Karyotype of Four Species in Buddleja ( Loganiaceae) * |
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Authors: | CHEN Gao- Sun-Wei-Bang- |
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Affiliation: | 1.Kunming Insti tute of Botany , Chinese Academy of Sciences, Kunming 650204, China;2.Graduate School of the ChineseAcademy of Sciences, Beijing 100039, China |
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Abstract: | The chromosome numbers and karyotypes of the 4 species in genus Buddleja were reported. The karyotype formulas are 2n= 2x= 38= 22m+ 16sm ( B1 yunnanensis) , 2n= 2x= 38= 26m+ 10sm+ 2st ( B1 crispa) , 2n= 2x= 38= 20m+ 16sm+ 2st ( B1 off icinalis ) , and 2n= 2x= 38= 20m+ 16sm+ 2st ( B1japonica) . Karyotype of B1japonica belongs to Stebbins. s 2B type and other 3 species belong to Stebbins. s 2A type. Based on the cytological data ( karyotypes and the recorded chromosome numbers) and the species morphologies, the evolution trend of the two series in Sect1Neemda was briefly discussed. |
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