Abstract
Karyotypes of six wild buckwheat species from Sichuan Pan’xi Regions of China were investigated in present study. This study will help in understanding evolutionary mechanisms and relationships among the taxes in this section. The karyotypes of three species, F. densovillosum, F. gracilipes var. odontopterum and F. gracilipes are being reported for the first time. F. esculentum, F. cymosum, F. tataricum and F. densovillosum are diploid while F. gracilipes var. odontopterum and F. gracilipes are tetraploid, 2n = 4x = 32. At diploid level, the variation of the buckwheat chromosome karyotypes is bigger; however, on the tetraploid level, it shows a higher similarity. The karyotype evolutionary trend of buckwheat indicated that F. densovillosum seemed to be more advanced than F. gracilipes var. odontopterum and F. gracilipes. F. densovillosum, F. gracilipes var. odontopterum. and F. gracilipes were found more closely related genetically whereas F. tataricum clustered into a separate group. F. esculentum and F. cymosum clustered together in one separate group.
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This work was supported by key scientific project of Sichuan, China (04NG001-015).
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Yang, Xy., Wu, ZF., Chen, H. et al. Karyotype and genetic relationship based on RAPD markers of six wild buckwheat species (Fagopyrum spp.) from southwest of China. Genet Resour Crop Evol 57, 649–656 (2010). https://doi.org/10.1007/s10722-009-9500-9
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DOI: https://doi.org/10.1007/s10722-009-9500-9