The Genomics of Oryza Species Provides Insights into Rice Domestication and Heterosis
Authors
Annual Review of Plant Biology
Vol. 70:639-665 (Volume publication date April 2019)
https://doi.org/10.1146/annurev-arplant-050718-100320
Erwang Chen,1,2 Xuehui Huang,3 Zhixi Tian,4 Rod A. Wing,5 and Bin Han1
1National Center of Plant Gene Research; Shanghai Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences; and CAS Center of Excellence for Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200233, China; email: bhan@ncgr.ac.cn
2University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100049, China
3College of Life Sciences, Shanghai Normal University, Shanghai 200234, China; email: xhhuang@shnu.edu.cn
4State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
5Arizona Genomics Institute, School of Plant Sciences, University of Arizona, Tucson, Arizona 85721, USA; email: rwing@email.arizona.edu
Abstract
Here, we review recent progress in genetic and genomic studies of the diversity of Oryza species. In recent years, unlocking the genetic diversity of Oryza species has provided insights into the genomics of rice domestication, heterosis, and complex traits. Genome sequencing and analysis of numerous wild rice (Oryza rufipogon) and Asian cultivated rice (Oryza sativa) accessions have enabled the identification of genome-wide signatures of rice domestication and the unlocking of the origin of Asian cultivated rice. Moreover, similar studies on genome variations of African rice (Oryza glaberrima) cultivars and their closely related wild progenitor Oryza barthii accessions have provided strong evidence to support a theory of independent domestication in African rice. Integrated genomic approaches have efficiently investigated many heterotic loci in hybrid rice underlying yield heterosis advantages and revealed the genomic architecture of rice heterosis. We conclude that in-depth unlocking of genetic variations among Oryza species will further enhance rice breeding.
