ANALYSIS OF PARTIAL DIALLEL CROSSES FOR TANNIN CONTENT IN SORGHUM

With the objective of estimating genetic compounds for averages in tan nin content in sorghum [Sorghum bicolor (L.) Moench], an experiment of partial diallel crosses (5 x 4) was carried out. Inbreds with no tann in were identified as parents of group 1 and parents of group 2 the in breds with tannin. The results showed that phenol content in the grain varied between 0.110% and 0.290% equivalent tannic acid for the inbre ds of group 1 and 1.869% and 2.753% for the group 2. The hybrids showe d values between 0.897% and 2.067%. It was shown that the genetic cont rol of tannin content was mainly additive. The estimatives for combini ng ability allow to identify inbreds which can be used in plant breedi ng programs, intending to obtain sorghum with no tannin or with tannin in the grain.