Ecological and genetic characteristics of sulfonylurea-resistant Monochoria vagina us, a paddy weed
| Project/Area Number |
15580015
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Crop science/Weed science
|
|---|
| Research Institution | Kyoto University (2005)
Kyoto Prefectural University (2003-2004) |
|---|
Principal Investigator |
TOMINAGA Tohru Kyoto University, Graduate School of Agriculture, Professor, 農学研究科, 教授 (10135551)
|
|---|
| Project Period (FY) |
2003 – 2005
|
| Project Status |
Completed (Fiscal Year 2005)
|
| Budget Amount *help |
¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2005: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2004: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2003: ¥2,400,000 (Direct Cost: ¥2,400,000)
|
|---|
| Keywords | Monochoria vaginalis / sulfonylurea herbicide / herbicide resistant biotype / paddy weed / weed control / reproduction / fitness / genetic variation / 閉鎖花 / アセト乳酸合成酵素 / スルフォニルウレア系除草剤 / 抵抗性個体の起源 / 除草剤抵抗性 / 出現状況 / 乾物生産量 / 発芽特性 |
|---|
| Research Abstract |
Sulfonylurea (SU) herbicide is the most important herbicide used in paddy fields in Japan because of its broad spectrum of weed control activity and relatively low usage rates. A total of 12 SU-resistant biotypes of paddy weeds has been reported in Japan. Among them, Monochoria vaginalis is one of the most harmful paddy weeds. It is important to clarify the ecological fitness of SU-resistant biotypes of the weed, and the origin and spread of SU-resistant gene(s) for their control. The biomass and seed production of SU-resistant biotypes of M.vaginalis were compared with those of susceptible ones and clarified genetic variation of SU-resistant biotypes in Japan.
To evaluate the resistance to bensulfuron-methyl, imazosulfuron and pyrazosulfuron-ethyl, elongation of new roots of nine populations under each herbicide treatment was measured. Zennoji, Kamitsuneyoshi, Maizuru, Kasai-B and Ushiku biotypes elongated new roots under the treatments, but Seika, Kameoka, Kamiseya and Kasai-A biotype
… More
s did not. The former five biotypes were SU-resistant and the latter four biotypes were SU-susceptible.
Each seven plant of SU-susceptible and resistant biotypes was grown individually in a 1/10,000 a wagner pot. They were harvested in September, dried and weighed. Number of seeds per plant was counted. No differences were found in dry matter production and number of seeds produced per plant between SU-susceptible and resistant biotypes. Ecological fitness of SU-resistant biotypes seems not to be different from that of SU-susceptible biotypes.
The genetic diversity within a population and relationship among populations were analyzed by RAPD(random amplified polymorphic DNA). There was no genetic variation among 20 individuals within each SU-resistant population of Zennoji, Kamitsuneyoshi, Maizuru, Kasai-B or Fukushima. In UPGMA tree based on simple matching coefficient, the SU-resistant populations were grouped into different clades. These results strongly suggest that SU-resistant biotypes originated independently. Less
|
Report
(4 results)
Research Products
(22 results)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Book] 雑草生態学2006
Author(s)
根本正之
Total Pages
174
Publisher
朝倉書店
Description
「研究成果報告書概要(和文)」より
Related Report
-
[Book] Weed Ecology2006
Author(s)
Nemoto Masayuki
Total Pages
174
Publisher
Asakura
Description
「研究成果報告書概要(欧文)」より
Related Report
-
-
-
[Book] 新編農学大事典2004
Author(s)
山崎耕宇
Total Pages
1786
Publisher
養賢堂
Description
「研究成果報告書概要(和文)」より
Related Report
-
-
[Book] 新編 農学大事典2004
Author(s)
山崎耕宇, 久保祐雄, 西尾敏彦, 石原邦 監修
Total Pages
1786
Publisher
養賢堂
Related Report
