The International Oryza Map Alignment Project: development of a genus-wide comparative genomics platform to help solve the 9 billion-people question.

The wild relatives of rice contain a virtually untapped reservoir of traits that can be used help drive the 21st century green revolution aimed at solving world food security issues by 2050. To better understand and exploit the 23 species of the Oryza genus the rice research community is developing foundational resources composed of: 1) reference genomes and transcriptomes for all 23 species; 2) advanced mapping populations for functional and breeding studies; and 3) in situ conservation sites for ecological, evolutionary and population genomics. To this end, 16 genome sequencing projects are currently underway, and all completed assemblies have been annotated; and several advanced mapping populations have been developed, and more will be generated, mapped, and phenotyped, to uncover useful alleles. As wild Oryza populations are threatened by human activity and climate change, we also discuss the urgent need for sustainable in situ conservation of the genus.

[1]  Multiparent intercross populations in analysis of quantitative traits , 2012, Journal of Genetics.

[2]  W. Powell,et al.  From mutations to MAGIC: resources for gene discovery, validation and delivery in crop plants. , 2008, Current opinion in plant biology.

[3]  L. Tang,et al.  Phylogeny and biogeography of the rice tribe (Oryzeae): evidence from combined analysis of 20 chloroplast fragments. , 2010, Molecular phylogenetics and evolution.

[4]  L. Stein,et al.  Rice structural variation: a comparative analysis of structural variation between rice and three of its closest relatives in the genus Oryza. , 2010, The Plant journal : for cell and molecular biology.

[5]  A. Jarvis,et al.  A global approach to crop wild relative conservation: securing the gene pool for food and agriculture , 2010, Kew Bulletin.

[6]  M. Lorieux,et al.  Identification of a Rice stripe necrosis virus resistance locus and yield component QTLs using Oryza sativa × O. glaberrima introgression lines , 2010, BMC Plant Biology.

[7]  S. Jackson,et al.  Doubling genome size without polyploidization: dynamics of retrotransposition-driven genomic expansions in Oryza australiensis, a wild relative of rice. , 2006, Genome research.

[8]  R. Berloo GGT 2.0: Versatile Software for Visualization and Analysis of Genetic Data , 2008 .

[9]  P. Lindhout,et al.  The development of lettuce backcross inbred lines (BILs) for exploitation of the Lactuca saligna (wild lettuce) germplasm , 2004, Theoretical and Applied Genetics.

[10]  Comparative genetic structure within single-origin pairs of rice (Oryza sativa L.) landraces from in situ and ex situ conservation programs in Yunnan of China using microsatellite markers , 2012, Genetic Resources and Crop Evolution.

[11]  J. Keurentjes,et al.  Development of a Near-Isogenic Line Population of Arabidopsis thaliana and Comparison of Mapping Power With a Recombinant Inbred Line Population , 2007, Genetics.

[12]  Zuofeng Zhu,et al.  Development of Oryza rufipogon and O. sativa Introgression Lines and Assessment for Yield‐related Quantitative Trait Loci , 2007 .

[13]  R. Wing,et al.  Australian Oryza: Utility and Conservation , 2010, Rice.

[14]  Ya-long Guo,et al.  Molecular Phylogeny of Oryzeae (poaceae) Based on Dna Sequences from Chloroplast, Mitochondrial, and Nuclear Genomes Ya-long Guo 2 and Song Ge , 2022 .

[15]  P. Xu,et al.  QTL analysis for hybrid sterility and plant height in interspecific populations derived from a wild rice relative, Oryza longistaminata , 2009 .

[16]  M. Lorieux,et al.  Chromosome Segment Substitution Lines: A Powerful Tool for the Introgression of Valuable Genes from Oryza Wild Species into Cultivated Rice (O. sativa) , 2010, Rice.

[17]  D. Vaughan The wild relatives of rice: a genetic resources handbook. , 1994 .

[18]  C. Brondani,et al.  Agronomic and molecular characterization of introgression lines from the interspecific cross Oryza sativa (BG90-2) x Oryza glumaepatula (RS-16). , 2008, Genetics and molecular research : GMR.

[19]  K. Doi,et al.  Independent evolution of a new allele of F1 pollen sterility gene S27 encoding mitochondrial ribosomal protein L27 in Oryza nivara , 2011, Theoretical and Applied Genetics.

[20]  Qifa Zhang Strategies for developing Green Super Rice , 2007, Proceedings of the National Academy of Sciences.

[21]  S. Jackson,et al.  Evolutionary dynamics of an ancient retrotransposon family provides insights into evolution of genome size in the genus Oryza. , 2007, The Plant journal : for cell and molecular biology.

[22]  Marco C.S. Wopereis,et al.  Drought resistance in an interspecific backcross population of rice (Oryza spp.) derived from the cross WAB56-104 (O. sativa) × CG14 (O. glaberrima) , 2010 .

[23]  M. McMullen,et al.  Genetic Design and Statistical Power of Nested Association Mapping in Maize , 2008, Genetics.

[24]  N. Kurata,et al.  The wild Oryza collection in National BioResource Project (NBRP) of Japan: History, biodiversity and utility , 2010 .

[25]  Lei Wang,et al.  Identification of quantitative trait loci for resistance to whitebacked planthopper, Sogatella furcifera, from an interspecific cross Oryza sativa × O. rufipogon , 2010 .

[26]  Huanming Yang,et al.  A Draft Sequence of the Rice Genome (Oryza sativa L. ssp. indica) , 2002, Science.

[27]  Inventory of related wild species of priority crops in Venezuela , 2012, Genetic Resources and Crop Evolution.

[28]  R. Ishikawa,et al.  Development of backcross recombinant inbred lines between Oryza sativa Nipponbare and O. rufipogon and QTL detection on drought tolerance , 2011 .

[29]  Xing Wang Deng,et al.  Rice 2020: a call for an international coordinated effort in rice functional genomics. , 2008, Molecular plant.

[30]  J. Bennetzen,et al.  Dynamic Evolution of Oryza Genomes Is Revealed by Comparative Genomic Analysis of a Genus-Wide Vertical Data Set[W][OA] , 2008, The Plant Cell Online.

[31]  J. Zhuang,et al.  Genetic diversity associated with conservation of endangered Dongxiang wild rice (Oryza rufipogon) , 2010, Genetic Resources and Crop Evolution.

[32]  J. Bennetzen,et al.  Spatio-temporal patterns of genome evolution in allotetraploid species of the genus Oryza. , 2010, The Plant journal : for cell and molecular biology.

[33]  S. Jackson,et al.  The Oryza BAC resource : a genus-wide and genome scale tool for exploring rice genome evolution and leveraging useful genetic diversity from wild relatives , 2010 .

[34]  Qian Qian,et al.  Genome-wide association study of flowering time and grain yield traits in a worldwide collection of rice germplasm , 2011, Nature Genetics.

[35]  M. Yano,et al.  Germplasm enhancement by developing advanced plant materials from diverse rice accessions , 2010 .

[36]  E. Buckler,et al.  Structure of linkage disequilibrium in plants. , 2003, Annual review of plant biology.

[37]  V. Tonapi,et al.  Cultivated Grasses and their Wild Relatives in Andhra Pradesh and Their Conservation Concerns , 2012 .

[38]  李佩芳 International Rice Genome Sequencing Project. 2005. The map-based sequence of the rice genome. , 2005 .

[39]  M. Lorieux,et al.  Agro-morphological characterization of a population of introgression lines derived from crosses between IR 64 (Oryza sativa indica) and TOG 5681 (Oryza glaberrima) for drought tolerance. , 2012, Plant science : an international journal of experimental plant biology.

[40]  G. S. Mangat,et al.  Development of high yielding IR64 × Oryza rufipogon (Griff.) introgression lines and identification of introgressed alien chromosome segments using SSR markers , 2008, Euphytica.

[41]  Melanie A. Huntley,et al.  Evolution of genes and genomes on the Drosophila phylogeny , 2007, Nature.

[42]  J. Jin,et al.  Fine mapping of Spr3, a locus for spreading panicle from African cultivated rice (Oryza glaberrima Steud.). , 2008, Molecular plant.

[43]  Jinhua Xiao,et al.  Through the genetic bottleneck: O. rufipogon as a source of trait-enhancing alleles for O. sativa , 2007, Euphytica.

[44]  Min Shi,et al.  Fine mapping and candidate gene analysis of spd 6 , responsible for small panicle and dwarfness in wild rice ( Oryza rufipogon , 2009 .

[45]  Y. Kim,et al.  Fine mapping of a yield-enhancing QTL cluster associated with transgressive variation in an Oryza sativa × O. rufipogon cross , 2008, Theoretical and Applied Genetics.

[46]  Chenwu Xu,et al.  Developing high throughput genotyped chromosome segment substitution lines based on population whole-genome re-sequencing in rice (Oryza sativa L.) , 2010, BMC Genomics.

[47]  S. Robinson,et al.  Food Security: The Challenge of Feeding 9 Billion People , 2010, Science.

[48]  S. Jackson,et al.  The Oryza bacterial artificial chromosome library resource: construction and analysis of 12 deep-coverage large-insert BAC libraries that represent the 10 genome types of the genus Oryza. , 2005, Genome research.

[49]  Haibao Tang,et al.  Comparative inference of illegitimate recombination between rice and sorghum duplicated genes produced by polyploidization. , 2009, Genome research.

[50]  Mark Yandell,et al.  MAKER2: an annotation pipeline and genome-database management tool for second-generation genome projects , 2011, BMC Bioinformatics.

[51]  A. Oliphant,et al.  A draft sequence of the rice genome (Oryza sativa L. ssp. japonica). , 2002, Science.

[52]  L. Stein,et al.  Construction, alignment and analysis of twelve framework physical maps that represent the ten genome types of the genus Oryza , 2008, Genome Biology.

[53]  S. Mccouch,et al.  Dissection of a QTL reveals an adaptive, interacting gene complex associated with transgressive variation for flowering time in rice , 2010, Theoretical and Applied Genetics.

[54]  E. Veasey,et al.  Genetic diversity of American wild rice species , 2011 .

[55]  R. Wisser,et al.  Use of an Advanced Intercross Line Population for Precise Mapping of Quantitative Trait Loci for Gray Leaf Spot Resistance in Maize , 2008 .

[56]  Kotaro Miura,et al.  The hybrid breakdown 1(t) locus induces interspecific hybrid breakdown between rice Oryza sativa cv. Koshihikari and its wild relative O. nivara , 2008 .

[57]  V. T. Nguyen,et al.  Crop Wild Relatives—Undervalued, Underutilized and under Threat? , 2011 .

[58]  A. Fujiyama,et al.  A map of rice genome variation reveals the origin of cultivated rice , 2012, Nature.

[59]  Takuji Sasaki,et al.  The map-based sequence of the rice genome , 2005, Nature.

[60]  K. Kadowaki,et al.  Diversity in the Oryza genus. , 2003, Current opinion in plant biology.

[61]  H. Cai,et al.  Analysis of QTLs for yield-related traits in Yuanjiang common wild rice (Oryza rufipogon Griff.). , 2010, Journal of genetics and genomics = Yi chuan xue bao.