| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 2018467 | Plant Science | 2008 | 8 Pages |
Phylogenetic relationships among 48 accessions of sorghum (Sorghum bicolor), sudangrass (S. sudanense) and their relatives (S. propinquum, S. halepense, Zea mexicana, Z. mays) were investigated using SSR markers. The 91 SSR primer pairs generated a total of 723 polymorphic alleles, with an average of 7.945 alleles per locus, and a range of 2–19 alleles. The average genetic diversity, as measured by the polymorphic information content (PIC), was 0.783. The average polymorphic rates were 84.530% and 78.483% within sorghum and sudangrass, respectively. The PIC values were 0.774 and 0.770, respectively, and there was no significant difference (P > 0.05) between sorghum and sudangrass. Additionally, the genetic distance (GDsor–su) between sorghum and sudangrass was only 0.035, suggesting a high degree of genetic homogeneity. Genetic similarity (GS) values between all varieties ranged from 0.217 to 0.975 and were used to produce a dendrogram. The 48 accessions were clustered into five groups (GS = 0.766), specifically, group I (consisting of sorghum, sudangrass and sorghum–sudangrass hybrids), group II (S. propinquum), group III (S. halepense), group IV (Z. mexicana) and group V (Z. mays). Results of our analyses suggest the sudangrass/sorghum relationship is sufficiently close to place them both within the same species – sorghum (S. bicolor).
