The intriguing complexity of parthenogenesis inheritance in Pilosella rubra (Asteraceae, Lactuceae)

0379731 - BÚ 2013 RIV DE eng J - Journal Article
Rosenbaumová, R. - Krahulcová, Anna - Krahulec, František
The intriguing complexity of parthenogenesis inheritance in Pilosella rubra (Asteraceae, Lactuceae).
Sexual Plant Reproduction. Roč. 25, č. 3 (2012), s. 185-196. ISSN 0934-0882
R&D Projects: GA ČR GA206/08/0890
Institutional research plan: CEZ:AV0Z60050516
Institutional support: RVO:67985939
Keywords : apomixis * inheritance of parthenogenesis * haploid parthenogenesis
Subject RIV: EF - Botanics
Impact factor: 2.070, year: 2012

The study is focused on the inheritance of parthenogenesis in Pilosella (Asteraceae). A complex pattern was recorded in the segregating F1 progeny from reciprocal crosses between the facultatively apomictic hexaploid P. rubra and the sexual tetraploid P. officinarum. The actual transmission rates of parthenogenesis were significantly correlated with the mode of origin of the respective progeny class. The inheritance was significantly reduced in n + n progeny from the cross where parthenogenesis was transmitted by female gametes. In n + 0 polyhaploid progeny, the transmission rate of parthenogenesis was high. Reduced female gametes transmitting parthenogenesis preferentially developed parthenogenetically and only rarely were fertilized in P. rubra. We observed the different expression of complete apomixis in 2n + n hybrids as compared to their apomictic maternal parent. We suggest that this difference is a result of unspecified interactions between the parental genomes.
Permanent Link: http://hdl.handle.net/11104/0210617