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  1. 1 Journal of Applied Genetics

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  1. 1 1995

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  1. 1 Kazimierska E. M.

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Morphology and fertility of spontaneous octoploid of white clover (Trifolium repens L.)

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Kazimierska E. M.
Journal of Applied Genetics
|
1995
|
vol. 36
|
issue 4
341-352
EN
In the progeny of a hybrid obtaned after crossing local Polish and local Bulgarian white clover genortypes one octoploid (2n=64) plants was selected.In view of difficulties to obtain seeds, the octoploid plant was vegetatively propagated.The progeny of the octoploid obtained as a results of self-and-cross-pollination of cloned plants was examined and compared to related tetraploids with respect to morphological characters, fertility and embryo sac structure.Vegetative and generative organs of the octoploid were slightly larger than those of tetraploids.The number of flowers per head was larger in the octoploid than in tetraploid plants.The spontaneous octoploid appeared to have a low fertility after both cross- and self-pollination.It was most probably caused by low polen viability, by decline of megasporocyte and megagametocyte in the process of ontogenesis and by smaller ovule number per ovary.Seeds of octoploids were partially under developed and only 23.85% of them gave rise to seedlings.
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