Abstract:The percent selfed seed set of 140 sorghum F_1 produced by A_2 malesterile lines were evaluated in period 1983~1985.The female of F_1 usedin our experiments were A_2 TAM428,A_2 Tx624 and A_2 Tx3197,themale lines consisted of 25 maintainers of sterility in A_1 male sterilelines,15 restorers of ferti