Publications by authors named "Soo-Seong Lee"
Article Synopsis
- Hybridization and polyploidization are key processes in plant evolution, but overcoming natural reproductive barriers for genetic crosses is not well understood.
- This study focuses on the synthetic allotetraploid plant xBrassicoraphanus, formed from Brassica rapa and Raphanus sativus, to explore its hybrid genome structure, chromosome behavior, and gene expression dynamics.
- Findings indicate that xBrassicoraphanus maintains both parental chromosomes without rearrangement, shows reconfiguration of gene expression networks, and demonstrates transcriptional silencing of certain transposable elements, highlighting the role of epigenetic changes in hybrid stability and compatibility.
Article Synopsis
- Intergeneric crosses can enhance crop traits but require careful genome analysis to monitor genetic stability.
- Microsatellites were analyzed in several species to find specific markers for different genomes, leading to the identification of three distinct microsatellites that correspond to A, C, and B/R genomes.
- These microsatellites, along with rDNA and telomeric probes, facilitate the easy identification of homologous chromosomes in closely related species, aiding in the study of genetic stability in new synthetic polyploids.
Background: Hybridization and polyploidization events are important driving forces in plant evolution. Allopolyploids formed between different species can be naturally or artificially created but often suffer from genetic instability and infertility in successive generations. xBrassicoraphanus is an intergeneric allopolyploid obtained from a cross between Brassica rapa and Raphanus sativus, providing a useful resource for genetic and genomic study in hybrid species.
View Article and Find Full Text PDFHybridization and polyploidization are major driving forces in plant evolution. Allopolyploids can be occasionally formed from a cross between distantly related species but often suffer from chromosome instability and infertility. x is an intergeneric allotetraploid (AARR; 2n = 38) derived from a cross between (AA; 2n = 20) and (RR; 2n = 18).
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- Research focused on the genetic inheritance of clubroot resistance in Brassicaceae crops, specifically analyzing a double haploid population from resistant (09CR500) and susceptible (09CR501) lines.
- The clubroot resistance in "09CR500" was determined to be controlled by a single dominant gene, showing nearly equal segregation between resistant and susceptible plants.
- A specific genetic marker ("09CR.11390652") was found to effectively distinguish resistant phenotypes, making it valuable for breeding programs and the development of resilient crop varieties.
A novel dominant resistance gene, TuRB07, was found to confer resistance to an isolate of TuMV strain C4 in B. rapa line VC1 and mapped on the top of chromosome A06. The inheritance of resistance to Turnip mosaic virus in Brassica rapa was investigated by crossing the resistant line, VC1 with the susceptible line, SR5, and genotyping and phenotyping diverse progenies derived from this cross.
View Article and Find Full Text PDFBrassica rapa is a member of the Brassicaceae family and includes vegetables and oil crops that are cultivated worldwide. The introduction of durable resistance against turnip mosaic virus (TuMV) into agronomically important cultivars has been a significant challenge for genetic and horticultural breeding studies of B. rapa.
View Article and Find Full Text PDFQuantitative trait loci (QTL) controlling callus induction and plant regeneration were identified in the VCS3M-DH population of Brassica rapa. Quantitative trait loci (QTL) controlling callus induction and plant regeneration were identified in the VCS3M-DH population of Brassica rapa. The VCS3M-DH population showed wide and continuous variation in callus induction and shoot regeneration.
View Article and Find Full Text PDFInduced mutations were used to improve the low seed fertility of an intergeneric allopolyploid, 'Baemoochae,' ×Brassicoraphanus, synthesized following hybridization between Brassica rapa and Raphanus sativus. The mutagen N-methyl-N-nitroso-urethane (NMU) was added to microspore cultures. Four lines of nine in the Mi(2) generation showed very high fertility under controlled pollination.
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