Maternal factors have stronger effect on family sex ratio than nuclear factors in a trans-Atlantic cross of Silene vulgaris

Olson M.S., Štorchová H., Houliston G., Armstrong J.

Keywords: cytoplasmic male sterility, gynodioecy, male fertility restorer, metapopulation, population structure
Abstract: Methods: We measured the progeny sex ratios from a reciprocal cross between 10 half-sib families in Silene vulgaris from North America and Europe and sequenced the mitochondrial atp1 gene for each family. Results: Our results were inconsistent with the prediction of a mismatch between geographically distant populations. Patterns of progeny sex ratio suggested that frequencies of nuclear male fertility restorere alleles have low variability worldwide. Conclusions: Patterns of progeny sex ratios suggested at least four different matching CMS and restorer loci segregating within the cross and allude to the presence of a cost of restoration. Our results support previous research indicating that both CMS and restorer types are maintained over long time periods.
DOI: 10.1080/17550874.2019.1610915
IEB authors: Helena Štorchová