Breeding of a new rice variety with early maturity and low amylose content 'Kiraho'
2017
Nakajo, S. | Sasaki, T. | Sugawara, H. | Abe-Kawadai, S. | Kiuchi, Y. | Tamura, K. | Shishido, H. | Takakusagi, M. | Abe, A. | Endo, A. | Kamiyama, Y.
'Kiraho' is a new rice variety with early maturity and low amylose content. It was developed at Iwate Agricultural Research Center in 2011. This variety was selected from the cross between 'Milkey Princess' and 'Iwate61'. 'Kiraho' has been tested as local line number 'Iwate91' since 2008. It was officially registered by Ministry of Agriculture, Forestry and Fisheries of Japan in 2013 (registration no. 24582). Characteristice of 'Kiraho' are as follows: (1)'Kiraho' has low amylose content endosperm. Its amylose content varies between 9 and 12 % under the weather condition in Iwate prefecture. Its variation range is smaller than that of other low amylose content rice in Iwate prefecture. (2)It belongs to the early-maturity group in Iwate, concurrent with 'Iwatekko'. (3)It has high tolerance to sterility caused by low temperatures at booting stage. (4)It has slightly high lodging resistance. (5)It seems to possess one true resistance gene 'Pii' for blast diseases. It has slightly high field resistance to leaf blast and high to panicle blast. Furthermore, it has field resistant gene 'Pb1' which shows highly resistance to panicle blast disease. (6)Its yielding ability is about 9% less than that of 'Iwatekko'.
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