ArticlePlant physiology2004
High-resolution physical mapping in Pennisetum squamulatum reveals extensive chromosomal heteromorphism of the genomic region associated with apomixis.
Article in Plant physiology, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers.
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Who cites it
40 citing papers in PubMed, 100 citations in OpenAlex.
- How Apomictic and Sexual Cenchrus Species Can Help Elucidate the Mechanisms Leading to Apospory.Methods in molecular biology (Clifton, N.J.) · 2026Article
- Map-Based Cloning of Apomixis Genes in Dandelion (Taraxacum officinale s.l.).Methods in molecular biology (Clifton, N.J.) · 2026Article
- Genetic Mapping in Apomicts.Methods in molecular biology (Clifton, N.J.) · 2026Article
- A sexual/apomictic consensus linkage map of Eragrostis curvula at tetraploid level.BMC plant biology · 2025Article
- Apomixis: oh, what a tangled web we have!Planta · 2023Review
- Genetic mapping of theFrontiers in plant science · 2023Article
- Evolution of Transcriptomes in Early-Generation Hybrids of the ApomicticInternational journal of molecular sciences · 2022Article
- Identification of structural variation and polymorphisms of a sex co-segregating scaffold in spinach.Plant reproduction · 2022Article
- Phylogenetically DistantFrontiers in plant science · 2022Article
- Apomixis: genetic basis and controlling genes.Horticulture research · 2022Article
- Environmental and Genetic Factors Affecting Apospory Expressivity in DiploidPlants (Basel, Switzerland) · 2021Article
- Review
- Single-cell transcriptome profiling of buffelgrass (Cenchrus ciliaris) eggs unveils apomictic parthenogenesis signatures.Scientific reports · 2021Article
- Differential Epigenetic Marks Are Associated with Apospory Expressivity in Diploid Hybrids ofPlants (Basel, Switzerland) · 2021Article
- Article
- A High-Density Linkage Map of the Forage GrassFrontiers in plant science · 2019Article
- A Plant-SpecificFrontiers in plant science · 2019Article
- Identifying and Engineering Genes for Parthenogenesis in Plants.Frontiers in plant science · 2019Review
- Seeds of doubt: Mendel's choice of Hieracium to study inheritance, a case of right plant, wrong trait.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2016Review
- Article
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Authors and funding
7 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Gametophytic apomixis is asexual reproduction as a consequence of parthenogenetic development of a chromosomally unreduced egg. The trait leads to the production of embryos with a maternal genotype, i.e. progeny are clones of the maternal plant. The application of the trait in agriculture could be a tremendous tool for crop improvement through conventional and nonconventional breeding methods. Unfortunately, there are no major crops that reproduce by apomixis, and interspecific hybridization with wild relatives has not yet resulted in commercially viable germplasm. Pennisetum squamulatum is an aposporous apomict from which the gene(s) for apomixis has been transferred to sexual pearl millet by backcrossing. Twelve molecular markers that are linked with apomixis coexist in a tight linkage block called the apospory-specific genomic region (ASGR), and several of these markers have been shown to be hemizygous in the polyploid genome of P. squamulatum. High resolution genetic mapping of these markers has not been possible because of low recombination in this region of the genome. We now show the physical arrangement of bacterial artificial chromosomes containing apomixis-linked molecular markers by high resolution fluorescence in situ hybridization on pachytene chromosomes. The size of the ASGR, currently defined as the entire hemizygous region that hybridizes with apomixis-linked bacterial artificial chromosomes, was estimated on pachytene and mitotic chromosomes to be approximately 50 Mbp (a quarter of the chromosome). The ASGR includes highly repetitive sequences from an Opie-2-like retrotransposon family that are particularly abundant in this region of the genome.
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