A KARYOTYPE ANALYSIS OF CATELPA DUCLOUXII DODE[J]. Journal of Southwest Forestry University, 1991, 11(1): 29-32. DOI: 10.11929/j.issn.2095-1914.1991.01.004
Citation: A KARYOTYPE ANALYSIS OF CATELPA DUCLOUXII DODE[J]. Journal of Southwest Forestry University, 1991, 11(1): 29-32. DOI: 10.11929/j.issn.2095-1914.1991.01.004
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A KARYOTYPE ANALYSIS OF CATELPA DUCLOUXII DODE

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  • The karyotype and chromosome number of Catalpa duclouxii Dode, were analysed on meristematic cell of root tips.The result has shown that the chromosome number in each somatic cell is 2n=40, and all chromosomes have median centromeres.The 15th pair is SAT-chromosome.According to the classification made by Levan et al., the karyotype formula is K(2n)=40=38m+2m15sat. According to the ratio of chromosome Iength(largest/smallest > 2) and the proportion of chromosomes with arm ratio < 2 in the complement, the karyotype of Catalpa duclouxii Dode is Stebbins' "1B" of symmetrical karyotype.
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