【JIRCAS Mail Magazine, Sep】 Innovative Approaches in Reducing Nitrogen Fertilizer Application

JIRCAS Mail Magazine (English)

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【JIRCAS Mail Magazine No.23 (Sep. 2021)】
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JIRCAS has succeeded in developing wheat that shows high productivity
even with less nitrogen fertilizer.
Our research has shown that productivity can be maintained even with 60%
less nitrogen fertilizer.
In the future, we aim to spread the technology to wheat fields, which
occupy about 225 million hectares worldwide, and contribute to reduce
GHG emissions and water pollution.

■ Latest Topics
● JIRCAS International Symposium 2021 (Wednesday, November 17, 2009)
The theme of this year's international symposium is "The Role of
Science, Technology and Innovation in Achieving Sustainable Food Systems
in the Asia Monsoon Region: A Platform for International Collaboration”.
The program and registration will be announced in the next newsletter.

● Dr. FUKUDA Yoshimichi receives the Japanese Society of Breeding Award
Dr. Fukuda, who has been promoting an international research network for
the development of rice blast control technology, received the 2020
Japanese Society of Breeding Award.
An overview of  results of Dr. Fukuda's research achievements is
introduced in the "New Technology and Research Results" section.

● JIRCAS co-organized the International Workshop of Southeast Asia
Research-based Network on Climate Change Adaptation Science with GLEC,
Ibaraki University
The workshop was held online on September 16-17, 2021. In addition to
presentations from researchers who are involved in climate change, young
researchers from overseas and students from Ibaraki University Junior
High School also presented posters and discussed their research results
in English.

■ New Technology and Research Results from JIRCAS
The following are three research results from JIRCAS that will lead to
the development of improved rice varieties.

● International differential system to protect against rice blast disease
Rice blast is an important transboundary disease that occurs in all
regions where rice is grown, and the use of resistant varieties is an
effective control technology.
The international differential system developed based on the information
on the pathogenicity of rice blast fungus strains and genetic variation
of rice genetic resources for resistance obtained in Asia and Africa can
be used for the development of resistant varieties and control of blast

● Improve rice panicle numbers in nutrient-poor soils
In the nutrient deficient soils found in sub-Saharan Africa, one of the
yield limiting factors is the reduced number of panicles due to the
suppression of tillering.
The quantitative locus MP3, introduced from the Japanese cultivar
Koshihikari to the Indian high-yielding cultivar, was able to promote
tillering and increase in panicle number in nutrient-poor paddy fields
in Madagascar.

● Key metabolites for estimating phosphorus use efficiency in rice
Phosphorus, one of the three major plant nutrients, is closely related
to crop yields, but there are concerns that its resources will be
depleted in the future.
In order to develop crops with high phosphorus utilization efficiency,
we conducted a comprehensive analysis of metabolites, and found that
metabolites related to the removal of reactive oxygen species and amino
acids are closely related to phosphorus utilization efficiency in rice.
These metabolites can be used as markers for estimating rice plants with
high phosphorus utilization efficiency.

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【Edited and published by】
Information and Public Relations Office
Japan International Research Center for Agricultural Sciences (JIRCAS)
1-1 Ohwashi, Tsukuba, Ibaraki, Japan

作成者 Japan International Research Center for Agricultural Sciences
国立情報学研究所メタデータ主題語彙集(資源タイプ) Article
言語 eng