Estimation of heterosis and parents genetic behavior in some Sorghum hybrids utilizing cytoplasmic male sterility technique

This study was conducted at the General Commission Of Scientific Agricultural Research (GCSAR) for tow consecutive years, 2000-2001, to estimate the heterosis of some sorghum hybrids utilizing cytoplasmic male sterility technique, and to determine the behavior of the parents used in hybridization concerning their relation to the cytoplasmic male sterility. Hybrids were planted in a randomized complete block design, including 43 hybrids in tow replications. The results showed variation among parents characters, because they were selected from different environments and also differ in genetic components. positive heterosis was recorded form crosses involved foreign parents with local ones, or foreign hybridized with foreign. positive heterotic values for earliness and productivity were obtained . The genetic constitution of the male parent was assessed as R-line (restoring of the A-line), and B-line (maintainer of the A-line).