Sequencing of Australian wild rice genomes reveals ancestral relationships with domesticated rice
Brozynska, Marta, Copetti, Dario, Furtado, Agnelo, Wing, Rod, Crayn, Darren, Fox, Glen, Ishikawa, Ryuji, and Henry, Robert J. (2016) Sequencing of Australian wild rice genomes reveals ancestral relationships with domesticated rice. Plant Biotechnology Journal, 15 (6). pp. 765-774.
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Abstract
The related A genome species of the Oryza genus are the effective gene pool for rice. Here we report draft genomes for two Australian wild A genome taxa: O. rufipogon-like population, referred to as Taxon A and O. meridionalis-like population, referred to as Taxon B. These two taxa were sequenced and assembled by integration of short and long read next generation sequencing (NGS) data to create a genomic platform for a wider rice gene pool. Here we report that, despite the distinct chloroplast genome, the nuclear genome of the Australian Taxon A, has a sequence that is much closer to that of domesticated rice (O. sativa) than to the other Australian wild populations. Analysis of 4,643 genes in the A genome clade showed that the Australian annual, O. meridionalis, and related perennial taxa have the most divergent (around 3 million years) genome sequences relative to domesticated rice. A test for admixture showed possible introgression into the Australian Taxa A (diverged around 1.6 million years ago) especially from the wild indica/O. nivara clade in Asia. These results demonstrate that northern Australia may be the centre of diversity of the A genome Oryza and suggest the possibility that this might also be the centre of origin of this group and represent an important resource for rice improvement.
| Item ID: | 46903 |
|---|---|
| Item Type: | Article (Research - C1) |
| ISSN: | 1467-7652 |
| Additional Information: | Plant Biotechnology Journal published by Society for Experimental Biology and The Association of Applied Biologists and John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
| Date Deposited: | 05 Jun 2017 03:55 |
| FoR Codes: | 31 BIOLOGICAL SCIENCES > 3104 Evolutionary biology > 310410 Phylogeny and comparative analysis @ 50% 31 BIOLOGICAL SCIENCES > 3104 Evolutionary biology > 310411 Plant and fungus systematics and taxonomy @ 50% |
| SEO Codes: | 82 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 8204 Summer Grains and Oilseeds > 820402 Rice @ 40% 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960803 Documentation of Undescribed Flora and Fauna @ 40% 97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 20% |
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