ArticleTAG. Theoretical and applied genetics. Theoretische und angewandte Genetik2024
Fine mapping of major QTL qshgd1 for spontaneous haploid genome doubling in maize (Zea mays L.).
Article in TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Somatic genome doubling determines fertility in maize haploids of inbred A427.Frontiers in plant science · 2026Article
- A two-stage screening approach integrated with GWAS for rare phenotypes such as spontaneous haploid genome doubling in maize.Frontiers in plant science · 2026Article
- Association mapping of haploid male fertility in sweet corn.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2025Article
- Genetic variation and heritability of haploid frailty in maize.Frontiers in plant science · 2025Article
- Genes and genetics belong to maize haploid induction.Frontiers in plant science · 2025Review
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Authors and funding
10 authors.
Funding
Abstract
key messageA large-effect QTL was fine mapped, which revealed 79 gene models, with 10 promising candidate genes, along with a novel inversion. In commercial maize breeding, doubled haploid (DH) technology is arguably the most efficient resource for rapidly developing novel, completely homozygous lines. However, the DH strategy, using in vivo haploid induction, currently requires the use of mutagenic agents which can be not only hazardous, but laborious. This study focuses on an alternative approach to develop DH lines-spontaneous haploid genome duplication (SHGD) via naturally restored haploid male fertility (HMF). Inbred lines A427 and Wf9, the former with high HMF and the latter with low HMF, were selected to fine-map a large-effect QTL associated with SHGD-qshgd1. SHGD alleles were derived from A427, with novel haploid recombinant groups having varying levels of the A427 chromosomal region recovered. The chromosomal region of interest is composed of 45 megabases (Mb) of genetic information on chromosome 5. Significant differences between haploid recombinant groups for HMF were identified, signaling the possibility of mapping the QTL more closely. Due to suppression of recombination from the proximity of the centromere, and a newly discovered inversion region, the associated QTL was only confined to a 25 Mb region, within which only a single recombinant was observed among ca. 9,000 BC
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