Karyomorphology of Fourteen Cultivars in Cut Chrysanthemum

ACTA HORTICULTURAE SINICA ›› 2007, Vol. 34 ›› Issue (5): 1235-1242.

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Karyomorphology of Fourteen Cultivars in Cut Chrysanthemum

LI Chang;CHEN Fa-di^*;ZHAO Hong-bo; FANG Wei-min

(College of Horticulture, Nanjing Agricultural University,Nanjing 210095,China)

Received:1900-01-01 Revised:1900-01-01 Online:2007-10-25 Published:2007-10-25

Abstract

Abstract: 〗Fourteen cultivars of cut chrysanthemum (Dendranthema×grandiflorum) were karyomorphologically studied by conventional pressed slice method. The results showed that: (1) The interphase nuclei and prophase chromosomes of all cultivars were found to be of the complex chromocenter type and the interstitial type respectively. (2) The somatic chromosomes showed polysomaty whether within or among cultivars. The range of chromosome numbers was from 48 to 56, and 54 was preponderant. (3) Karyotype was diverse and consisted of metacentric, submetacentric and acrocentric chromosomes. Cultivars of ‘Shenma’,‘Xiaohongniang’,‘Jiuyuehuang’, ‘Xiaoju Shuangse’ possessed 1 or 2 satellites. The relative length of chromosome varies from 2.04% to 5.26%, asymmetry index was between 62.39% and 67.32%. The karyotype type of ‘Changzi’, ‘Italy Red’, ‘Xiaohongniang’,‘Aligesi’belonged to “2B”, the others belonged to “2A”. (4) All the cultivars were normal divided in anaphase and telophase besides ‘Qinglu’. In addition, karyotype diversity and evolutional trend in cut chrysanthemums were discussed bases on results.

Key words: Chrysanthemum, Cut chrysanthemum, Chromosome, Karyotype, Karyomorphology

LI Chang;CHEN Fa-di;ZHAO Hong-bo;FANG Wei-min. Karyomorphology of Fourteen Cultivars in Cut Chrysanthemum[J]. ACTA HORTICULTURAE SINICA, 2007, 34(5): 1235-1242.

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Karyomorphology of Fourteen Cultivars in Cut Chrysanthemum

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