The Genomics ofOryzaSpecies Provides Insights into Rice Domestication and Heterosis

Author:

Chen Erwang12,Huang Xuehui3,Tian Zhixi4,Wing Rod A.5,Han Bin1

Affiliation:

1. National 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;

2. University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100049, China

3. College of Life Sciences, Shanghai Normal University, Shanghai 200234, China;

4. State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China

5. Arizona Genomics Institute, School of Plant Sciences, University of Arizona, Tucson, Arizona 85721, USA;

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.

Publisher

Annual Reviews

Subject

Cell Biology,Plant Science,Molecular Biology,Physiology

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