The agronomic characters and SRAP genetic diversity analysis of 21 introduced male sterile lines of brown midrib forage sorghum

The agronomic characters and SRAP genetic diversity of 21 introduced male sterile lines of brown midrib forage sorghum (Sorghum bicolor) were investigated. The results showed that the stem diameter and leaf width were largest in BMP17, being 29.97 mm and 9.88 cm, respectively. The stem-leaf ratio in BMP20 was significantly higher than that in the other germplasms (P<0.05). A total of 74 bands were generated, of which 64 (86.5%) were polymorphic. The average value of polymorphic information content was 0.49. The genetic similarities among the 21 accessions ranged from 0.086 to 0.977. The dendrogram indicated that the 21 sorghum collections were grouped into three clusters at a genetic distance of 0.488. The genetic basis was narrow for the 21 sterile lines of Sorghum.