ArticlePlant cell reports2015
Mapping QTLs for opaque2 modifiers influencing the tryptophan content in quality protein maize using genomic and candidate gene-based SSRs of lysine and tryptophan metabolic pathway.
Article in Plant cell reports, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.
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20 citing papers in PubMed, 43 citations in OpenAlex.
- Integrating QTL mapping with transcriptome analysis uncovers candidate genes of ear length in maize.BMC plant biology · 2026Article
- Breeding for colored quality protein popcorn with improved amino acid composition.Frontiers in plant science · 2026Article
- Characterization of Grain Structure Using Micro-CT and Identification of Related Candidate Genes by QTL Mapping in Foxtail Millet.Plants (Basel, Switzerland) · 2025Article
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- Dissecting the genetic architecture of polygenic nutritional traits in maize through meta-QTL analysis.Food chemistry. Molecular sciences · 2025Article
- Unraveling the interactive effect of opaque2 and waxy1 genes on kernel nutritional qualities and physical properties in maize (Zea mays L.).Scientific reports · 2025Article
- Identification of QTLs associated withFrontiers in plant science · 2025Article
- Genetic analysis of QTLs for lysine content in four maize DH populations.BMC genomics · 2024Article
- Maize Endosperm Development: Tissues, Cells, Molecular Regulation and Grain Quality Improvement.Frontiers in plant science · 2022Review
- GBS-Based SNP Map Pinpoints the QTL Associated With Sorghum Downy Mildew Resistance in Maize (Frontiers in genetics · 2022Article
- Final Selection of Quality Protein Popcorn Hybrids.Frontiers in plant science · 2021Article
- Genetic enhancement of essential amino acids for nutritional enrichment of maize protein quality through marker assisted selection.Physiology and molecular biology of plants : an international journal of functional plant biology · 2020Article
- Production and Selection of Quality Protein Popcorn Hybrids Using a Novel Ranking System and Combining Ability Estimates.Frontiers in plant science · 2020Article
- The Second Site Modifier,The Plant cell · 2019Article
- Marker-assisted introgression of opaque2 allele for rapid conversion of elite hybrids into quality protein maize.Journal of genetics · 2018Article
- Generation and Evaluation of ModifiedFrontiers in plant science · 2018Article
- Marker-assisted breeding for introgression of opaque-2 allele into elite maize inbred line BML-7.3 Biotech · 2017Article
- Introgression of opaque2 into Waxy Maize Causes Extensive Biochemical and Proteomic Changes in Endosperm.PloS one · 2016Article
- Article
- Assessing inbred-hybrid relationships for developing drought-tolerant provitamin A-quality protein maize hybrids.Agronomy journalArticle
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4 authors at 3 institutions in 1 country.
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Abstract
key messageThe mapping analysis resulted in identification of five significant QTLs for opaque2 modifiers influencing the tryptophan content in quality protein maize using functional and genomic SSR markers. Quality protein maize (QPM) was developed by selecting genetic modifiers that convert opaque2 mutant containing high lysine and tryptophan. There are several unlinked opaque2 modifier loci (Opm) in QPM whose location, nature and mode of action are not clear. To identify these Opm QTLs, we developed a population of 218 F2:3 individuals from a cross between VQL2 and VQL8, two isogenic QPM inbreds significantly differing in tryptophan content. Based on the data of the F2:3 population, five significant QTLs on chromosomes 5, 7 and 9 with LOD values more than 2.5 were identified and together explained 38.6 % of the total phenotypic variance (R (2)). The Wx1 gene which has influence on the amino acid composition of the maize endosperm was mapped on chromosome 9 near the marker phi022 and also validated by bulk analysis. The QTL near the SSR marker ZmASK3, developed from the aspartate kinase 2 gene of the lysine pathway, mapped on chromosome 5 and had LOD of 2.7 with R (2) of 5.1 %. On chromosome 9, the QTL between the loci umc1430 and bnlg1401 had an LOD of 4.5 with R (2) of 9.1 %, whereas the QTL between the loci bnlg1401 and phi022 had an LOD of 4.2 with R (2) of 8.4 %. The third QTL was observed to be close to the marker umc2207 with an LOD of 4.8 and R (2) of 8.4 %. The identified QTLs will be very useful in the marker-assisted back-cross breeding and transgressive breeding for the development of QPM maize.
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