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Stability of Genome Composition and Recombination between Homoeologous Chromosomes in Festulolium (Festuca × Lolium) Cultivars
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SYSNO ASEP 0476565 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Stability of Genome Composition and Recombination between Homoeologous Chromosomes in Festulolium (Festuca × Lolium) Cultivars Author(s) Kopecký, David (UEB-Q) RID, ORCID
Šimoníková, Denisa (UEB-Q) ORCID
Ghesquière, M. (FR)
Doležel, Jaroslav (UEB-Q) RID, ORCIDNumber of authors 4 Source Title Cytogenetic and Genome Research. - : Karger - ISSN 1424-8581
Roč. 151, č. 2 (2017), s. 106-114Number of pages 9 s. Language eng - English Country CH - Switzerland Keywords Festulolium ; Genome composition ; Genomic in situ hybridization ; Grass hybrids ; Homoeologous recombination ; Lolium × Festuca Subject RIV EB - Genetics ; Molecular Biology OECD category Plant sciences, botany R&D Projects LO1204 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UEB-Q - RVO:61389030 UT WOS 000404007600006 EID SCOPUS 85015620521 DOI 10.1159/000458746 Annotation Festulolium are hybrids between fescue (Festuca) and ryegrass (Lolium) species and combine high seed yield of ryegrasses with abiotic stress tolerance of fescues. Chromosomes of Festuca and Lolium present in Festulolium freely pair and recombine, which results in highly variable progeny where every single plant has a unique chromosome constitution. Thus, the stability of the genomic composition in Festulolium cultivars is an important issue. In this work, we used in situ hybridization to examine the genomic composition (understood as the proportion of parental genomes present) over 3 consecutive generations of propagation via outcrossing (the first one being the generation used for cultivar registration) of 3 Festulolium cultivars. Our analysis revealed that the genome composition largely differs among the plants from individual cultivars but appears to be relatively stable over the generations. A gradual shift in the genome composition towards Lolium observed in the early generations of hybrids appears to reach a plateau where the proportions of parental genomes become stabilized. Nevertheless, the proportion remains unbalanced to a certain extent (always in favor of the Lolium genome) in each cultivar. Our observations indicate a possibility to modulate genomic composition in hybrids by breeders' selection without a compromise on stability. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2018
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