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

0430238 - BÚ 2015 RIV NL eng J - Journal Article
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. E-ISSN 1874-9348
R&D Projects: GA ČR GAP506/10/1363
Institutional support: RVO:67985939
Keywords : facultative apomixis * haploid parthenogenesis * interspecific hybridization * Pilosella * residual sexuality
Subject RIV: EF - Botanics
Impact factor: 1.778, year: 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.
Permanent Link: http://hdl.handle.net/11104/0235132