Transposable elements cause the loss of self-incompatibility in citrus.

ABSTRACT: Self-incompatibility (SI) is a widespread prezygotic mechanism for flowering plants to avoid inbreeding depression and promote genetic diversity. Citrus has an S-RNase-based SI system, which was frequently lost during evolution. We previously identified a single nucleotide mutation in S_m-RNase, which is responsible for the loss of SI in mandarin and its hybrids. However, little is known about other mechanisms responsible for conversion of SI to self-compatibility (SC) and we identify a completely different mechanism widely utilized by citrus. Here, we found a 786-bp miniature inverted-repeat transposable element (MITE) insertion in the promoter region of the FhiS₂-RNase in Fortunella hindsii Swingle (a model plant for citrus gene function), which does not contain the

SUBMITTER: Hu J 

PROVIDER: S-EPMC11022811 | biostudies-literature | 2024 May

REPOSITORIES: biostudies-literature