"Iwaidawara" is a new rice cultivar suitable for rice feed grain bred at the NARO Tohoku Agricultural Research Center in 2013. "Iwaidawara" was selected from the progenies of a cross between the "Ouu-shi395" rice line and the "Ouu-shi394" large grain rice line, both of which show early maturity and high yield. "Iwaidawara" is classified as an early heading and middle maturity group in the middle of the Tohoku region. It is of medium length and has a thick culm, a long panicle, and a small number of panicles per area, and it belongs to the super-heavy panicle type of rice. Its resistance to leaf blast and panicle blast remain unknown, but it is believed to have the true resistance genes to blast, Pib and Pik. Its cold tolerance at the booting stage is weak. This brown rice can be easily discriminated from brown rice for food due to its larger grain size and appearance of worse quality. At the NARO Tohoku Agricultural Research Center, the rough brown rice yield of "Iwaidawara" is 85.5 kg/a, which is almost the same as that of the high yield cultivar "Fukuhibiki" and 13% higher than that of the leading cultivar "Akitakomachi." At the Daitou area of Iwate Prefecture, the rough brown rice yield of "Iwaidawara" is 68.8 kg/a, which is 13% higher than that of "Fukuhibiki.", The new "Iwaidawara" rice cultivar is expected to spread in the middle and southern parts of the Tohoku region.
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東北中南部の飼料用米生産に適した水稲品種「いわいだわら」の育成
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