Order: Fagales
Family: Juglandaceae
Chromosome Number: 2n=32
Draft Genome Sequence
David Neale and Charles Langley (UC Davis) worked with the California Walnut Board to sequence the walnut genome, currently released as v2.0. A manuscript is expected soon. Links:
Reference Genome V2
The newest version of the J. regia genome, available for download. Annotation coming soon.
Publication:
Coming soon.
Reference Genome V1.5
Stevens et al. produced draft genomes for Juglans regia, five additional Juglans species (J. nigra, J. sigillata, J. microcarpa, J. catheyensis, and J. hindsii) and the related species Pterocarya stenoptera. This J. regia assembly is not annotated and is available for download only.
Publication:
Stevens KA, Woeste K, Chakraborty S, Crepeau MW, Leslie CA, Martínez-García PJ, Puiu D, Romero-Severson J, Coggeshall M, Dandekar AM, Kluepfel D, Neale DB, Salzberg SL, Langley CH. Genomic Variation Among and Within Six Juglans Species. G3 (Bethesda). 2018 May 23. pii: g3.200030.2018. doi: 10.1534/g3.118.200030.
Reference Genome V1
The original, fully annotated reference genome for J. regia from Martínez‐García et al. All searchable genes currently come from this version. Available for searching, downloading, browsing and BLAST.
Publication:
Martínez‐García PJ, Crepeau MW, Puiu D, Gonzalez‐Ibeas D, Whalen J, Stevens KA, Paul R, Butterfield TS, Britton MT, Reagan RL, Chakraborty S. The walnut (Juglans regia) genome sequence reveals diversity in genes coding for the biosynthesis of nonstructural polyphenols. The Plant Journal. 2016 May 1.
Genetic and Physical Map
Publication:
Luo MC, You FM, Li P, Wang JR, Zhu T, Dandekar AM, Leslie CA, Aradhya M, McGuire PE, Dvorak J. Synteny analysis in Rosids with a walnut physical map reveals slow genome evolution in long-lived woody perennials. BMC genomics. 2015 Sep 17;16(1):1.
Quantitative phenotyping of shell suture strength in walnut (Juglans regia L.) enhances precision for detection of QTL and genome-wide association mapping
This work describes a quantitative phenotyping method for measuring suture strength in walnut shells. Genetic analyses were performed including QTL mapping and genome-wide association mapping for walnut trees in the UC Davis walnut improvement program. More information and data are available for download.
