Introduction of Male Sterile Line Tift85DA_4 and Hybrid Seed Production of Pennisetum Americanum×Pennisetum Purpureum.

A newly_introduced male sterile line Tift85DA\-4 and interspecific hybridization of Pennisetum americanum and Pennisetum purpureum were studied. The results indicated that Tift85DA\-4 can adapt to the environment in Nanjing area. During the suitable planting period, the whole growth period of Tift85DA\-4 was decreased as planting date was postponed, but the main stem has the steady number of leaves, 22 to 23 leaves. Tift85DA\-4can produce seeds well as male parent plant, Pennisetum purpureum,provided enough pollen. The results also illuminate that flowering time of maternal and paternity can meet well treated the paternity(Pennisetum purpureum var.N 51 )with black plastic cloth when Tift85DA\-4 grows to 14 to15 leaves.