Počet záznamů: 1

Physical Distribution of Homoeologous Recombination in Individual Chromosomes of Festuca pratensis in Lolium multiflorum

  1. 1.
    0349180 - UEB-Q 2011 RIV CH eng J - Článek v odborném periodiku
    Kopecký, David - Havránková, Miroslava - Loureiro, J. - Castro, S. - Lukaszewski, A.J. - Bartoš, Jan - Kopecká, J. - Doležel, Jaroslav
    Physical Distribution of Homoeologous Recombination in Individual Chromosomes of Festuca pratensis in Lolium multiflorum.
    Cytogenetic and Genome Research. Roč. 129, 1-3 (2010), s. 162-172 ISSN 1424-8581
    Grant CEP: GA MZe QH71267; GA ČR GP521/07/P479
    Výzkumný záměr: CEZ:AV0Z50380511
    Klíčová slova: Chromosome introgression * Festuca * Flow cytometry
    Kód oboru RIV: GE - Šlechtění rostlin
    Impakt faktor: 1.783, rok: 2010

    Crossing over-based recombination is a powerful tool for generating new allelic combinations during sexual reproduction. It usually occurs between homologous chromosomes. However, under some conditions, homoeologues may also be capable of crossing over. Whether homologous and homoeologous crossovers are equivalent and governed by the same rules has never been established. Here we report on chromosome distribution of homoeologous crossovers in a unique system of Festuca X Lolium hybrids. Unlike in most other hybrids, in these intergeneric hybrids, homoeologous chromosomes are capable of pairing and crossing over with frequencies approaching that of homologues. At the same time, genome divergence makes cytological detection of chromosome recombination feasible. We analyzed the distribution of homoeologous recombination along individual chromosomes in a complete set of intergeneric single chromosome substitutions from F. pratensis into tetraploid L. multiflorum.
    Trvalý link: http://hdl.handle.net/11104/0189488