Flowers of (A) wild rice and (B) domestic rice.
Home ยป An overview on reproductive isolation in Oryza sativa complex

An overview on reproductive isolation in Oryza sativa complex

Reproductive isolation is generally regarded as the essence of the speciation process. The evolution of reproductive isolation allows differentiation and permits local adaptations to become fixed in diverging populations. Studying closely related species is convenient for understanding the genetic basis of this process. With this in mind, Nadir et al. restricted their subject species to the Oryza sativa complex, which includes the two domestic rice cultivars and six wild relatives. Although closely related, these rice species are separated from each other by a range of reproductive barriers.

Flowers of (A) wild rice and (B) domestic rice.
Figure representing the variation in floral characteristics between (A) wild rice and (B) domestic rice. Image credit: Nadir et al.

The comprehensive review, recently published in AoBP, evaluates current understanding of the forces that shaped the formation of reproductive barriers among and between the species of the O. sativa complex; including pre-zygotic barriers, such as differing floral morphology and offset flowering time, and post zygotic barriers, such as reduced F1 hybrid viability, vigour and sterility. The authors conclude by offering some future research perspectives and highlight the potential of the Oryza sativa complex as a model system for the future study of speciation.


William Salter

William (Tam) Salter is a Postdoctoral Research Fellow in the School of Life and Environmental Sciences and Sydney Institute of Agriculture at the University of Sydney. He has a bachelor degree in Ecological Science (Hons) from the University of Edinburgh and a PhD in plant ecophysiology from the University of Sydney. Tam is interested in the identification and elucidation of plant traits that could be useful for ecosystem resilience and future food security under global environmental change. He is also very interested in effective scientific communication.

Read this in your language

The Week in Botany

On Monday mornings we send out a newsletter of the links that have been catching the attention of our readers on Twitter and beyond. You can sign up to receive it below.

@BotanyOne on Mastodon

Loading Mastodon feed...