Vegetos

Abstract

Present study was carried out to estimate combining ability and heterosis for fibre yield and yield attributing characters among diverse tossa jute germplasm lines and in 21 F₁ hybrids derived from 7x7 half diallel mating design. Analysis of variance revealed significance of parent s vs hybrids for most of the characters indicating presence of heterosis. High gca effects for fibre yield, plant height and green weight was recorded by OIN-255. High significant sea effects for fibre yield were recorded in OMU-19 x OMU-27 (19.53") and OIN-255 x OEX-32 (15.50") crosses. Variances for general combining ability and specific combining ability were significant for few characters indicating additive and non-additive gene actions for those characters. High standard heterosis for fibre yield was recorded by OMU-19 x OMU-27 (41.01") and OIN-255 x OEX-32 (32.47") crosses. Genetic parameters indicated that plant height, green weight and stick weight were controlled by additive gene action and basal diameter and fibre yield controlled by non-additive gene action.