Cytogenetic studies on <i>Chrysanthemum cinerariaefolium</i> and <i>Chrysanthemum coccineum</i> 1

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  • 除虫菊の細胞遺伝学的研究 .1
  • ジョチュウギク ノ サイボウ イデンガクテキ ケンキュウ 1
  • External characters and contents of pyrethrin in the polyploids of <i>Chrysanthemum cinerariaefolium</i>
  • シロバナノムシヨケギクの倍数体の形態およびピレトリン含有量の比較

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Abstract

1) The writer found triploids, tetraploids and aneuploids in Chrysanthemum cinerariaefolium.<br>2) The growth of the triploids are much more vigorous than the diploids and tetraploids, their stems being higher than the tetraploids. The capitulum has intermediate characters of the diploids and tetraploids.<br>The growth of the tetraploids are more vigorous than the diploids: their stems are higher, culms and leaves are thicker, and the weight of the capitulum are twice as heavy as those of the diploids.<br>3) The contents of pyrethrin in the triploids are in general about the same as in diploids, while the contents in the tetraploids are lower than those in the diploids.

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