Incidence and developmental timing of endosperm failure in post-zygotic isolation between wild tomato lineages.

ABSTRACT: Background and Aims:Defective hybrid seed development in angiosperms might mediate the rapid establishment of intrinsic post-zygotic isolation between closely related species. Extensive crosses within and among three lineages of wild tomatoes (Solanum section Lycopersicon) were performed to address the incidence, developmental timing and histological manifestations of hybrid seed failure. These lineages encompass different, yet fairly recent, divergence times and both allopatric and partially sympatric pairs. Methods:Mature seeds were scored visually 2 months after hand pollinations, and viable-looking seeds were assessed for germination success. Using histological sections from early-developing seeds from a sub-set of crosses, the growth of three major seed compartments (endosperm, embryo

SUBMITTER: Roth M 

PROVIDER: S-EPMC5786209 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature