AUTHOR=Koide Yohei , Kuniyoshi Daichi , Kishima Yuji 

TITLE=Fertile Tetraploids: New Resources for Future Rice Breeding?

JOURNAL=Frontiers in Plant Science

VOLUME=11

YEAR=2020

URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2020.01231

DOI=10.3389/fpls.2020.01231

ISSN=1664-462X

ABSTRACT=<p>Ploidy manipulation is an efficient technique for the development of novel phenotypes in plant breeding. However, in rice (<italic>Oryza sativa</italic> L.), severe seed sterility has been considered a barrier preventing cultivation of autotetraploids since the 1930s. Recently, a series of studies identified two fertile autotetraploids, identified herein as the PMeS (Polyploid Meiosis Stability) and Neo-Tetraploid lines. Here, we summarize their characteristics, focusing on the recovery of seed fertility, and discuss potential future directions of study in this area, providing a comprehensive understanding of current progress in the study of fertile tetraploid rice, a classical, but promising, concept for rice breeding.</p>