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日本北海道立中央农业试验场生物技术研究室利用小豆胚轴培养技术采种获得成功。胚轴培养是在小豆种子发芽出土后的初生阶段,从长到5～8厘米的胚轴(子叶与初生叶期的茎)上切下1厘米左右进行培养。
Japan Hokkaido Central Agricultural Experimental Biotechnology Laboratory using small bean hypocotyl cultivation technology success. Hypocotyls are cultivated in the nascent stage after germination of adzuki bean seeds from the hypocotyl (cotyledons and stems at the primary leaf stage) up to 5 to 8 cm in length.