| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
Phytic acid is the storage form of phosphorus (P) in seeds and exists as phytate, typically representing 70 to 90% of the total P of seeds. In this study, to overcome various problems related to phytate, a low phytate (LP) soybean line was developed from crossing a mutant treated with a mutagenic line and varieties cultivated in Western Japan. From the results of a field experiment, several LP lines with yields equivalent to Western Japan-encouraged cultivars were selected. In addition, LP lines with high P usage efficiency and high productivity under low P conditions were also selected.
From the results of a hen-feeding experiment, chicken feces excreted from hens fed concentrated feed of LP soybean contained high levels of available phosphorus. Productivity of Italian ryegrass grown on LP feces was higher than that of HP feces. These results suggest that LP soybean lines are useful for saving P resources.
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