Breeding of a low amylose rice cultivar "Soft 158"
1995
Uehara, Y. (Hokuriku National Agricultural Experiment Station, Joetsu, Niigata (Japan)) | Kobayashi, A. | Koga, Y. | Fukui, K. | Shimizu, H. | Ohta, H. | Miura, K. | Horiuchi, H. | Okuno, K. | Fujita, Y.
Soft 158 is a late-maturing and low amylose rice cultivar newly developed at the Hokuriku National Agricultural Experiment Station in 1995. Soft 158 was selected from the progeny of the cross made in 1986 between Hokuriku 127 and Kenkei 2078 (a low amylose content mutant line derived from Sasanishiki), aiming at a new cultivar with low amylose content and new grain characters. A promising line was named Hokuriku 158 in the F6 generation to be submitted to local adaptability trials at various locations. Hokuriku 158 was registered as Paddy Rice Norin 337 by the Ministry of Agriculture, Forestry and Fisheries and named "Soft 158" in 1995. Soft 158 is characterized by low amylose content (50-60% of Akinishiki) and suit raw materials for rice cracker, for Onigiri (rice ball) and for blend rice with superior eating quality. This cultivar has tolerance to lodging due to short culm, true resistance gene to rice blast, Pi-a and moderate field resistance to blast. Judging from its maturity, Soft 158 can be grown in plains in southern-Tohoku, Hokuriku, Kanto, Tokai, Kinki, chugoku, Shikoku and Kyushu regions of Japan
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