Navigation Links
The equine Adam lived fairly recently: Close relationships among modern stallions
Date:4/4/2013

In mammals, an individual's sex is determined by the chromosomes it inherits from its parents. Two X chromosomes lead to a female, whereas one X and one Y lead to a male. Y chromosomes are only passed from fathers to sons, so each Y chromosome represents the male genealogy of the animal in question. In contrast, mitochondria are passed on by mothers to all their offspring. This means that an analysis of the genetic material or DNA of mitochondria can give information on the female ancestry. For the modern horse, it is well known that mitochondrial DNA is extremely diverse and this has been interpreted to mean that many ancestral female horses have passed their DNA on to modern horse breeds. Until recently, though, essentially no sequence diversity had been detected on the Y chromosome of the domestic horse. Not only does the lack of sequence markers on the Y chromosome make it impossible to trace male lineages with confidence, it also represents a scientific paradox. How can a species with so many female lines have so few male lines? The issue has now been addressed by Barbara Wallner and colleagues at the Institute of Animal Breeding and Genetics, University of Veterinary Medicine, Vienna (Vetmeduni Vienna).

Wallner initially selected seventeen horses from a range of European breeds. She pooled their DNAs and used modern sequencing technology to examine the level of diversity on a 200 kb portion of the Y chromosome she had previously sequenced. The Y chromosomes were found to be highly similar: only five positions turned out to be variable. As Wallner says, "the results confirmed what we had previously suspected: that the Y chromosomes of modern breeds of horse show far less variability than those of other domestic animals."

The five variable positions, or polymorphisms, were nevertheless sufficient to enable the researchers to derive a type of "family tree" for the various breeds of modern horse they investigated. An examinati
'/>"/>

Contact: Dr. Barbara Wallner
barbara.wallner@vetmeduni.ac.at
43-125-077-5627
University of Veterinary Medicine -- Vienna
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Stem cells could heal equine tendon injuries
2. HJF works with global team to develop equine vaccine against deadly hendra virus
3. Improving equine health: Research studies vaccinations to protect newborn foals
4. Earliest sea cow ancestors originated in Africa, lived in fresh water
5. New method for creating long-lived stem cells used for bone replacement
6. Mystery to the origin of long-lived, skin-deep immune cells uncovered
7. New model reveals how huddling penguins share heat fairly
8. Spiral Genetics Closes $3 Million in Funding Led by DFJ and Announces Partnership with Omicia
9. Prairie dogs disperse when all close kin have disappeared
10. A closer look at chromosomes
11. Another muscular dystrophy mystery solved; MU scientists inch closer to a therapy for patients
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/23/2014)... in French and German . ... humans and other mammals, the difference between sexes depends on one ... only in males, where the two sexual chromosomes are X and ... ultimately responsible for all the morphological and physiological differences between males ... A very long time ago, the X and Y were identical, ...
(Date:4/23/2014)... Scarborough research shows that male black widow spiders prefer ... rare example of mate preference by male spiders. ... MacLeod and Maydianne Andrade, a professor in UTSC,s Department ... and the wild that males overwhelmingly chose to mate ... widows can tell whether a potential mate is well-fed ...
(Date:4/23/2014)... (4/23/14) -- Researchers have found evidence of an ... that increase aggressive behavior in children, especially in ... all children exposed to prenatal smoking will have ... not," said Brian Boutwell, Assistant Professor at Sam ... senior author on the study. "One possible ...
Breaking Biology News(10 mins):Male or female? 2Male or female? 3Picky male black widow spiders prefer well-fed virgins 2Genetics risk, prenatal smoking may predict behavioral problems 2
... Clonorchis sinensis affects more than 35 million people ... by this parasite causes clonorchiasis. Repeated or chronic infection can ... bile ducts, including the frequently fatal bile duct cancer - ... C. sinensis , published in BioMed Central,s open access journal ...
... researchers found a way of identifying ideal drug combinations ... occurring. The findings, published in Nature Chemical ... development of new drug combinations to combat severe diseases ... stroke and Alzheimer,s are worsened by inflammation, which is ...
... genetically engineered clotting factor that controlled hemophilia in an ... hemophilia and a broad range of other bleeding problems. ... Xa (FXa), a protein active in blood clotting, and ... bleeding in mouse models of hemophilia. "Our designed variant ...
Cached Biology News:Liver parasite lacks key genes for fatty acid synthesis: Genome sequencing of Clonorchis sinensis 2Manchester's 'first step' to perfect drug combinations 2Bioengineered protein shows preliminary promise as new therapy for hemophilia 2
(Date:1/15/2014)... "The interface is the device," Nobel laureate Herbert ... to be found at the junctures where layers ... of nanotechnology, the interfaces between layers of metal ... such high-tech favorites as spintronics, high-temperature superconductors, ferroelectrics ...
(Date:1/15/2014)... 15, 2014 Cynvenio, a cancer diagnostics ... the genomic analysis of tumor cells in the bloodstream, ... web-based cancer decision support application powered by CollabRx, Inc. ... ClearID™ genomic test, Therapy Finder will provide breast cancer ...
(Date:1/15/2014)... More than 5 million Americans are currently ... seniors will die with Alzheimer’s or another dementia, according ... shocked many Americans into looking for ways to improve ... age-related cognitive disorders. Jonathan Weisman, president of Biohack Pure, ...
(Date:1/15/2014)... Freeslate, Inc ., the leading ... Lupin Limited, one of India’s top five pharmaceutical companies, ... System for high throughput solid form screening. ... a wide range of quality, affordable generic and branded ...
Breaking Biology Technology:A deeper look at interfaces 2Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 2Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 3Biohack Pure Offers 5 Tips for Increasing Memory in 2014 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 3
... OMAHA, Neb., April 1, 2011 Transgenomic, ... scientists have completed studies employing the company,s high-sensitivity ... COLD-PCR and BLOCker™-Sequencing.  Results from these studies will ... Research (AACR) meeting in Orlando, Florida, April 2-6, ...
... National Institute of Standards and Technology (NIST) have developed a ... probes used to study nanoscale structures in situ and as ... improve the accuracy of the most precise and delicate nanoscale ... trying to measure the contours of a surface with a ...
... /PRNewswire-Asia-FirstCall/ -- China-Biotics, Inc. (Nasdaq: CHBT ) ... distributor of probiotics products in China, today announced that ... its newly signed U.S. customer. The U.S. ... and formally entered into its agreement with China-Biotics on ...
Cached Biology Technology:Transgenomic, Inc. Presentations to Describe High-Sensitivity Detection of Cancer Biomarkers at the 2011 American Association for Cancer Research Meeting 2Transgenomic, Inc. Presentations to Describe High-Sensitivity Detection of Cancer Biomarkers at the 2011 American Association for Cancer Research Meeting 3Transgenomic, Inc. Presentations to Describe High-Sensitivity Detection of Cancer Biomarkers at the 2011 American Association for Cancer Research Meeting 4Getting the point: Real-time monitoring of atomic-microscope probes adjusts for wear 2China-Biotics Receives First U.S. Sales Order 2China-Biotics Receives First U.S. Sales Order 3
... a software package that provides crystallographers ... custom buffer creation, set-up of experimental ... trials. The software helps crystallographers through ... protein crystallography: Design ...
The PROTEAN II slab gel casting stand is a component of the PROTEAN II XL and xi casting apparatus. It is supplied with gaskets....
Mouse monoclonal [H4B4] to LAMP2 - Lysosome Marker (Phycoerythrin) ( Abpromise for all tested applications). entrezGeneID: 3920 SwissProtID: P13473...
... imaging software for the microscopy market ... cameras, components and peripherals with powerful ... Its intuitive interface simplifies workflow and ... providing powerful features such as image ...
Biology Products: