The Value of Nonmodel Genomes and an Example Using SynMap Within CoGe to Dissect the Hexaploidy that Predates the Rosids

The Value of Nonmodel Genomes and an Example Using SynMap Within CoGe to Dissect the Hexaploidy... We find great value in the genomes from the nonmodel organisms papaya and grape. These genomes help us understand the chromosomal history of the super-order rosids. Essential to this process are new, online genomics tools that allow researchers to easily perform their own experiments, such as identifying and evaluating syntenic regions and estimating the degree of post-tetraploidy gene fractionation (diploidization); this process is exemplified here using the online comparative genomics toolset CoGe. Using case studies, we show that two of the three genomes within the rosid paleohexaploid are more fractionated with respect to one another than to a third genome. This indicates a shared history derived from a [tetraploid]-then-[wide cross to generate a triploid]-then-[whole genome duplication to generate the hexaploid,] or similar scenario involving unreduced gametes. Two alternative hypotheses are presented that differ in terms of the mechanism and timing of fractionation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Tropical Plant Biology Springer Journals

The Value of Nonmodel Genomes and an Example Using SynMap Within CoGe to Dissect the Hexaploidy that Predates the Rosids

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Publisher
Springer Journals
Copyright
Copyright © 2008 by Springer-Verlag
Subject
Life Sciences; Transgenics; Plant Ecology; Plant Breeding/Biotechnology; Plant Genetics & Genomics; Plant Sciences
ISSN
1935-9756
eISSN
1935-9764
D.O.I.
10.1007/s12042-008-9017-y
Publisher site
See Article on Publisher Site

Abstract

We find great value in the genomes from the nonmodel organisms papaya and grape. These genomes help us understand the chromosomal history of the super-order rosids. Essential to this process are new, online genomics tools that allow researchers to easily perform their own experiments, such as identifying and evaluating syntenic regions and estimating the degree of post-tetraploidy gene fractionation (diploidization); this process is exemplified here using the online comparative genomics toolset CoGe. Using case studies, we show that two of the three genomes within the rosid paleohexaploid are more fractionated with respect to one another than to a third genome. This indicates a shared history derived from a [tetraploid]-then-[wide cross to generate a triploid]-then-[whole genome duplication to generate the hexaploid,] or similar scenario involving unreduced gametes. Two alternative hypotheses are presented that differ in terms of the mechanism and timing of fractionation.

Journal

Tropical Plant BiologySpringer Journals

Published: Oct 4, 2008

References

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