著者
謝花 治 宮城 克浩 伊禮 信 宮平 永憲 金城 鉄男 島袋 正樹 神谷 寿幸 仲宗根 盛雄 前田 剛希 大城 良計 出花 幸之介 正田 守幸 恵比寿 則明 伊志嶺 正人 高江洲 賢文 大工 政信 神門 達也 平田 清勝 平田 清信
出版者
沖縄県農業研究センター
雑誌
沖縄県農業研究センター研究報告 = Bulletin of the Okinawa Prefectural Agricultural Research Center (ISSN:18829481)
巻号頁・発行日
no.3, pp.55-65, 2009-04

サトウキビ「Ni17」は、風折抵抗性が強く株出し多収性の品種を育成することを目標に、沖縄県農業研究センター作物班において「NiF8」を種子親に「RF79-247」を花粉親とした交雑後代から選抜・育成した。「RK91-1004」の系統名で鹿児島県の奄美以南の離島を含む南西諸島の生態地域において適応性が検討された。その結果、沖縄県久米島および鹿児島県奄美地域において優秀性が認められ、2002年に新品種さとうきび農林17号「Ni17」として命名登録され、奨励品種に採用された。「Ni17」の特性は以下のとおりである。1)風折抵抗性が優れる。2)台風時の潮風害による糖度低下が少なく、収穫期の糖度が高い。3)萌芽性が良く、株出し収量および可製糖量が多い。4)耐倒伏性が優れる。
著者
高江洲 賢文 中川 恭二郎
出版者
日本雑草学会
雑誌
雑草研究 (ISSN:0372798X)
巻号頁・発行日
vol.30, no.1, pp.p51-57, 1985-05

This study was carried out to analyse the pattern of organ formation, particularly the daughter bulb formation. 1) The scales of the mother bulb (MB) were oriented on a generic spiral, which was reached to the tops, at the phyllotaxis of 3/8. No increase of the scales was observed during the vegetative period. Radical leaves were formed on the generic spiral elongating to the tops at the phyllotaxis of 3/8. 2) One primary daughter bulb each (DB1) was generated on the axiles of both radical leaves and scales. The number of primary daughter bulbs of the scales (DBS1) was almost equal to that at the initial stage. On the other hand, the number of primary daughter bulbs of the radical leaves (DBL1) corresponded with that of the leaves because at the initial stage a daughter bulb was transformed into a flower bud. These results suggest that the morphogenesis of the flower bud may be affected by intrinsic factors of the plants. 3) DB1 was formed most rapidly on the middle nodes, where the phyllotaxis was changed from scales to radical leaves. DBL1 formation was acropetal and DBS1 formation was basipetal. These findings suggested that the differences in the formation of DB1 may be one of the effective methods for reproductive strategy. 4) Some scales of the DB1 (SDB1) did not change but other developed to radical leaves of the DB1 (LDB1), indicating that DB1 can be come adapted to various environments. This plasticity may be an important character for this species. 5) Secondary daughter bulbs (DB2) were formed from the basal nodes to the top ones at the axile of DBI regardless of the type of leaves. A large number of DB2 were generated on the middle nodes of MB. 6) MB produced many adventitious roots at the base, which were fibrous in the early stage but become enlarged and formed root tubers subsequently.