Analysis of partial diallel crosses for tannin content in sorghum

Abstract

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