD.xjau-5DL.1
(2), respectively, including three SOD genes and a gene associated with SOD activity. Based on genetic effect analysis, this can be used to identify desirable alleles and excellent allele variations in wheat cultivars.
Conclusion
These candidate genes are annotated for promoting SOD production and inhibiting the accumulation of ROS during plant growth. Therefore, lines with high SOD activity identified in this study may be preferred for future wheat breeding.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
Subject
Abiotic stress tolerance in plants
/ Alleles
/ Analysis
/ Biomedical and Life Sciences
/ Breeding
/ Enzymes
/ Flour
/ Genes
/ Genomes
/ Grain
/ Growth
/ Quantitative trait locus (QTL)
/ Single nucleotide polymorphisms
/ Single-nucleotide polymorphism
/ Software
/ Superoxide dismutase (SOD) activity
/ Wheat
