Studies on Heterosis for yield and its Attributing Traits in Tomato (Solanumlycopersicum L.)

Twenty eight hybrids of tomato developed using eight parents (PusaRohini, PusaGaurav, Roma, Cherry Orange, Selection-1, Taiwan, N-5 and C-10-15-27-3) in half diallelfashion were studied for estimation of heterosis for yield and its attributing traits. Hybrids PusaGaurav x Taiwan, PusaRohini x PusaGaurav and PusaRohini x Roma were found most promising for yield and its contributing traits. These hybrid exhibited heterosis to the tune of 48.14%, 44.47% and 73.41% over better parents and 83.43%, 76.78% and 74.24%, respectively over the check cultivar for fruit yield per plant. The cross combination PusaGaurav x Taiwan expressed highest significant standard parent heterosis and SCA estimates for yield and its attributing traits and it was identified for evaluation in multilocation trail and commercial exploitation.

Hybrids Viz. PusaGaurav × Taiwan, PusaRohini × PusaGaurav and PusaRohini ×Roma were found to be betterheterotic combinations for yield.

F₁ hybrid PusaGaurav × Taiwan expressed 83.43% heterosis for yield over standard parentmay be recommended for commercial exploitation.