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:
*Name:
*Comment:
*Email:


(Date:2/3/2016)... 2016 Vigilant Solutions announces today that the ... Missouri solved two recent hit-and-run cases ... from Vigilant Solutions. Brian Wenberg explains, ... victim was walking out of a convenience store and witnessed an elderly male ... vehicle, striking his vehicle and leaving the scene.  In ...
(Date:2/2/2016)... NEW YORK , Feb. 2, 2016 Technology ... service presents an analysis of the digital and computed ... Malaysia , and Indonesia ... current trends and market size, as well as regional ... by country and discusses market penetration and market attractiveness, ...
(Date:2/1/2016)... Fla. , Feb. 1, 2016  Wocket® smart wallet ( www.wocketwallet.com ... and television personality, Joey Fatone . Las Vegas ... greet fans. --> Las Vegas , where ... --> The new video ad was filmed at the Consumer ... appeared at the Wocket booth to meet and greet fans. ...
Breaking Biology News(10 mins):
(Date:2/10/2016)... ... February 10, 2016 , ... ... Society of Pharmaceutical Engineering (ISPE) Rocky Mountain Chapter 21st Annual Vendor Exhibition on ... fill more than 100 tables for its annual event, which will run from ...
(Date:2/10/2016)... (PRWEB) , ... February 10, 2016 , ... ... expansion to their comprehensive training and support program, Sonalink™ remote monitoring. The inaugural ... procedures performed on Friday, February 5th, connecting Dr. Samuel Peretsman to a HIFU ...
(Date:2/10/2016)... ... February 10, 2016 , ... Curoverse announced today ... Azure, Arvados provides capabilities for managing and processing genomic and health data at ... major institutions collecting and analyzing genomic data,” said Adam Berrey chief executive officer ...
(Date:2/10/2016)... , ... February 10, 2016 , ... Cenna Bioscience Inc., ... the treatment of Alzheimer’s disease, announced today it has been selected to present at ... the Breakers in Palm Beach, Florida. The purpose of the Forum is to ...
Breaking Biology Technology:
Cached News: