A new rice cultivar ""Yawarakomachi""
2001
Okamoto, M. (National Agricultural Research Center for Kyushu Okinawa Region, Nishigoshi, Kumamoto (Japan)) | Hirabayashi, H. | Kaji, R. | Fukuoka, R. | Yagi, T. | Nishiyama, H. | Nishimura, M. | Fukaura, S. | Yamashita, H. | Takita, T. | Saito, K.
A new paddy rice cultivar, ""Yawarakomachi"", developed at the Kyushu National Agricultural Experiment Station, was registered as Norin 364 by the Ministry of Agriculture, Forestry and Fisheries (MAFF) in 2000. Yawarakomachi is the first low-amylose content cultivar adaptable to the normal season culture of southwestern Japan. This cultivar was selected from the progenies of the combination Nishihomare/Tankei 2021. One of the parents, Tankei 2021, developed at the National Institute of Agrobiological Resources, is a strain with low amylose content derived from a mutant of Kinmaze. The characteristics of Yawarakomachi are as follows. The maturity is almost the same as that of Nishihomare and is classified as moderate in the Kyushu region. Compared to Nishihomare, the culm is shorter, the number of panicles is slightly greater and lodging resistance is lower. It has a true resistant gene to the blast, Pia and the field resistance is slightly weak before heading and becomes moderate after heading. It belongs to the group of Kinmaze to bacterial leaf blight and its resistance is somewhat weak. The grain yield is moderate and the 1000 grain weight is 21 to 22g. Although the average amylose content amounts to 12%, the grains occasionally look white, like those of glutinous cultivars. The appearance of the grains tends to vary with the temperature for 30 days after heading. Yawarakomachi tastes as good as Hinohikari, which has the best eating quality, like Koshihikari. The eating quality could be made superior by blending Yawarakomachi with some other cultivars.
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