Chromosome number variation in a promising oilseed woody crop, Plukenetia volubilis L. (Euphorbiaceae)

文献类型: 外文期刊

第一作者: Cai, Z. Q.

作者: Cai, Z. Q.;Zhang, T.;Jian, H. Y.

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关键词: chromosome number;karyotype;Plukenetia volubilis;polyploidy

期刊名称:CARYOLOGIA ( 影响因子:0.918; 五年影响因子:0.846 )

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收录情况: SCI

摘要: Cytology of a promising oilseed woody crop, Plukenetia volubilis, was analyzed for the first time here. There are in total 11 different chromosome numbers, ranging from 2n = 50 to 2n = 86 in P. volubilis. Different numbers were found not only in different root tips but also in different cells of the same tip. Among the cells, 2.78% cells had the lowest chromosome number of 2n = 50; and 1.39% cells had the highest chromosome number of 2n = 86. The most common chromosome number is 2n = 58 and about 27.79% cells had this quantity of chromosomes. The chromosomes were extremely small in size, at less than 2 μm. Thus, analysis of chromosome morphology was impaired. Polyploidy, confirmed as the significant evolutionary trend in chromosome number within this species, is briefly discussed. This species is a problematic and polymorphic taxon and our results indicate that its polyploidy can be regarded as the reason.

分类号: Q2

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