水稲品種の低温発芽性と初期生育との関係 : 第5報 低温下における発芽と発根
スポンサーリンク
概要
- 論文の詳細を見る
The present studies were conducted to clarify the varietal differences of the radicle emergence under low temperature condition (15℃). The author used 46 new and old varieties which have been bred in Hokkaido and posses different degrees of germinability at low temperature. There were no seeds in which the radicle emergence of seminal roots preceded germination. The days from germination to the radicle emergence varied 2-4 days among all varieties and about 90% of the seeds commenced the radicle emergence at 6-8 days after germination. The plotted curves of the radicle emergence which began at 6-9 days and ended 12-14 days from seeding, closely resemble the plotted sigmoid curves in the germination at 15℃, although the initiation was delayed by 2-4days. Both the rooting coefficients and the number of days from germination to the radicle emergence indicated significant differences among varieties and the correlation coef ficients between both characters was highly significant showing r=-0.387. In contrast with this, a non-significant relation was recognized between the germination coeffients and the number of days from germination to the radicle emergence (r=-0.039). A partial correlation between the above characters was calculated by excluding thc effect of the germination coefficients and a highly significant value at a 0.1% level (r'=-0.919) was seen. It is assumed that the germination at low temperature are not always accompanied by the initiation of radicle emergence of seminal root which is controlled in such a way as to occur after the germination. Therefore it is possible that both characters are governed by different factors to some extent. Since a highly significant correlation existed between the germination and rooting coefficients (r=0.924), it seems to be of considerable importance that the varietal improvement promoting the germinability at low temperature may be effective for the selection of the high rooting ability which may lead to the breeding of a variety suitable for direct sowing floodcd paddy field in the cooler region.
- 日本作物学会の論文
- 1979-03-30
著者
関連論文
- 稲品種の低温発芽性に関する育種学的研究 : VI.雑種初期世代における低温発芽性の選抜が後代の主要農業形質に及ぼす影響
- 水稲早生良食味品種「きらら397」及び早生耐冷性糯品種の育成(第49回農業技術功労賞受賞記)
- 水稲新品種「きらら397」の育成について
- 葯培養による水稲育種
- 水稲新品種「たんねもち」の育成について
- 水稲品種の低温発芽性と初期生育との関係 : 第6報 籾の乾熱処理が低温発芽性と初期生育に及ぼす影響
- 北海道の耐冷性稲品種に関する母本能力の検定
- 水稲品種の低温発芽性と初期生育との関係 : 第5報 低温下における発芽と発根
- 稲品種の低温発芽性に関する育種学的研究-7-雑種初期世代の育成条件が低温発芽性および初期生育性に及ぼす影響
- 18. 水稲の低温発芽性に対する粒選抜の効果(I 年次講演会要旨)
- 株圧えによる湛水直稲の倒伏防止について (第137回 講演会)
- 水稲品種の低温発芽性と初期生育との関係 : 第4報 苗立性との関係