UC Riverside Citrus Genome Project

CGD Accession: CGD23001

Authors:  Khushwant Singh, Tara Rickman, Jong-Wong Park, Matthew Huff, Jianyang Liu, Manjunath L. Keremane, Robert R. Krueger, Ping Zheng, Jodi Humann, Madhurababu Kunta, Margaret Staton, Chris Dardick, Mikeal Roose, Dorrie Main, Chandrika Ramadugu. Chromosome-scale, de novo, phased genome assemblies of three Australian limes, Citrus australasica, C. inodora, and C. glauca, towards finding insights into disease resistance to citrus huanglongbing. In preparation.

Project Information:  The authors have kindly provided this data pre-publication according to the Ft. Lauderdale Accord. By accessing these data, you agree not to publish any articles containing analyses of genes or genomic data on a whole genome or chromosome scale prior to publication by the authors and/or collaborators of a comprehensive genome analysis such as identification of complete (whole genome) sets of genomic features such as genes, gene families, regulatory elements, repeat structures, GC content, or any other genome feature, and whole-genome- or chromosome- scale comparisons with other species.  Bulk download of the assembly files will become available once the data is published.  If you would like access to the data prior to that, please contact the corresponding author directly (Chandrika Ramadugu, chandram@ucr.edu).

Funding: USDA NIFA  ECDRE #2019-70016-29068 and #2020-70029-33201

Citrus australasica CRC3672 genome v1

Taxonomy: Citrus australasica F. Muell. 

Synonyms: Microcitrus australasica (F. Muell.) Swingle; Microcitrus australasica (F. Muell.) Swingle var. australasica 

Cultivar: 'Australian finger lime'  

Accession IDs: IVNO 6502; CRC 3672; PI 312872

The sample was collected from a single tree (inventory identifier IVNO 6502, planted in 1987) in the Givaudan Citrus Variety Collection, University of California Riverside (UCR). The accession is identified as CRC 3672 in the UCR system and PI 312872 in the USDA National Plant Germplasm System (NPGS).  Seeds from this source tree were propagated and used for testing for field resistance/tolerance against citrus Huanglongbing (HLB) disease in an HLB endemic region of Florida, USA and found to be highly tolerant to the disease (Ramadugu et al., 2016).  This genotype has since been used to breed for HLB resistance in commercial citrus. USDA received this accession as seed in 1966 from L. Chilcott, North Arm Murwillumbah, New South Wales, Australia. It was received at UCR in 1968, most probably as small trees. A clone from this source was propagated and sanitized as VI 697 in 2004 at the Citrus Clonal Protection Program, UCR. Propagative and genetic material from this accession is available from the USDA National Clonal Germplasm Repository for Citrus and Dates, Riverside, California subject to phytosanitary regulations. 

C. australasica assembly metrics

Citrus glauca CRC3463 genome v1

Taxonomy: Citrus glauca (Lindl.) Burkill 

Synonyms: Eremocitrus glauca (Lindl.) Swingle

Cultivar: 'Australian desert lime'  

Accession IDs:  IVNO 6206; CRC 3463; PI 539717

The sample was collected from a single tree (inventory identifier IVNO 6206, planted in 1983) in the Givaudan Citrus Variety Collection, University of California Riverside (UCR). The accession is identified as CRC 3463 in the UCR system and PI 539717 in the USDA National Plant Germplasm System (NPGS).   Seeds from a related source (Eremocitrus glauca hybrid (Lindl.) Swingle, CRC 4105) were propagated and used for testing for field resistance/tolerance against citrus Huanglongbing (HLB) disease in an HLB endemic region of Florida, USA and found to be highly tolerant to the disease (Ramadugu et al., 2016). In subsequent experiments, C. glauca (CRC 3463) was also found to be highly tolerant to HLB (unpublished). A description of C. glauca is available here.  Propagative and genetic material from this accession is available from the USDA National Clonal Germplasm Repository for Citrus and Dates, Riverside, California subject to phytosanitary regulations. Note: this accession has not been sanitized.

C. glauca assembly metrics

Citrus inodora CRC3784 genome v1.0