Meta-QTLs, ortho-MetaQTLs and candidate genes for grain Fe and Zn contents in wheat (Triticum aestivum L.)

被引:18
作者
Singh, Rakhi [1 ]
Saripalli, Gautam [1 ,2 ]
Gautam, Tinku [1 ]
Kumar, Anuj [1 ]
Jan, Irfat [1 ]
Batra, Ritu [1 ]
Kumar, Jitendra [3 ]
Kumar, Rahul [1 ]
Balyan, Harindra Singh [1 ]
Sharma, Shailendra [1 ]
Gupta, Pushpendra Kumar [1 ]
机构
[1] Ch Charan Singh Univ, Dept Genet & Plant Breeding, Meerut 250004, Uttar Pradesh, India
[2] Univ Maryland, Dept Plant Sci & Landscape Architecture, College Pk, MD 20742 USA
[3] Govt India, Natl Agrifood Biotechnol Inst NABI, Dept Biotechnol, Sect 81 Knowledge City, Mohali 140306, Punjab, India
关键词
Wheat; Grain iron (GFe); Grain zinc (GZn); meta-QTL; Candidate genes; Ortho-meta QTL; qRT-PCR; QUANTITATIVE TRAIT LOCI; FERRIC-CHELATE REDUCTASE; HIDDEN HUNGER; MICRONUTRIENTS CONCENTRATION; HUMAN HEALTH; ZINC; IRON; DENSITY; MAP; BIOFORTIFICATION;
D O I
10.1007/s12298-022-01149-9
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Majority of cereals are deficient in essential micronutrients including grain iron (GFe) and grain zinc (GZn), which are therefore the subject of research involving biofortification. In the present study, 11 meta-QTLs (MQTLs) including nine novel MQTLs for GFe and GZn contents were identified in wheat. Eight of these 11 MQTLs controlled both GFe and GZn. The confidence intervals of the MQTLs were narrower (0.51-15.75 cM) relative to those of the corresponding QTLs (0.6 to 55.1 cM). Two ortho-MQTLs involving three cereals (wheat, rice and maize) were also identified. Results of MQTLs were also compared with the results of earlier genome wide association studies (GWAS). As many as 101 candidate genes (CGs) underlying MQTLs were also identified. Twelve of these CGs were prioritized; these CGs encoded proteins with important domains (zinc finger, RING/FYVE/PHD type, flavin adenine dinucleotide linked oxidase, etc.) that are involved in metal ion binding, heme binding, iron binding, etc. qRT-PCR analysis was conducted for four of these 12 prioritized CGs using genotypes which have differed for GFe and GZn. Significant differential expression in these genotypes was observed at 14 and 28 days after anthesis. The MQTLs/CGs identified in the present study may be utilized in marker-assisted selection (MAS) for improvement of GFe/GZn contents and also for understanding the molecular basis of GFe/GZn homeostasis in wheat.
引用
收藏
页码:637 / 650
页数:14
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