Breeding of 'Yukigasumi', a high-yielding rice cultivar with low amylose content and superior eating quality
2015
Kuroki, M. (NARO Hokkaido Agricultural Research Center (Japan). Crop Breeding Research Division) | Shimizu, H. | Ando, I. | Yokogami, N. | Matsuba, S. | Miura, K. | Konno, K. | Araki, H.
'Yukigasumi', a new rice cultivar with low amylose content in the endosperm, was bred from a cross between the breeding lines 'Satsukei96118' with low-amylose content in the endosperm and 'Kuiku160' with high cold tolerance and good eating quality at the NARO Hokkaido Agricultural Research Center (formerly the National Agricultural Research Center for Hokkaido Region). 1. 'Yukigasumi' is a moderate maturing cultivar, and its heading and maturing dates are slightly later than those of 'Oborozuki', a cultivar of Hokkaido with low amylose content in the endosperm. 2. Yielding ability of 'Yukigasumi' is more than 10 % greater than that of 'Oborozuki' and 5 % greater than that of 'Yumepirika', a leading cultivar of Hokkaido with low amylose content in the endosperm. 3. 'Yukigasumi' has high tolerance to low temperatures at the booting stage. 4. 'Yukinomegumi' seems to possess the true resistance genes Pia, Pii, and Pik for blast disease. Its field resistance to leaf and panicle blast is almost the same as that of 'Oborozuki'. 5. The amylose content in the endosperm of 'Yukigasumi' is slightly higher than that of 'Oborozuki', but slightly lower than that of 'Yumepirika'. 6. The protein content in the endosperm is lower than those of 'Oborozuki' and 'Yumepirika'. 7. The eating quality of cooked 'Yukigasumi' rice is almost the same as that of 'Oborozuki' and that of 'Yumepirika'. 'Yukigasumi' is considered to be adaptable to major rice cultivating areas of Hokkaido.
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