Počet záznamů: 1  

The detection, rate and manifestation of residual sexuality in apomictic populations of Pilosella (Asteraceae, Lactuceae)

  1. 1.
    0430238 - BU-J 2015 RIV NL eng J - Článek v odborném periodiku
    Krahulcová, Anna - Rotreklová, O. - Krahulec, František
    The detection, rate and manifestation of residual sexuality in apomictic populations of Pilosella (Asteraceae, Lactuceae).
    Folia Geobotanica. Roč. 49, č. 2 (2014), s. 239-258. ISSN 1211-9520
    Grant CEP: GA ČR GAP506/10/1363
    Institucionální podpora: RVO:67985939
    Klíčová slova: facultative apomixis * haploid parthenogenesis * interspecific hybridization * Pilosella * residual sexuality
    Kód oboru RIV: EF - Botanika
    Impakt faktor: 1.778, rok: 2014

    The effect of maternal, facultatively apomictic plants on population diversity was evaluated in seven hybridizing polypoid populations, where apomictic (P. aurantiaca or P. bauhini) and sexual (P. officinarum) biotypes coexist. Due to residual sexuality, the progeny different from their maternal parents (0.6-92.3% of embryos and 0-100% of seedlings) originated either sexually or via haploid parthenogenesis. The facultatively apomictic mothers generated the progeny more variable in ploidy level than was the progeny derived from sexual mothers. Residual sexuality in apomicts was also effective in experimental crosses. The 2n+n hybrids produced from an apomictic and a sexual parent (both in the field and in experiments), displayed similar reproductive behaviour, producing polyhaploid, sexual and apomictic progeny in variable ratios. The variation recorded in these populations suggests introgressive hybridization towards the sexual species.
    Trvalý link: http://hdl.handle.net/11104/0235132