Navigation Links
Researchers peek at the early evolution of sex chromosomes
Date:8/6/2012

esearch with Ming while she was a doctoral student in his lab. "Usually people will focus on the ancient sex chromosomes because they are the most relevant to us," she said. "So this is the first direct and complete look at a more recently evolved sex chromosome system."

Analyzing the X chromosome is vital to understanding the evolution of sex, said Ming, an affiliate of the Institute for Genomic Biology at Illinois. The new findings in papaya suggest that the human X chromosome, too, has undergone numerous changes since it first distinguished itself from the autosomes, Ming said. Such changes are not detectable because the ancestral autosomes are no longer available for comparison, he said.

Because the papaya sex chromosomes are young and can be compared to closely related autosomes in a sister species, they offer a view of the early events of both X and Y chromosome evolution, Ming said.

Studying papaya sex chromosomes is a complicated task, however. The papaya has male, female and hermaphrodite sexual types, with two kinds of Y chromosomes (the male Y and the slightly modified, hermaphrodite Yh). Papaya plants may produce combinations of male and female (from the XY system) or hermaphrodite and female (from the XYh system) plants.

This complexity causes problems for papaya growers, Ming said. Hermaphrodites are the most productive of the papaya sexual types and yield the best fruit, but the offspring of hermaphrodites are not all hermaphrodites. To aid growers, Ming and his colleagues aim to develop a "true-breeding" hermaphrodite papaya variety that consistently produces hermaphrodite offspring.

When the researchers compared the X chromosome and the hermaphrodite Yh chromosome, they discovered that two major sequence inversions in the sex-determining regions of the Yh had taken place. One of these inversions occurred
'/>"/>

Contact: Diana Yates, Life Sciences Editor
diya@illinois.edu
217-333-5802
University of Illinois at Urbana-Champaign
Source:Eurekalert  

Page: 1 2 3

Related biology technology :

1. SRI International Researchers Developing Bioadhesive Gel to Protect Women from HIV and HSV Infections
2. Researchers create highly conductive and elastic conductors using silver nanowires
3. Researchers create rubber-band electronics
4. Cedars-Sinai researchers, with stem cells and global colleagues, develop Huntingtons research tool
5. Penn researchers study of phase change materials could lead to better computer memory
6. Researchers tune the strain in graphene drumheads to create quantum dots
7. WHEATON® Introduces a New Web Community for Scientists, Researchers, and Biopharmaceutical Packagers
8. Stevenage Bioscience Catalyst to Welcome Cambridge University Researchers
9. Syracuse University researchers use nanotechnology to harness power of fireflies
10. Researchers discover hereditary enzyme deficiency
11. JCVI Researchers, as Part of NIH Human Microbiome Project Consortium, Publish Papers Detailing the Variety and Abundance of Microbes Living on and in the Human Body
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Researchers peek at the early evolution of sex chromosomes
(Date:4/30/2015)...  Asterias Biotherapeutics, Inc. (NYSE MKT: AST), a leading ... today announced that it will release first quarter financial ... the close of the U.S. financial markets. The Company ... May 7, 2015 at 4:30 p.m. Eastern / 1:30 ... developments. For both "listen-only" participants and those ...
(Date:4/30/2015)... (PRWEB) April 30, 2015 Available ... at http://www.lespausa.com , Phytomer’s DOUCEUR INTEMPORELLE ... and reactive skin while battling the weakening threat ... restorative cream is formulated with star ingredient GLYCOSEA, ... biotechnology in a complex of soothing minerals and ...
(Date:4/29/2015)... According to a new market research ... & Non-Portable), Component (Accelerometer, Proximity Probe, & Others), ... Mining, & Others), & Geography - Global Forecast ... reach $1,453.76 Million by 2020, at a CAGR ... and 92 figures spread through 205 pages and ...
(Date:4/29/2015)... April 29, 2015 Cambrex Corporation (NYSE: CBM ... released on Friday, May 1, 2015 before the market opens. ... Company will host a conference call to discuss the financial ... , Friday, May 1, 2015 at 8:30 ... 1-888-468-2440 for U.S.1-719-325-2454 for International  Passcode:  7993632 Dial-in Replay: ...
Breaking Biology Technology:Asterias Biotherapeutics to Report First Quarter Results on May 7, 2015 2Asterias Biotherapeutics to Report First Quarter Results on May 7, 2015 3Phytomer introduces DOUCEUR INTEMPORELLE Restorative Shield Cream 2Phytomer introduces DOUCEUR INTEMPORELLE Restorative Shield Cream 3Vibration Monitoring Equipment (Portable & Non-Portable) Market worth $1,453.76 Million by 2020 - New Report by MarketsandMarkets 2Vibration Monitoring Equipment (Portable & Non-Portable) Market worth $1,453.76 Million by 2020 - New Report by MarketsandMarkets 3Vibration Monitoring Equipment (Portable & Non-Portable) Market worth $1,453.76 Million by 2020 - New Report by MarketsandMarkets 4
... , June 17 /PRNewswire-FirstCall/ - Oncolytics Biotech Inc. (TSX: ... been granted its 35th U.S. Patent, # 7,731,951 entitled "Viruses for ... for treating cell proliferative disorders by administering modified vaccinia virus to ... , , ...
... June 17 ChemoCentryx, Inc., today announced that ... drug candidate CCX354 at the Annual European Congress of ... drug candidate designed to specifically target the CCR1 chemokine ... (RA).  Data demonstrating that CCX354 was safe and well ...
... Researchers at Rensselaer Polytechnic Institute have developed a ... that measure only billionths of a meter thick. ... works on nearly any surface including silicon wafers, ... manufacturing. Sang-Kee Eah, assistant professor in the ...
Cached Biology Technology:Oncolytics Biotech(R) Inc. Announces Issuance of 35th U.S. Patent 2ChemoCentryx Reports Positive Phase I Study Results for CCX354 at the Annual European Congress of Rheumatology (EULAR) 2ChemoCentryx Reports Positive Phase I Study Results for CCX354 at the Annual European Congress of Rheumatology (EULAR) 3ChemoCentryx Reports Positive Phase I Study Results for CCX354 at the Annual European Congress of Rheumatology (EULAR) 4Researchers develop ultra-simple method for creating nanoscale gold coatings 2
(Date:3/31/2015)... March 31, 2015   Guidepoint , a leading ... the Post-Surgical Pain Management TRACKER, part of the ... trends in the medical device and therapeutics markets. The ... including treatment volumes, market share, and adoption rates across ... with joint surgery. The Post-Surgical Pain Management ...
(Date:3/24/2015)... , March 24, 2015   NexID Biometrics ... critical security-authentication needs, today announced the beginning of shipments ... solution. The company, based in ... the three-day Connect:ID Expo, which began here today at ... said version 2.0 of its SDK boosts the accuracy ...
(Date:3/23/2015)... OXFORD, Conn. , Mar. 23, 2015 NXT-ID, Inc. ... authentication company focused on the growing mobile commerce market, announces ... a new advertising campaign on CNBC television starting March 30 ... ads will commence airing in New York ... Executive Officer said: "We are excited about our new ad ...
Breaking Biology News(10 mins):Guidepoint Launches Post-Surgical Pain Management TRACKER 2Guidepoint Launches Post-Surgical Pain Management TRACKER 3NexID Begins Shipments Of Version 2.0 Fake-Finger-Detection Solution 2NXT-ID's Wocket Smart Wallet to Launch New CNBC Regional TV Ad Campaign 2NXT-ID's Wocket Smart Wallet to Launch New CNBC Regional TV Ad Campaign 3
... 24, 2013 For the first time, scientists at ... moderate-severe traumatic brain injury (TBI), atrophy (shrinkage) in the ... increased physical, social and cognitive stimulation. The ... in the chronic stages of traumatic brain injury," was ...
... (Sept. 24, 2013) Retinal (or fundus) photography is ... cameras can cost tens to hundreds of thousands of ... ophthalmic practices and to physicians in third-world countries. In ... Ear researchers describe the relatively simple technique of fundus ...
... researchers have identified and validated two rare gene mutations that ... that strikes after the age of 60. The two mutations ... enzyme involved in processing the amyloid precursor protein which ... the fifth AD gene overall. In their ...
Cached Biology News:Scientists discover environmental enrichment for TBI patients may counter shrinkage in the brain 2Scientists discover environmental enrichment for TBI patients may counter shrinkage in the brain 3Researchers use smart phone photography to diagnose eye disease 2Study confirms that rare mutations increase risk of late-onset Alzheimer's disease 2Study confirms that rare mutations increase risk of late-onset Alzheimer's disease 3
Mouse monoclonal [6G11] to Cytohesin 1 + 2 ( Abpromise for all tested applications)....
HP 1 alpha Immunogen: Synthetic peptide between amino acids 1-100 of the human HP 1 alpha protein. Storage: -20 C, Avoid Freeze/Thaw Cycles...
... KLH-conjugated, synthetic peptide corresponding to ... mouse p19ARF. The epitope ... 62-75. Clone 5-C3-1. Quality ... immunoblot. Stability ...
Request Info...
Biology Products: