Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Salt - tolerant rice requires careful selection

14.04.2004


Research in the Netherlands has revealed that under sub-otpimal conditions, the best way for rice breeders to improve the rice harvest is to produce varieties whose performance is not fertiliser dependent. However, specifically modified varieties need to be developed for rice growing under saline conditions.

Gambian researcher Baboucarr Manneh investigated variations in the rice yield and the possibilities for increasing this under a variety of environmental circumstances by means of plant breeding. For example, he discovered that in general breeding is best directed towards varieties that are adapted to a wide range of conditions and whose performance is not fertiliser dependent. However for cultivation on silt soils, only varieties with a genetic predisposition for these specific conditions should be used.

Manneh carried out field experiments with rice in salt water and in fresh water in The Gambia in West Africa. He also studied the effect of nitrogen fertilisation on the rice yield.



The researcher could accurately predict the rice yield with the help of DNA markers. This opens up the way for breeders to use DNA fingerprints as a selection criterion. Manneh also found that the crop growth model ORYZA1 accurately predicted the biomass and grain yield of the rice. Using this model he could also assess the possibilities for increasing the yield by manipulating the physiological characteristics of the rice plant.

A high biomass production is necessary for the potential grain yield of a rice plant. However, for the actual grain yield the distribution of the total dry matter over the root, shoot, stem and leaf, as well as the cultivation period are important. The relative importance of these factors seems to change with the environmental circumstances investigated.

Rice cultivation in many former mangrove forests in West Africa, is difficult due to the salinity of the water there. In Asia, where most of the world’s rice is produced, most of the land is covered with silt water. The growers in these countries often have to cope with a shortage of fertiliser as well. The rice yield under these sub-optimal conditions can be increased by selecting the appropriate varieties.

The research was funded by the Netherlands Organisation for Scientific Research.

Sonja Jacobs | alfa
Further information:
http://www.nwo.nl/nwohome.nsf/pages/nwop_5x5bvh_eng

More articles from Agricultural and Forestry Science:

nachricht Fighting a destructive crop disease with mathematics
21.06.2017 | University of Cambridge

nachricht Unusual soybean coloration sheds a light on gene silencing
20.06.2017 | University of Illinois College of Agricultural, Consumer and Environmental Sciences

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Quantum thermometer or optical refrigerator?

23.06.2017 | Physics and Astronomy

A 100-year-old physics problem has been solved at EPFL

23.06.2017 | Physics and Astronomy

Equipping form with function

23.06.2017 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>