A 6.49-Mb inversion associated with the purple embryo spot trait in potato.

ABSTRACT: The embryo spot trait leads to a deep purple or reddish coloration at the base of the cotyledons of the embryo, visible on both sides of flat potato (Solanum tuberosum) seeds. This trait has long been used by potato researchers and breeders as a morphological marker during dihaploid induction. The formation of embryo spots reflects the accumulation of anthocyanins, but the genetic basis of this trait remains unclear. In this study, we mapped the embryo spot trait to a 6.78-Mb region at the end of chromosome 10 using an F₂ population derived from a cross between spotted and spotless plants. The recombination rate in the candidate region is severely suppressed, posing challenges for the map-based cloning of the underlying gene and suggesting large-scale rearrangements in th

SUBMITTER: Wang P 

PROVIDER: S-EPMC11889318 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature