---
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date: '2016-06-28T00:00:00+00:00'
date_updated: '2025-12-06T10:33:46+00:00'
guid: http://blogs.biomedcentral.com/gigablog/?p=1781
identifier: https://doi.org/10.59350/e2c0t-bfd32
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keywords:
- Biology
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- Genome
- Genomics
- Olive
lang: en
license: https://creativecommons.org/licenses/by/4.0/legalcode
rid: 2d7ah-d9y89
rights: https://creativecommons.org/licenses/by/4.0/legalcode
summary: <em> Teams of scientists from Spain have published the first complete genome
  of the olive tree. The specimen sequenced is of the Spanish Farga variety, and is
  over 1,200 years old. </em>
title: 'Decoding The Tree of Life: Olive joins the Genome Club'
url: https://wayback.archive-it.org/22098/2025-05-01T17:13:42Z/http://gigasciencejournal.com/blog/decoding-the-tree-of-life-olive-genome
version: v1
---

*Teams of scientists from Spain have published the first complete genome
of the olive tree. The specimen sequenced is of the Spanish Farga
variety, and is over 1,200 years old. This work will facilitate genetic
improvement for production of olives and olive oil, two key products in
the Mediterranean economy and diet.*

**Adding oil to the agricultural genomics revolution.**\
The olive was one of the first trees to be domesticated, roughly some
6,000 years ago. And the production of olive oil, has been documented
since \~2500 BC, and was used for variety of purposes, including lamp
fuel, pharmaceuticals and ritual ointments.

Despite its long history and vital economic importance, up to now the
olive tree has not been part of the growing club of plant species that
have their genetic code determined. Understanding its genetic
instructions in this manner assists us in understanding such factors as
the differences among varieties, sizes and flavour of the olives, why
the trees live so long or the reasons for their adaptation to dryland
farming. Other than massive difficult-to-assemble genomes such as wheat,
a large proportion of all the major agricultural crops have had their
genomes sequenced, published, and in many cases sequenced again using
newer long-read technologies to make better quality references.

A Mediterranean emblem *par excellence*, the olive is of vital
importance to the economy of the region. Every year, nearly three
million tons of oil are produced for local consumption and export. Now a
team of researchers from the [Centre for Genomic Regulation
(CRG)](http://www.crg.eu/) of Barcelona the [Real Jardin Botánico
(CSIC-RJB)](http://www.rjb.csic.es/jardinbotanico/jardin/) and the
[Centro Nacional de Análisis Genómico
(CNAG-CRG)](http://www.cnag.crg.eu/), has brought new insight to the
genetic puzzle of the olive tree, by sequencing the complete genome of
this species. The results of this have just been published with us\*,\*
and pave the way to new research that will help olive trees in their
development and protecting them from [infections now causing major
damage](http://www.nature.com/news/gridlock-over-italy-s-olive-tree-deaths-starts-to-ease-1.19939),
such as the attacks of Olive Quick Decline Syndrome and Verticillium
wilt.

\"Without a doubt, it is an emblematic tree, and it is very difficult to
improve plant breeding, as you have to wait at least 12 years to see
what morphological characteristics it will have, and whether it is
advisable to cross-breed,\" says principal author of this paper Toni
Gabaldón, ICREA research professor and head of the comparative genomics
laboratory at the CRG. \"Knowing the genetic information of the olive
tree will let us contribute to the improvement of oil and olive
production, of major relevance to the Spanish economy,\" he adds.

\*\*Banking on open data. Private funding to support public science.\
\*\*Four years ago, Gabaldón worked with Pablo Vargas, a CSIC researcher
at the Real Jardín Botánico, on the presentation of scientific results
of projects focused on endangered species, such as the Iberian lynx,
that had been financed by Banco Santander. At that time, the bank had
expressed great interest in financing scientific projects in Spain. Over
the course of the presentation, Pablo Vargas proposed to Emilio Botín,
the late chairman of Santander, the complete sequencing of the olive
genome. A contract was signed to carry out the first complete sequencing
of the olive tree\'s DNA, a three-year research effort coordinated by
Vargas.

Taking the olive into the genome era, this has moved the study of this
ancient crop into the \"big-data\" arena. According to Tyler Alioto of
the CNAG-CRG \"this genome has generated some 1.31 billion letters, and
over 1,000 GBytes of data. We are surprised because we have detected
over 56,000 genes, significantly more than those detected in sequenced
genomes of related plants, and twice that of the human genome.\"

Despite the funding seeded from private means, to maximize its utility
for scientists and olive growers, the fruits of this project have been
made the public. All the sequences, transcriptomic data and results
being made open source and public domain through public repositories
[including our GigaDB database](http://dx.doi.org/10.5524/100201).

\*\*Elucidating the secrets of the tree of life.\
\*\*![](http://gigasciencejournal.com/blog/wp-content/uploads/2016/06/Santander_lowresol_compressed_01-300x213.png){.alignleft
.size-medium .wp-image-1783 loading="lazy" decoding="async"
srcset="http://gigasciencejournal.com/blog/wp-content/uploads/2016/06/Santander_lowresol_compressed_01-300x213.png 300w, http://gigasciencejournal.com/blog/wp-content/uploads/2016/06/Santander_lowresol_compressed_01.png 680w"
sizes="(max-width: 300px) 100vw, 300px" width="300" height="213"}While
olive oil market has boomed on the [supposed life extending
benefits](http://www.bbc.co.uk/programmes/articles/tWtLcz30LZm3YTk5VfZ307/is-olive-oil-really-good-for-me)
gained from the Mediterranean diet, the tree\'s themselves may also
provide some insights into the secrets of longevity. As well as the
history of human migration in the Mediterranean itself. The particular
specimen sequenced, named \'Santander\', was a 1,200 year old individual
of the Farga breed common in Eastern Spain (pictured here). In addition
to the complete sequencing of the olive genome, researchers have also
compared the DNA with other varieties such as the wild olive. They have
also found the transcriptome, the genes expressed to determine what
differences exist on the genetic expression level in leaves, roots and
fruits at different stages of ripening.

The next step, researchers say, will be to decode the evolutionary
history of this tree, which has formed part of old-world civilizations
since the Bronze Age. At that time, in the eastern Mediterranean, the
process of domesticating wild olive trees that led to today\'s trees
began. Later, selection processes in different Mediterranean countries
gave rise to the nearly 1,000 varieties of trees we have today.

Knowing the evolution of olive trees from different countries will make
it possible to know their origins and discover the keys that have
allowed it to adapt to very diverse environmental conditions. It will
also help discover the reasons behind its extraordinary longevity, as
the trees can live for 3,000 to 4,000 years.

\"That longevity makes the olive tree we have sequenced practically a
living monument,\" says Gabaldón. \"Up to now, all of the individuals
sequenced, from the fruit fly to the first human being analyzed, have
lived for a certain time, depending on their limited life expectancy.
This is the first time that the DNA of an individual over 1,000 years
old, and that will probably live another 1,300 years, has been
sequenced.\" say Gabaldón and Vargas.

\*\*Lubricating the wheels of precision agriculture.\
![](http://gigasciencejournal.com/blog/wp-content/uploads/2016/06/Screen-Shot-2016-06-28-at-12.05.36-300x171.png){.alignright
.size-medium .wp-image-1785 loading="lazy" decoding="async"
srcset="http://gigasciencejournal.com/blog/wp-content/uploads/2016/06/Screen-Shot-2016-06-28-at-12.05.36-300x171.png 300w, http://gigasciencejournal.com/blog/wp-content/uploads/2016/06/Screen-Shot-2016-06-28-at-12.05.36-768x438.png 768w, http://gigasciencejournal.com/blog/wp-content/uploads/2016/06/Screen-Shot-2016-06-28-at-12.05.36-1024x584.png 1024w, http://gigasciencejournal.com/blog/wp-content/uploads/2016/06/Screen-Shot-2016-06-28-at-12.05.36.png 1870w"
sizes="(max-width: 300px) 100vw, 300px" width="300" height="171"}\*\*The
publication of the rice genome over a decade ago has demonstrated the
advantages for agricultural of having a publicly available reference
genome. Rice research had a [measurable
boost](http://www.tandfonline.com/doi/full/10.1080/08109028.2011.631275)
in publications, QTLs and clones created, allowing it to overtake the
previously neck-and-neck field of wheat research, that still does not
have a public domain reference genome. Hopefully having an olive genome
will now allow olive research and breeding to follow a similar
trajectory.

While most of the recent focus in genomics has been focused on using it
in a clinical setting for \"precision medicine\", less attention has
been paid to where it is taking \"precision agriculture\". This should
be an equally urgent priority, with more than 1/8th of the world\'s
population living in extreme hunger and poverty, and the world
population estimated to reach 9.6 billion by 2050. There is a huge need
to create new resources to improve crop yield, reduce environmental
impact, and develop crops that are of high yield and nutrition and can
grow successfully in our increasingly stressed environments.

Rice has continued to show the the way ahead, with our [Rice3K
consortium
paper](http://gigascience.biomedcentral.com/articles/10.1186/2047-217X-3-7)
presenting 3,000 rice genomes and [13TB of sequence
quadrupling](http://blogs.biomedcentral.com/gigablog/2014/05/29/publish-data-fight-world-hunger/)
the amount of rice genomics data in the public domain. In the year since
this was published the processed data and results has grown a further
order of magnitude, with over 100TB currently available and [hosted as
public AWS
datasets](https://aws.amazon.com/public-data-sets/3000-rice-genome/).
Capitalizing on this data driven approach, breeders can now make full
use of these now genetically defined strains to develop and sustain the
most appropriate hybrid strains for different environments. There
remains, however, one additional component to achieve this goal:
information that allows researchers and breeders to directly link the
genotype to the phenotype (physical traits) of these different strains.
This is why on top of promoting dissemination of genetic information, we
are now trying to do the same for the second part of precision
agriculture: data from \"big-data\" phenotyping technologies such as
satellites and drones, imaging techniques, timelapse, morphometrics and
organ-scale phenomics. We recently launched our Plant Phenomics: Data
Integration and Analyses special series, and you can see more on this on
the [series
page](https://gigascience.biomedcentral.com/call-for-papers-plant-phenomics-data-integration-and-analyses)
and [recent guest
blog](http://blogs.biomedcentral.com/gigablog/2016/06/07/complexities-modern-plant-phenomics-guest-blog-plant-phenomics-series-guest-editors/)
from the editors. Please contact us if you have important plant genotype
and phenotype data you would like to disseminate in a similar manner.

![Plant phenomics postcard
image](http://gigasciencejournal.com/blog/wp-content/uploads/2016/06/Plant-phenomics-postcard-image.png){.aligncenter
.size-full .wp-image-1751 loading="lazy" decoding="async"
srcset="http://gigasciencejournal.com/blog/wp-content/uploads/2016/06/Plant-phenomics-postcard-image.png 538w, http://gigasciencejournal.com/blog/wp-content/uploads/2016/06/Plant-phenomics-postcard-image-300x168.png 300w"
sizes="(max-width: 538px) 100vw, 538px" width="538" height="302"}

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