Author(s):

Rajneesh and VB Singh

Abstract: The present study was conducted with the objective to find out the extent of heterobeltiosis and standard heterosis. The study comprised F₁ hybrids developed through diallel mating design (excluding reciprocals) with the crosses of 9 diverse lines of sponge gourd. The F₁ hybrids and their parents were evaluated for two consecutive years. The observations were recorded on growth and yield attributes. The heterosis for marketable fruit yield per plant ranged from -39.05 (P₁ x P₄) to 46.86 per cent (P₃x P₉) over better parent and over standard variety it varied from -34.55 (P₄ x P₇) to 48.02 per cent (P₃ x P₉) in Y₁. However, in case of Y₂ heterobeltiosis ranged from -32.65 (P₁ x P₄) to 44.81 per cent (P₃x P₉) and standard heterosis for fruit yield varied from -29.15 (P₄x P₇) to 44.81 per cent (P₃ x P₉). Out of 36 crosses five best heterotic crosses for marketable fruit yield per plant P₃ x P₉ (46.86 and 44.81 %) and P₂ x P₃ (26.42 and 27.19 %) were found common in both the years (Y₁ and Y₂) over better parent, while the crosses P₃ x P₉ (48.02 and 44.81%), P₆ x P₉ (44.06 and 38.14 %) and P₁ x P₈ (33.12 and 39.53 %) were found common over standard variety Pusa Chikni during both the years. Crosses P₃ x P₉, P₁ x P₈ and P₁ x P₂ were the best common crosses for fruit yield and number of fruits per plant over standard parent in both the seasons.

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