Marina Tsvetova1, Lev Elkonin1,*, Yulia Italianskaya1
Phyton-International Journal of Experimental Botany, Vol.88, No.4, pp. 389-401, 2019, DOI:10.32604/phyton.2019.07485
Abstract Apomictic seed development is a complex process including
formation of unreduced embryo sac, parthenogenetic embryo development from
the egg cell, and endosperm formation either autonomously, or due to
fertilization of polar nuclei by the sperm (under pseudogamous form of
apomixis). In the latter case, an obstacle to the normal endosperm development is
disturbance of maternal (m) -to-paternal (p) genomic ratio 2m: 1p that occurs in
the cases of pollination of unreduced embryo sac with haploid sperms. Usage of
tetraploid pollinators can overcome this problem because in such crosses
maternal-to-paternal genomic ratio is 4m: 2p that provides formation of kernels
with… More >
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