Growth Characteristics of Nursery Plants Regenerated Through in vitro Culture in Leek (Allium porrum L.)
T. Kanazawa, M. Hatakeyama, K. Sato, H.M. Xue, T. Harada and T. Yakuwa
The growth characteristics of leek (Allium porrum L.), regenerated through in vitro culture, were investigated. Leaf sprouts emerged from the ground 2 to 4 weeks after planting in the field. Adult foliage followed, and four to five leaves were produced by December. The following April the foliage began to elongate and the plant height increased. By July the leaves had completely expanded and bolting and flowering followed. The number of bulbs per plant at harvest was 6.2 in the control. However, they varied from 2.9 to 9.7 among the 29 lines under investigation. The fresh weight of bulbs per plant also ranged from 3.8 to 25.3 g. The relationship of the fresh weight of the bulbs between planting in 1995 and harvesting in 1996 was shown to be significantly positive (r = 0.86) and was also consistently stable. These results provide significant information on growth characteristics of plants regenerated through in vitro culture, and indicate that an individual selection by numbers and fresh weight of bulbs as an index, will increase the efficiency of cultivation.
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