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:1/8/2019)... ... January 07, 2019 , ... Sonion ... for hearing instruments and specialty earphones, and Valencell , the leading innovator ... receiver in canal with an embedded biometric sensor. The BiometRIC measures key vital ...
(Date:1/4/2019)... ... January 03, 2019 , ... Over the last few ... drug discovery research workflows with biology ranging from single cell-type spheroids to highly ... vitro studies, they create several challenges that need to be overcome in order ...
(Date:12/22/2018)... ... December 21, 2018 , ... On Wednesday, Dec. ... Healthcare Drinks event featuring Helen Chen, Greater China Managing Partner of L.E.K. Chen ... was moderated by patent attorney David J. Dykeman , co-chair of Greenberg ...
Breaking Biology News(10 mins):
(Date:12/18/2018)... ... December 18, 2018 , ... USDM Life Sciences, the leading ... industry, unveiled a completely redesigned website at http://www.usdm.com . The site offers ... their valued clients and business partners. , The website has a revamped ...
(Date:12/13/2018)... ... December 12, 2018 , ... Helping conclude Healthy Aging Month this ... slim hearing aid within its Vision and Hearing campaign that sets out to shed ... show that despite continued efforts to destigmatize hearing aids over the years, 9 out ...
(Date:12/5/2018)... ... December 05, 2018 , ... STRmix™ – sophisticated forensic ... interpret – has been used to convict a Wyoming man of third-degree sexual assault, ... Laboratory used STRmix™ to test for DNA on the couch cushions on which the ...
(Date:11/26/2018)... ... 26, 2018 , ... USARAD Holdings Inc., the leading US ... (Virtual Radiologic founders) among other healthcare investors exhibits at the Radiological Society of ... Chicago. The company is proud to announce a 10 year anniversary since its ...
Breaking Biology Technology:
Cached News: