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:2/5/2015)... IRVINE, Calif. , Jan. 27, 2015 ... trusted provider of globally deployed, innovative test ... today announced the delivery of its ... Martin Space Systems Company (LMSSC). GENASYS is ... the demands of mission-critical applications that require ...
(Date:2/5/2015)... , Jan. 30, 2015  It is gratifying ... power and potential for genomic science as a means ... disease prevention and treatment.  I was honored to participate ... government-funded precision medicine program. Since the ... science of genomics—from the first sequenced genome of a ...
(Date:1/22/2015)... 13, 2015 /PRNewswire/ - Today, FindBiometrics, the leading source of biometrics ... its new website design. "When we launched FindBiometrics ... Peter O,Neill , founder and CEO of FindBiometrics. "Now ... involvement from the key players on a very broad scale.  ...
Breaking Biology News(10 mins):Marvin Test Solutions' GENASYS Platform Advances Mission-Critical Aerospace Production Test 2Marvin Test Solutions' GENASYS Platform Advances Mission-Critical Aerospace Production Test 3Marvin Test Solutions' GENASYS Platform Advances Mission-Critical Aerospace Production Test 4J. Craig Venter, Ph.D., Co-Founder and CEO, Human Longevity, Inc. (HLI) Participates in White House Precision Medicine Event 2Identity Industry Leading Publication Debuts New Look As Biometrics Hit Mainstream 2
(Date:2/26/2015)... Feb. 26, 2015 DuPont Executive Vice President ... by key research advancements and product launches across the ... of America Merrill Lynch 2015 Global Agriculture Conference. ... building grain supplies the last two years, long-term demand ... pace of the last decade, when demand for corn ...
(Date:2/26/2015)... BioEnterprise today announced that Northeast ... $2 billion in growth funding during the past 13 ... sources, state – including the Ohio Third Frontier - ... has been raised in the past five years. ... the BioEnterprise Midwest Healthcare Growth Capital  Report.   ...
(Date:2/26/2015)... 2015 According to a new market ... For Transgenic Crops (Corn, Soybean, Cotton and Others), Synthetic ... Share, Growth, Trends and Forecast, 2013 – 2019,”the global ... in 2012 and is expected to reach USD 28,694.1 ... from 2013 to 2019. , Demand for food ...
(Date:2/26/2015)... Feb. 26, 2015  Epic Sciences announced today that ... present at the 35th Annual Cowen and Company Health ... the MIT Room, 3rd Floor. The conference will be ... Mass. Epic is developing diagnostic tests of ... and proteomic changes that occur during the course of ...
Breaking Biology Technology:DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 2DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 3DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 4DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 5More Than $2 Billion Invested in Northeast Ohio Bioscience Start-Up Companies Since 2002 2More Than $2 Billion Invested in Northeast Ohio Bioscience Start-Up Companies Since 2002 3More Than $2 Billion Invested in Northeast Ohio Bioscience Start-Up Companies Since 2002 4Global Agricultural Biotechnology Market is Expected to Reach USD 28,694.1 Million in 2019 : Transparency Market Research 2Global Agricultural Biotechnology Market is Expected to Reach USD 28,694.1 Million in 2019 : Transparency Market Research 3Epic Sciences to Present at 35th Annual Cowen and Company Health Care Conference 2
Cached News: