Linum 屬の細胞學的研究 (第一報)

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  • 菊地 武直夫
    From the Laboratory of Special Crops, College of Agriculture, Hokkaido Imperial University

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タイトル別名
  • CYTOLOGICAL STUDIES OF THE GENUS <i>LINUM</i>, I.

抄録

The results obtained from the above mentioned investigations may be summarized as follows:<br>1. According to the chromosome number, species of Linum used by the writer may be classified into four groups having 9, 15, 18 and 43 (?) in haploid numbers respectively.<br>2. The difference in the size and shape of chromosome was not noted in both gametic and somatic cells.<br>3. L. usitatissimum did not reveal any variation in the chromosome number, showing always x=15 and 2x=20<br>4. In the hybrid of L. perenne×L. alpinum, chromosome number in the somatic cell of F1 is the sum of gametic ones of the parental plants, i. e. 9+18=27.<br>5. In the heterotypic division of pollen mother cells of F2 plant, there is seen the irregular chromosome behavior, where 9 lagging univalent chromosomes separate at random to each pole, and in the homeo-typic metaphase various numbers of chromosomes from 9 to 18 were counted.<br>6. In the karyological observation of F2 plants, 20, 28 and 34 somatic chromosome numbers were detected in young root tip cells.

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