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Full NameArachis ipaensis
Infraspecific Rank
Infraspecific Name
Common NameArachis ipaensis
Summary of genome assembly project

Arachis ipaensis GBrowse genome browser
Arachis ipaensis JBrowse genome browser
Download the Arachis ipaensis genome assembly, Araip1.0
Genome Assembly at NCBI
Gramene Plant Reactome

A. ipaensis, native to Bolivia, is thought to be one of the diploid ancestors of cultivated peanut. The genome of A. ipaensis, K30076 (PI 468322) has been sequenced as part of the Peanut Genomics Initiative, to help in the accurate assembly of the tetraploid domestic peanut, A. hypogaea.

Cultivated peanut derived all of its genetic material from two wild ancestors, A. duranensis and A. ipaensis whose genomes merged several thousand years ago, in a rare genetic event. The wild species, therefore, have half as much genetic material as cultivated peanut. These two “simpler” genomes have first been sequenced toward achieving its ultimate goal: the complete genomic sequence for cultivated peanut.
Distribution of some A. ipaensis collections on a world map.

The cultivated peanut is an allotetraploid (2n=4x=40) that carries both the A and B genomes and A. ipaensis (2n=2x=20) has likely contributed the B genome, the larger set of chromosomes in the karyotype. These two ancestral diploids separated from each other about 3 million years ago. The genome merger, allopolyploidy event, ocurred relatively very recently, five to ten thousand years ago, followed by domestication in South America from where it appeared in most part of the world by 1600.

NOTE: chromosomal pseudomolecules for A. duranensis and A. ipaensis were numbered according to previously published linkage maps; they mostly do not have known correspondences to cytogenetic numbers. Known correspondences are: cytogenetic A9 = Aradu.A08 and cytogenetic B3 = Araip.B06

More about Arachis ... (Download a short review on 'Arachis duranensis, Arachis ipaensis, and the Origins of Cultivated Peanut')

More information at:
Encyclopedia of Life
Germplasm accessions are available at ICRISAT via Genesys (Gateway to Genetic Resources).
Image Source: Plant Breeding, Genetics, and Genomics (PBGG) Graduate Student Association (GSA) at the University of Georgia
Feature Summary
The following features are currently present for this organism
Feature TypeCount
This organism is associated with 2 stock(s):
PI 468322Accession
Genome Sequence
Project Name
Project DescriptionArachis ipaensis is a wild annual plant native to Bolivia. It is thought to be one of the diploid ancestors of cultivated tetraploid peanut. Arachis ipaensis accession K30076 was sequenced at Beijing Genomics Institute, with funding from The Peanut Foundation, as part of the International Peanut Genome Initiative. The sequencing stragety was whole-genome shotgun, from eight Illumina paired-end sequencing libraries, with insert sizes ranging from 170 bp to 40 kb. The primary contig and scaffold assemblies were constructed using SOAPdenovo (v2.04). Additional scaffolding was conducted using the SSPACE software.
ConsortiumThe International Peanut Genome Initiative
Sample Data
Stock NameK30076
Sample DescriptionGermplasm collection site: ARGENTINA, Salta, Prov. Salta, Argentina species described by Krapov. and W. C. Gregory accession maintained in Active Germplasm Bank of Embrapa Genetic Resources and Biotechnology (Cenargen, Brasilia, Brazil) by Jose FM Valls accession multiplied and DNA supplied by Soraya and David Bertioli
Assembly Data
Assembly Namearaip.K30076.gnm1