ArticlePlant reproduction2016
Single-pollen genotyping to estimate mode of unreduced pollen formation in Citrus tamurana cv. Nishiuchi Konatsu.
Article in Plant reproduction, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- A simple and high-throughput single pollen genotyping pipeline to study meiosis in apple (Malus x domestica).Plant methods · 2026Article
- Consequences of whole genome duplication for 2n pollen performance.Plant reproduction · 2021Review
- Localization and characterization of Citrus centromeres by combining half-tetrad analysis and CenH3-associated sequence profiling.Plant cell reports · 2020Article
- Assessing Ploidy Level Analysis and Single Pollen Genotyping of Diploid and Euploid Citrus Genotypes by Fluorescence-Activated Cell Sorting and Whole-Genome Amplification.Frontiers in plant science · 2019Article
- Polyploidy in Fruit Tree Crops of the GenusFrontiers in plant science · 2019Article
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
key message2n pollen formed by FDR in citrus. The Japanese local citrus cultivar, Nishiuchi Konatsu (Citrus tamurana hort. ex Tanaka; NK hereafter), has the ability to produce unreduced 2n pollen grains, allowing generation of polyploid progenies via sexual polyploidization. In this study, we developed a method of single-pollen genotyping for citrus and applied it to the analysis of transmission of heterozygosity in NK 2n pollen grains. Heterozygosity transmission was expressed as the percentage inheritance of a set of heterozygous alleles from the parent to the 2n gamete. The pathway of 2n pollen development was investigated by applying the observed heterozygosity transmission and genetic distance to two different map functions, for first division restitution (FDR) and second division restitution (SDR). The fit of the values observed for both functions was calculated, while virtually moving the centromere position. We screened for six heterozygous SSR (codominant microsatellite marker loci) in NK, all of which were expected to lie within the same linkage group. Pollen germination prior to DNA extraction was essential for this work, and 6-h incubation proved to be optimal for subsequent PCR amplification. Single-pollen genotyping unreduced NK 2n pollen grains revealed that heterozygosity transmission exceeded 50 % in all six alleles, and fitness tests indicated that the FDR map function better fitted the heterozygosity transmission observed rather than the SDR function. Our data thus strongly indicate that 2n pollen in NK is a result of first division restitution.
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