@article{oai:repository.naro.go.jp:00001354,
 author = {濃沼, 圭一 and KOINUMA, Keiichi and 三浦, 康男 and MIURA, Yasuo and 佐藤, 尚 and SATO, Hisashi and 榎, 宏征 and ENOKI, Hiroyuki and 高宮, 泰宏 and TAKAMIYA, Yasuhiro and 三木, 一嘉 and MIKI, Kazuyoshi},
 journal = {北海道農業研究センター研究報告, Research BUlletin of the NARO Hokkaido Agricultural Research Center},
 month = {Mar},
 note = {A new silage maize cultivar, "Ohzora", was developed and registered as "Maize Norin Kou 56" by the Japanese Ministry of Agriculture, Forestry and Fisheries in 2002. Ohzora is a single cross hybrid between a dent inbred line, Ho57, as seed parent and a flint inbred line, Ho47, as pollen parent. Ohzora is classified into the medium maturity group and adaptable to central and southern area of Hokkaido. The silking date is a day later than Pioneer 3790 and the same as that of Pioneer 3845. Whole-lant dry matter con-tent of Ohzora is almost the same as that of Pioneer 3790. The average yield of Ohzora is 6% higher than that of Pioneer 3790 and 3% higher than that of Pioneer 3845 for whole-plant dry matter and 4% higher than that of Pioneer 3790 and 3% higher than that of Pioneer 3845 for estimated total digestible nutrients (TDN). The average dry matter ear content of Ohzora is 51%, 2.0 - 2.5% lower than those of Pioneer 3790 and Pioneer 3845. The whole-plant digestibility is almost the same as that of Pioneer 3790. Ohzora has a high level of lodging resistance, with lower percentage of lodged plants than those of Pioneer 3790 and Pioneer 3845. Ohzora shows a moderate level of resistance to northern corn leaf blight (Setosphaeria turcica) and southern corn leaf blight (Cochliobolus heterostrophus). Its level of resistance to northern corn leaf blight is lower than those of Pioneer 3790 and Pioneer 3845 and higher than that of Kitayutaka. Its resistance to southern corn leaf blight is as high as that of Pioneer 3845 and lower than that of Pioneer 3790. Ohzora shows resistance to common smut (Ustilago maydis) and streaked dwarf (RBsDV). Although the lower leaf death rate of Ohzora is greater than that of Pioneer 3790 after the mid-dent stage, decrease in yield and the stover digestibility is not observed be-tween the mid-dent stage and about 10 days after this stage. Suitable planting density of Ohzora is 680 - 800 plants per are, and the adaptability of Ohzora to higher planting den-sity is better than that of Pioneer 3790 or 3845.},
 pages = {1--17},
 title = {サイレージ用トウモロコシの耐倒伏性・多収品種「おおぞら」の育成},
 volume = {180},
 year = {2004},
 yomi = {コイヌマ, ケイイチ and ミウラ, ヤスオ and サトウ, ヒサシ and エノキ, ヒロユキ and タカミヤ, ヤスヒロ and ミキ, カズヨシ}
}