Seed traits, terminal velocity and germination in sexual diploid and apomictic triploid Hieracium alpinum (Asteraceae): Are apomicts better dispersers?

0490281 - BÚ 2019 RIV DE eng J - Journal Article
Chrtek, Jindřich - Hartmann, M. - Mrázová, Viera - Zdvořák, P. - Štefánek, M. - Mráz, P.
Seed traits, terminal velocity and germination in sexual diploid and apomictic triploid Hieracium alpinum (Asteraceae): Are apomicts better dispersers?
Flora. Roč. 240, Mar 2018 (2018), s. 76-81. ISSN 0367-2530. E-ISSN 1618-0585
Institutional support: RVO:67985939
Keywords : geographical parthogenesis * polyploidy * seeds
OECD category: Plant sciences, botany
Impact factor: 1.423, year: 2018

Diploid and triploid seeds of Hieracium alpinum did not differ significantly in most morphological traits, except for triploid seeds being wider. Terminal velocity was greater in diploid seeds compared to triploid seeds. This difference was not significant if a nested design (ploidy, population, mother plant) was used but significant if the population level was not considered, indicating high interpopulation variation in this trait. Terminal velocity was positively and significantly correlated with seed mass, length and width and negatively correlated with pappus length and width. Germination probability was positively associated with seed mass and negatively with ploidy (higher in diploids, compared to triploids).
Permanent Link: http://hdl.handle.net/11104/0284539