Overerving van zelffertiliteit in tetraploïde rode klaver

Tetraploid red clover (Trifolium pratense L.) is highly productive and persistent, but often displays unsatisfactory seed yield. Previous research in tetraploid red clover suggested a possible association between self-fertility and seed yield. In this paper, we investigated the inheritance of the self-fertility trait in tetraploid red clover. Self-compatible (SC) and self-incompatible (SI) genotypes were available from previous studies. Four inbred populations (S1) were obtained through self-fertilization of SC genotypes. Eleven F1 populations were obtained from crosses between SI and SC genotypes. Self-fertilization of SC genotypes yielded significantly more seeds than SI x SC crosses (5228 vs. 1125 seeds/plant respectively). Subsequently, S1 and F1 progeny populations were evaluated for their ability to self-fertilize. S1 populations displayed 95% self-fertile plants, while F1 populations displayed 69% self-fertile plants. In addition, S1 populations yielded more seeds than F1 populations when self-pollinated (401 vs. 149 seeds/plant respectively). These results clearly show that the ability to self-fertilize is a heritable trait in tetraploid red clover. To get more insights in the inheritance of self-compatibility, a subset of S2 and F2 populations has been selected for a next round of self-fertilization to be performed during summer 2021.

ISBN:978-80-224-5967-7

Jaar van publicatie:2021

Trefwoorden:clover, TETRAPLOIDS, self-fertility

Toegankelijkheid:Open