Navigation Links
Plants cloned as seeds
Date:2/17/2011

Plants have for the first time been cloned as seeds. The research by aUC Davis plant scientists and their international collaborators, published Feb. 18 in the journal Science, is a major step towards making hybrid crop plants that can retain favorable traits from generation to generation.

Most successful crop varieties are hybrids, said Simon Chan, assistant professor of plant biology at UC Davis and an author of the paper. But when hybrids go through sexual reproduction, their traits, such as fruit size or frost resistance, get scrambled and may be lost.

"We're trying to make a hybrid that breeds true," Chan said, so that plants grown from the seed would be genetically identical to one parent.

Some plants, especially fruit trees, can be cloned from cuttings, but this approach is impractical for most crops. Other plants, especially weeds such as hawkweed and dandelions, can produce true seeds that are clones of themselves without sexual reproduction -- a still poorly understood process called apomixis.

The new discovery gets to the same result as apomixis, although by a different route, Chan said.

Normally, eggs and sperm are haploid -- they have half the number of chromosomes of the parent. The fertilized egg and the adult plant it grows into are diploid -- containing a full complement of chromosomes, half contributed by each parent.

Chan and his colleagues focused their work on the laboratory plant Arabidopsis, which has certain genetic mutations that allow it to produce diploid eggs without sexual recombination. These eggs have the same genes and number of chromosomes as their parents. But those eggs cannot be grown into adult plants without fertilization by sperm, which adds another parent's set of chromosomes.

Last year, Chan and UC Davis postdoctoral researcher Maruthachalam Ravi showed that they could breed haploid Arabidopsis plants that carried chromosomes from only one parent. They introduced a genetic change so that after the eggs were fertilized, the chromosomes from one of the parents were eliminated. Such haploid plants would reduce the time needed to breed new varieties.

In the new study, Chan's lab, with colleagues from India and France, crossed these Arabidopsis plants programmed to eliminate a parent's genes with either of two mutants that can produce diploid eggs.

The result? In about one-third of the seeds produced, the diploid eggs were successfully fertilized, then the chromosomes from one parent were eliminated, leaving a diploid seed that was a clone of one of its parents.

Ravi described the result as a step on the way towards artificial apomixis. The team hopes to produce crop plants, such as lettuce and tomato, that can fertilize themselves and produce clonal seeds. Applications for provisional patents on the work have been filed.


'/>"/>

Contact: Andy Fell
ahfell@ucdavis.edu
530-752-4533
University of California - Davis
Source:Eurekalert

Related biology news :

1. 2 new plants discovered in Spain
2. Stem cell transplants help kidney damage
3. Invasive plants can create positive ecological change
4. Different evolutionary paths lead plants and animals to the same crossroads
5. Plants can adapt genetically to survive harsh environments
6. Free radicals in cornea may contribute to Fuchs dystrophy, most common cause of corneal transplants
7. Fast growth, low defense -- plants facing a dilemma
8. Forest Service offers free guide to managing invasive plants
9. UC Davis study shows plants moved downhill, not up, in warming world
10. Gene helps plants use less water without biomass loss
11. Filtering kitchen wastewater for plants
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/30/2017)... -- On April 6-7, 2017, Sequencing.com will host the world,s ... at Microsoft,s headquarters in Redmond, Washington ... health and wellness apps that provide a unique, personalized ... is the first hackathon for personal genomics and the ... the genomics, tech and health industries are sending teams ...
(Date:3/29/2017)... 2017  higi, the health IT company that operates ... America , today announced a Series B investment ... EveryMove. The new investment and acquisition accelerates higi,s strategy ... transform population health activities through the collection and workflow ... higi collects and secures data today on behalf of ...
(Date:3/24/2017)... MILAN , March 24, 2017 The Controller ... Deputy Controller Mr. Abdulla Algeen have received the prestigious international ... Continue Reading ... ... small picture) and Deputy Controller Abdulla Algeen (small picture on the right) ...
Breaking Biology News(10 mins):
(Date:5/19/2017)... ... 19, 2017 , ... The University City Science Center is ... for commercialization, and who are affiliated with the 21 partner academic and research ... now in its tenth round, is the first multi-institutional proof-of-concept program for the ...
(Date:5/18/2017)... ... 16, 2017 , ... Clinical Supplies Management (“CSM”), a Great Point Partners II ... grow. CSM has doubled in size over the past six months with the ... , Roger Gasper joins CSM as Chief Financial Officer. Roger has over 25 ...
(Date:5/18/2017)... ... May 17, 2017 , ... Cognition Corporation ... commercialization, has just released version 9.0 of the Cognition Cockpit platform. , “Our ... Cockpit,” says David Cronin, CEO of Cognition. “We’re thrilled to finally be able ...
(Date:5/18/2017)... ... 17, 2017 , ... G-CON Manufacturing, Inc., the leader in ... Jornitz, was recognized as a Top 10 Industry Influencer on The Medicine Maker’s ... bettering the pharma industry and bringing life-changing medicines to market” across four categories. ...
Breaking Biology Technology: