Heterotic vigour studies in forage sorghum hybrid by multiple criteria

Abstract

The parental lines PC-23 R, 2219 A and 2219 B were used to produce the forage sorghum hybrid, PCH-106 under 5 different planting ratio of seed and pollen parent viz 4:2, 6:2, 8:2, 10:2 & 12:2 and also with 3 times of staggered sowing of R line each after 7 days under 4:2. The impact of hybridity in F1 seed was highly significant and positive over parental lines. The hybrid seed, produced through different planting ratio and staggered planting under test were significantly vigorous over parent with respect to most of the vigour test except PC-23 R, result at par with hybrid seed in first count and speed of germination. The influence of planting ratio and staggered planting of pollen parent in hybrid seed production with respect to seed vigour was non significant.