New maize map to aid plant breeding efforts
In a massive survey of genetic diversity in maize, also known as corn, researchers across the United States, have developed a gene map that should pave the way to significant improvements in a plant that is a major source of food, fuel, animal feed and fiber around the world. The new map, a special type of gene map known as a haplotype map, charts genetic diversity and recombination across the genome of 27 inbred lines of maize. The research team, led by U.S. Department of Agriculture scientists at Cornell University and Cold Spring Harbor Laboratory in New York and including plant scientist Jeffrey Ross-Ibarra of the University of California, Davis, will report its findings in the Nov. 20 issue of the journal Science.
"We are hopeful that the information that this haplotype map reveals about the genetic diversity of maize will provide a foundation for efforts to understand maize evolution and the genetic basis of complex traits that may prove key to maize improvement," Ross-Ibarra said.
Maize (Zea mays L.), with its genome of an estimated 30,000 genes distributed along 10 chromosomes, is about 70 percent the size of the human genome. In constructing the haplotype map, the researchers identified several million genetic variations — or polymorphisms — in the DNA sequence among the 27 maize inbred lines, as well as 10-fold to 30-fold variation in the rates at which genes recombine.
"This approach yielded evidence that points to hundreds of regions in the genome that were probably involved in the domestication of maize and-or geographic differentiation among various lines of maize," Ross-Ibarra said."
Source: University of California - Davis
Articles on the same topic
- ISU's Plant Sciences Institute researchers provide understanding to maize genome sequenceThu, 19 Nov 2009, 14:41:12 EST
- PLoS Genetics 2009 maize genome collectionThu, 19 Nov 2009, 14:40:59 EST
- Scientists at UA, collaborating institutions decode maize genomeThu, 19 Nov 2009, 14:40:56 EST
- Reference genome of maize, most important US crop, is published by team co-led by CSHL scientistsThu, 19 Nov 2009, 14:40:41 EST
- New maize map to aid plant breeding effortsfrom Science BlogThu, 19 Nov 2009, 22:14:29 EST
- Reference genome of maize, most important US crop, is published by team co-led by CSHL scientistsfrom Science BlogThu, 19 Nov 2009, 16:35:25 EST
- Scientists crack corn code: Reference genome of maize, most important US cropfrom Science DailyThu, 19 Nov 2009, 16:28:11 EST
- PLoS Genetics 2009 maize genome collectionfrom PhysorgThu, 19 Nov 2009, 14:42:33 EST
- Reference genome of maize publishedfrom PhysorgThu, 19 Nov 2009, 14:21:22 EST
Latest Science NewsletterGet the latest and most popular science news articles of the week in your Inbox! It's free!
Learn more about
Check out our next project, Biology.Net
From other science news sites
Popular science news articles
- Did genetic links to modern maladies provide ancient benefits?
- Anthropology: Ancient skull from Galilee cave offers clues to the first modern Europeans
- The 2 faces of Mars
- Missing link in metal physics explains Earth's magnetic field
- Some potentially habitable planets began as gaseous, Neptune-like worlds