Cases of polyembryony have been reported in non-apomictic genotypes as a consequence of 2x × 4x hybridizations and in vitro culture of isolated nucelli. Aleza et al. demonstrate that embryogenic cells or proembryos, which normally remain quiescent, are formed by cleavage of the zygotic embryo. The development of these adventitious cells or embryos can take place in vivo and in vitro as a consequence of mechanic or genetic procedures that prevent the dominance of the initial zygotic embryo.
The genus Boechera (Brassicaceae) is comprised of both sexual and apomictic species, permitting comparative analyses of meiotic disturbances and parthenogenesis. Hybridization, polyploidy and environmental adaptation...
Under self-pollination induction three genotypes of P. rufum develop seeds from both meiotic and aposporous embryo sacs.
The gene pool of Citrus and related genera of Aurantioideae is essentially diploid but tetraploid plants are frequently encountered in seedlings of diploid apomictic genotypes. Aleza et al. demonstrate that...
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Alex Assiry
