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 Energy crop production on conservation lands may not boost greenhouse gases
13.03.2017 | Penn State

nachricht How nature creates forest diversity
07.03.2017 | International Institute for Applied Systems Analysis (IIASA)

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: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

When Air is in Short Supply - Shedding light on plant stress reactions when oxygen runs short

23.03.2017 | Life Sciences

Researchers use light to remotely control curvature of plastics

23.03.2017 | Power and Electrical Engineering

Sea ice extent sinks to record lows at both poles

23.03.2017 | Earth Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>