Heterosis for juice yield and its attributing traits in sweet sorghum Sorghum bicolor (L.) Moench.

摘要

An investigation was carried out to assess the extent of heterosis for juice yield and its attributing traits in 72 hybrids of sweet sorghum developed by crossing four lines with 18 testers in Line x Tester mating design during kharif of 2009. The mean sum of squares of parents vs hybrids was significant for all the characters except mean internodal length, indicating presence of heterosis for these traits. None of the crosses were superior for all the traits studied. However, the cross ICSA 749 x SPV 1411 was the best as it had highest mean performance for economically important characters. Majority of the crosses exhibited significant better parent heterosis for days to 50% flowering, cane height, cane weight, mean internodal length, juice volume, juice extraction percent and juice yield indicating predominance of non-additive gene action in the genetic control of these traits. Most of the hybrids expressed significant standard heterosis for all the characters over the check NTJ 2.