HOME >> BIOLOGY >> NEWS
Mexican farmers effectively cultivate phenotypic diversity in maize

Erosion of genetic diversity of crop plants has for several decades been making it necessary to develop initiatives for protecting these plant resources. One strategy is in-situ conservation of crop plants. The model currently advanced involves maintaining the varieties to be conserved isolated in reserves, protected from entry of other varieties from elsewhere and cultivated according to ancestral farming practices. Researchers from the IRD and the CIMMYT of Mexico (1) used work previously conducted in Mexico on maize varieties, or landraces, to devise a different, dynamic, model judged more compatible with agricultural development and closer to the real conditions in which these plants diversified under the constant action of farmers (2). Insofar as local landraces are still grown as crops on sufficiently large areas of land, the introduction of others from outside, favouring a certain rate of gene flow, would in fact be a source of diversity rather than a factor of genetic erosion.

Mexico, the cradle of maize cultivation, is where this member of the Graminae family, a descendent of a local wild grass, teosinte, was domesticated and phenotypically diversified by human action, at least 6 000 years B.P. An in-situ conservation programme jointly run by CIMMYT, INIFAP (Mexican National Institute of Research in Forestry and Agriculture and Livestock Breeding) and the IRD, conducted in the central valleys of Oaxaca, enabled the research team to characterize the genetic structure of the different populations of local maize landraces and measured the impact of farming practices on this diversity. They focused on two types of diversity: phenotypic (concerning the morphological characters of the plants) and the genetic diversity (observed using genetic markers).

Study of the populations of maize landraces cultivated in six villages of this central region of Mexico has revealed that the morphological and agronomic characters in the field, such as ear size, kern
'"/>

Contact: Bndicte Robert
presse@paris.ird.fr
33-1-48-03-75-19
Institut de Recherche Pour le Dveloppement
29-Apr-2004


Page: 1 2 3

Related biology news :

1. Dont drink the water: Texas A&M researcher conducting study of polluted Mexican lake
2. Lower insulin sensitivity found In Mexican-Americans, regardless of behavioral and metabolic factors
3. Researchers project future shrinking biodiversity of Mexican species
4. Mexican reserves fail to protect monarch butterflies
5. Power plants, other industry could offer contracts to farmers in helping reduce carbon emissions
6. Want a side of algae with that? Hawaiian farmers sell seaweed by the seashore
7. Few Filipino farmers know of the benefits of golden rice
8. Worm farmers wriggle into US market
9. Dairy farmers protect groundwater, save money
10. Agricultural science helping farmers reduce greenhouse gas
11. IFDC innovative technology increases farmers agricultural productivity, maintains resource base

Post Your Comments:
(Date:5/8/2015)... SAN JOSE, Calif. , May 8, 2015 ... human interface solutions, today announced that members of the executive ... J.P. Morgan 43rd Annual Technology, Media and Telecom Conference ... Westin Waterfront Hotel in Boston, MA ... Date: May 27, 2015 Time: 2:45pm ET Location: The New ...
(Date:5/6/2015)... May 6, 2015 LifeBEAM, a developer of ... producer, announced today that they will expand their partnership ... first bio-sensing cycling helmet and the first joint project ... new colors in order to give cyclists more style ... addition, LifeBEAM and Lazer announced their plan to release ...
(Date:4/27/2015)... more than four decades, AUVSI,s Unmanned Systems ... event for the unmanned land, sea, and air industries. ... local, national, or trade news organization interested in gathering ... applications of unmanned technologies. The conference will explore the ... and how it will soon impact the lives of ...
Breaking Biology News(10 mins):Synaptics to Present at Upcoming Investor Conferences 2LifeBEAM and Lazer Announce Expanded Partnership in Bio-Sensing Sports Gear 2LifeBEAM and Lazer Announce Expanded Partnership in Bio-Sensing Sports Gear 3UNMANNED SYSTEMS 2015: Largest International Conference and Trade Show for the Drone and Unmanned Technology Industry 2UNMANNED SYSTEMS 2015: Largest International Conference and Trade Show for the Drone and Unmanned Technology Industry 3UNMANNED SYSTEMS 2015: Largest International Conference and Trade Show for the Drone and Unmanned Technology Industry 4UNMANNED SYSTEMS 2015: Largest International Conference and Trade Show for the Drone and Unmanned Technology Industry 5
(Date:5/21/2015)... 2015 Patent Offering, The patent’s technology ... or therapeutic imaging within a body lumen (open space). ... having a low cost, single-use disposable illumination and camera ... October 18, 2013 and the patent approval was received ... physician to customize the lighting and magnification of the ...
(Date:5/21/2015)... Ontario (PRWEB) May 21, 2015 ... into an exclusive North American distribution agreement with ... testing system. , With more than 160 years ... products and services for laboratory and production facilities, ... operational excellence and differentiated services to enable science. ...
(Date:5/20/2015)... --Research and Markets ( http://www.researchandmarkets.com/research/qfxkcq/global_cell ) has ... Market Outlook 2020 " report to their offering. ... regenerative medicine is expected to have huge marketing potential. ... in the growth of deregulated organs. Several therapeutic molecules ... to form new tissue or sometimes organ transplant is ...
(Date:5/20/2015)... NEW YORK , May 20, 2015 /PRNewswire-USNewswire/ ... announced a leadership gift of $100 million from ... help create a new laboratory building that will ... campus extension. The Marie-Josée and Henry R. Kravis ... over the FDR Drive, spanning approximately three city ...
Breaking Biology Technology:IpAuctions™ Presents The Worlds Smallest Disposable Illuminated Endoscope For Auction 2IpAuctions™ Presents The Worlds Smallest Disposable Illuminated Endoscope For Auction 3Veolia’s TECTA™ B16 Instrument for E. Coli Detection is Offered Exclusively Through VWR 2Global Cell Therapy Market Outlook 2015-2020 - 262 Cell Therapies & 13 Marketed Cell Therapies 2Global Cell Therapy Market Outlook 2015-2020 - 262 Cell Therapies & 13 Marketed Cell Therapies 3The Marie-Josee and Henry R. Kravis Foundation Provides Landmark Gift of $100 Million to The Rockefeller University 2The Marie-Josee and Henry R. Kravis Foundation Provides Landmark Gift of $100 Million to The Rockefeller University 3The Marie-Josee and Henry R. Kravis Foundation Provides Landmark Gift of $100 Million to The Rockefeller University 4
Cached News: