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内(?)4号杂交种是哲盟农研所于1983年用自选系3081与美国自交系M_(017)杂交组配而成。1991年经内蒙古农作物品种审定委员会审定命名。主要特征特性:生育期117天需≥10℃活动积温2600℃。幼苗绿色,紫鞘,拱土能力强,苗势壮,株高260～280厘米,穗位100厘米。叶片20～21片,活秧成熟。果穗筒型,红轴,穗长24～26厘米,穗粗4.9厘
The crossbred (No. 4) hybrid was formed by crossbreeding with the American inbred line M_ (017) in 1983 by Zizhu Agricultural Research Institute. In 1991 by Inner Mongolia Crop Variety Approval Committee named after. Main characteristics and characteristics: Growth period of 117 days required ≥ 10 ℃ active accumulated temperature 2600 ℃. Seedlings green, purple sheath, arch earth ability, Miao Zhuang strong, plant height 260 ~ 280 cm, ears 100 cm. 20 to 21 leaves, live seedlings mature. Ear barrel type, red axis, spike length 24 ~ 26 cm, ear diameter 4.9%