Navigation Links
Genome duplication responsible for more plant species than previously thought
Date:8/12/2009

ly tolerate the presence of even one extra chromosome out of the total set of 23. Most human "trisomies," as these are called, result in natural abortion, or miscarriage. Non-lethal human trisomies result in developmental disorders, such as Down Syndrome. Human zygotes with three full sets of chromosomes do not develop.

Plants are pretty special. Not only can many species tolerate extra chromosome sets, but polyploidy appears to be a recurring theme throughout plant evolution. The question is why.

"Recent data reveal evidence of polyploidy in an array of plants, like grapes, poplar trees, corn, and many others," Wood said. "In most of these cases the evidence points to ancient polyploid events. Some species of flowering plants have more than 400 chromosomes and some fern species more than 1,000 due to repeated instances of polyploidy during their evolution. While these examples might seem remarkable, given the high frequency of polyploidy speciation documented here, the bigger surprise would be if plant lineages were found in which polyploidy was absent."

One implication of the PNAS paper is that Wood, Rieseberg, and their coauthors may be getting close to solving the mystery. If extra genomes provide no special advantage over relatives, the ubiquity of polyploidy in plants could simply be because polyploid mutants are commonly produced. Evolutionary change that doesn't involve the plus-or-minus forces of natural selection is called "neutral" in evolutionary biology parlance.

"I really thought we would find evidence that polyploids have an advantage," Wood said. "The idea that the large number of polyploid species and the attending high chromosome numbers might be simply due to a neutral process is intriguing."


'/>"/>

Contact: David Bricker
brickerd@indiana.edu
812-856-9035
Indiana University
Source:Eurekalert  

0

GOOD

Page: 1 2 3

Related biology news :

1. Unravelling new complexity in the genome
2. Conquest of land began in shark genome
3. One species entire genome discovered inside anothers
4. Genome study shines light on genetic link to height
5. First individual genome sequence published
6. Ultraconserved elements in the genome: Are they indispensable?
7. $10 million gift to support cutting-edge epigenome center at USC
8. Fungus genome yielding answers to protect grains, people and animals
9. Which came first, the chicken genome or the egg genome?
10. Researchers expand efforts to explore functional landscape of the human genome
11. Genome update defines landscape of breast and colon cancers
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Genome duplication responsible for more plant species than previously thought
(Date:5/20/2013)... of Minnesota Medical School researchers from the Masonic Cancer ... Brain Tumor Program, have developed a new mouse model ... them to discover new genes and gene pathways driving ... this week in the journal Nature Genetics . ... the lab of David Largaespada, Ph.D., professor in the ...
(Date:5/20/2013)... COLUMBUS, Ohio New research suggests that a compound ... "superpower" to escape death. , By altering a ... re-educates cancer cells into normal cells that die as ... by inhibiting a process that would cause them to ... strict programming. This study in cells, led by Ohio ...
(Date:5/20/2013)... conducted at the University of Bristol and published online ... sheds light on how the brain and inner ear ... School of Earth Sciences, together with Tom Hbner from ... of 150 million year old dinosaurs. , The two ... Dysalotosaurus lettowvorbecki : a very young (juvenile) individual ...
Breaking Biology News(10 mins):U of M researchers develop model for better testing, targeting of MPNST 2The compound in the Mediterranean diet that makes cancer cells 'mortal' 2The compound in the Mediterranean diet that makes cancer cells 'mortal' 3Fossil brain teaser 2
... invites you to attend its first workshop on male ... clinical practice". The workshop provides a forum ... discuss new developments. Here some of the ... outside of Europe will announce: Nature ...
... ,The American Association of Pharmaceutical Scientists (AAPS) is ... employed in industry, academia, government and other research ... dynamic international forum for the exchange of knowledge ... health. AAPS offers timely scientific programs, on-going education, ...
... 2009 / b3c newswire / - PlatformQ , ... the healthcare, education and energy markets, and LabRoots ... scientific community, today announced the initial slate of speakers ... is the first of its kind online-only conference for ...
Cached Biology News:AAPS and PhRMA co-sponsor stability workshop 2BioConference Live Attracts Major Life Science Sponsors 2BioConference Live Attracts Major Life Science Sponsors 3
(Date:5/21/2013)... , May 21, 2013  Personal Genome Diagnostics ... its proprietary methodologies and expertise in genomic analysis ... targets in collaboration with Blueprint Medicines.  PGDx is ... identifying genomic alterations in tumors, and Blueprint Medicines ... inhibitors for a genetically defined patient population. ...
(Date:5/21/2013)... MN (PRWEB) May 21, 2013 Revolutionary ... patented automatic colony counter, announced today that they have ... products , the IncuCount, IntelliCount, InCount and ImpressCount. ... and sophistication are especially useful in food microbiology and ... given an updated look. A bright white enclosure ...
(Date:5/21/2013)... Ontario (PRWEB) May 21, 2013 ... scientists of the ITN to design the study, ... of two key clinical models used in the ... (EEC) and Nasal Allergen Challenge (NAC) models. Although ... by numerous publications, to date no direct comparison ...
(Date:5/21/2013)... 2013 Possible mold re-infestation in Guilemtte School ... a report from eagletribune.com posted May 14, 2013, the state ... result is positive, My Cleaning Products offered a tip ... , It was said in the Eagle Tribune report (5.14.13) ... campus sparked after a first-grade classroom was closed due to ...
Breaking Biology Technology:Personal Genome Diagnostics And Blueprint Medicines Form Collaboration to Identify Novel Kinase Targets 2Personal Genome Diagnostics And Blueprint Medicines Form Collaboration to Identify Novel Kinase Targets 3Revolutionary Science Announces New Automatic and Manual Colony Counting Products 2Inflamax Research selected by the Immune Tolerance Network and the National Institutes of Health to conduct a landmark clinical study on the underlying mechanisms of allergic inflammation. 2Possible Mold Re-infestation Gets Guilmette School Scheduled for Re-inspection, My Cleaning Products Offers Tip How to Kill Mold Safely If Inspection Turns Positive 2Possible Mold Re-infestation Gets Guilmette School Scheduled for Re-inspection, My Cleaning Products Offers Tip How to Kill Mold Safely If Inspection Turns Positive 3
... Ill., May 3, 2011 Landauer, Inc. (NYSE: ... and environmental radiation monitoring and the leading domestic provider of ... fiscal 2011 second quarter ended March 31, 2011.   ... grew 2 percent to $32.3 million on contribution from Medical ...
... Answering the need for global, site-focused enrollment support, ... enrollment industry, announces the expansion of its services to ... site-centric level. "The extension of our worldwide ... to assist sponsors with their global patient enrollment needs," ...
... Corporation (NASDAQ: TECH ) (Techne) announced today ... Limited and subsidiaries (Tocris), a leading supplier of reagents ... in both in-vitro and in-vivo experiments, to understand biological ... biologically active neuro- and bio-chemicals which are used by ...
Cached Biology Technology:Landauer, Inc. Reports Fiscal 2011 Second Quarter Results 2Landauer, Inc. Reports Fiscal 2011 Second Quarter Results 3Landauer, Inc. Reports Fiscal 2011 Second Quarter Results 4Landauer, Inc. Reports Fiscal 2011 Second Quarter Results 5Landauer, Inc. Reports Fiscal 2011 Second Quarter Results 6Landauer, Inc. Reports Fiscal 2011 Second Quarter Results 7Landauer, Inc. Reports Fiscal 2011 Second Quarter Results 8Landauer, Inc. Reports Fiscal 2011 Second Quarter Results 9Landauer, Inc. Reports Fiscal 2011 Second Quarter Results 10Landauer, Inc. Reports Fiscal 2011 Second Quarter Results 11Landauer, Inc. Reports Fiscal 2011 Second Quarter Results 12Clinical Site Services Expands to Provide Global Patient Enrollment Services to Rest-of-World 2Techne Corporation Announces Acquisition 2Techne Corporation Announces Acquisition 3Techne Corporation Announces Acquisition 4Techne Corporation Announces Acquisition 5