Abstract
The genetic diversity of 70 Houttuynia Thunb. accessions from Sichuan, Chongqing, Guizhou and Jiangsu province in China were tested by using random amplified microsatellite polymorphism (RAMP) markers. All of the 43 primer combinations were found to amplify polymorphic products. A total of 304 products were amplified. Of which, 97.7 products were polymorphic. 6.9 polymorphic bands were amplified by each primer combination on average. The genetic similarity (GS) between the accessions within H. emeiensis and H. cordata were 0.660 and 0.575, respectively. The GS between two species was 0.525. The GS values between H. emeiensis and the H. cordata cytotype with the chromosome number of 36 was 0.559, higher than that between H. emeiensis and the cytotypes of H. cordata with other chromosome numbers. Within the species H. cordata, the genetic variation between cultivated and wild accessions was insignificant. The results of cluster analysis by using UPGMA method showed that all the tested accessions could be differentiated by RAMP markers, and classified into 11 groups. Many accessions with the same chromosome numbers could be classified together. The genetic diversity was more plentiful in mountainous and margin areas of the Sichuan Basin than at the bottom of the Basin and the highlands or hills surrounding it. It was concluded that there existed higher genetic diversity at the molecular level (RAMP markers) among the germplasm resources of the genus Houttuynia. The genetic relationships and phylogeny of the germplasm resources of Houttuynia were also discussed.
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Wei, W., Youliang, Z., Li, C. et al. Genetic Diversity among the Germplasm Resources of the Genus Houttuynia Thunb. in China based on RAMP Markers. Genet Resour Crop Evol 52, 473–482 (2005). https://doi.org/10.1007/s10722-005-2261-1
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DOI: https://doi.org/10.1007/s10722-005-2261-1