Tomato’s Genome Sequence Finally Cracked!

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Though science has still not replied to the eternal question of whether tomato is a fruit or a vegetable, it has stepped closer to answering it. The full genome sequence of tomato has been discovered by an international team of scientists, working across nationalities. Not only has the team cracked the genetic code of cultivated tomato but also that of the wild variety. It is being hoped that this development would help farmers grow tastier and more nutritious varieties of tomatoes in the future.

1) The Genetic Code

The full genome sequence of tomato, Solanum lycopersicum, has been named “Heinz 1706” and it has been published in the science journal “Nature.” Describing the details of the genetic code, the scientists said that all the 35,000 genes of tomato are well displayed in this sequence along with their functional parts, orientation, types, and relative positions. The researchers found that the tomatoes were made up of about 35,000 genes, arranged on 12 chromosomes and each of those genes is responsible for any characteristic that tomato shows. The “Nature” article describes the genetic results, “The tomato genome sequence provides insights into fleshy fruit evolution.” Apart from the domesticated or cultivated tomato, the researchers have also been able to crack the genetic sequence of its wild relative Solanum pimpinellifolium. James Giovannoni, who works at the “Boyce Thompson Institute for Plant Research at Cornell University," shows his excitement through words, “For any characteristic of the tomato, whether it’s taste, natural pest resistance or nutritional content, we’ve captured virtually all those genes.” Giovannoni further adds, “Tomato genetics underlies the potential for improved taste every home gardener knows and every supermarket shopper desires and the genome sequence will help solve this and many other issues in tomato production and quality.”

2) The Significance

In the US alone, tomatoes are worth $2 billion pie of the market share and Britain dabbles in $980 million worth of tomato business a year. In the rest of the world too, tomatoes are an inherent part of daily diet in all forms. Therefore, their consumption depends, to a large extent, on their quality. It is no wonder then that the scientists are excited about the possibilities arising out of knowing tomato’s genetic code. One of the main benefits would be for the researchers to identify links between tomato genes and the characteristics like taste, shape, color and nutrition level shown by various tomatoes. The scientists will also be able to pinpoint the specific environmental factors that enhance or affect the overall health of tomato crops. Graham Seymour, a member of the scientific team working on this project, and a professor of biotechnology at the “Nottingham University”, explains, “Tomatoes are one of the most important fruit crops in the world, both in terms of the volume that we eat and the vitamins, minerals and other phytochemicals that both fresh and processed tomato products provide to our diets.”

3) The Team

It was an international collaboration between more than a dozen countries that was named the “Tomato Genomics Consortium” and was entrusted with the responsibility to identify the genetic sequence of this popular fruit/vegetable of the world. The researchers, who were members of this Consortium, belonged to various nationalities, such as Argentina, Germany, China, France, India, Israel, the Netherlands, South Korea, Italy, Spain, Belgium, Japan, United Kingdom, and the US.

4) The Future

It took the international Consortium many years and millions of dollars to find out the first genome sequence in case of tomato. However, the scientists are hopeful that further studies in this direction would yield results at a much less cost because they will have initial findings to work with. Besides, buoyed by the tomato findings, scientists are also ready to work on fruits like strawberries, apples, bananas, etc to identify their genome sequence and work for their improvement too. As Giovannoni explains, “Now we can start asking a lot more interesting questions about fruit biology, disease resistance, root development and nutritional qualities.”

Tomato has many health benefits, especially when eaten raw. Now armed with the genetic information, it is going to be much easier for the scientists to provide significant inputs to the farmers to grow better varieties of tomatoes as well as other fruits and vegetables. As for that cup of salsa, it is gonna get better now!

Image Courtesy: malcolmallison.lamula.pe, ifood.tv

Read more at http://www.ifood.tv/blog/tomato-s-genome-sequence-finally-cracked#0p0AgEfPPI8EqMFi.99

Tomato Genome Decoded: Researchers To Publish Fruit's DNA Sequence In Full

By: Jennifer Welsh, LiveScience Staff Writer
Published: 05/30/2012 01:07 PM EDT on LiveScience
For years scientists have slaved away, trying to piece together the genes that make up the ripe, red goodness that is the tomato. They have finally published the fleshy fruit's genome in full.
The genome of any species is the DNA code that is stored as a blueprint inside every cell of every individual of that species. The DNA letters, called base pairs, are organized into genes, which are translated into proteins, the building blocks and machinery of every cell.
Decoding these genes can help researchers understand the different types of proteins found in organisms, and how these proteins make that species different from every other species. These kinds of insights from the genome could help crop researchers improve the yield, nutritional content, disease resistance, taste and color of tomatoes, they say.
"For any characteristic of the tomato, whether it's taste, natural pest resistance or nutritional content, we've captured virtually all those genes," study researcher James Giovannoni, of Cornell University, said in a statement. "Tomato genetics underlies the potential for improved taste every home gardener knows and every supermarket shopper desires and the genome sequence will help solve this and many other issues in tomato production and quality."
Generic and wild genomes
The researchers sequenced the genome of the tomato species Solanum lycopersicum, of the variety "Heinz 1706," as their type tomato. These tomatoes possess some 35,000 genes arranged on 12 chromosomes (large arrangements of hundreds of genes packed into one strand), the researchers said.

The researchers also sequenced the garden tomato's wild ancestor, Solanum Pimpinellifolium.
Knowing the sequence of one tomato can help seed companies and plant breeders get a grasp on what makes different varieties, like heirloom tomatoes, different from the generic grocery tomato.
Because the variability between two varieties is pretty small, it's easier to use the Heinz 1706 genome as a guide, and pinpoint the differences that lead to changes in color, taste, texture, size and shapethat distinguish one variety from another.
Tomato vs. potato
The genome is also important in learning why the tomato is so different from its genetic relatives in the nightshade family of flowering plants, which includes the potato, pepper and even coffee. Scientists want to know what genes have changed that gives each of these species their distinct flavor and look.
"Now we can start asking a lot more interesting questions about fruit biology, disease resistance, root development and nutritional qualities," Giovannoni said.
Tomatoes represent a $2 billion market in the United States alone. The USDA estimates that Americans consume, on average, more than 72 pounds (33 kilograms) of tomato products annually. Researchers have even developed a robot tomato harvester to go into space (or just use here on Earth).

The tomato decoded: holds more genes than humans

The tomato has always been a complex fruit. Or is it a vegetable? Either way. Tomato, tomahto, right?
The tomato, which is considered a fruit by botanists and a vegetable to the US government, has been demystified by a consortium of plant geneticists from 14 countries who spent nine years decoding the tomato genome with the hopes of breeding better, tastier fruits.
Specifically, the scientists sequenced the genomes of both Heinz 1706, a variety used to make ketchup, and the tomato’s closest wild relative, Solanum pimpinellifolium, which is grown in Peru, according to The New York Times.
The researchers reported that tomatoes possess some 35,000 genes arranged on 12 chromosomes. "For any characteristic of the tomato, whether it's taste, natural pest resistance or nutritional content, we've captured virtually all those genes," James Giovannoni, a scientist at the Boyce Thompson Institute for Plant Research, told Phys.org