Heterosis and combining ability for yield and quality traits in bottle gourd (Lagenaria siceraria (Mol.) Standl.)
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Date
2016
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Punjab Agricultural University, Ludhiana
Abstract
A study was conducted to assess the extent of heterosis and combining ability of bottle gourd in a half diallel mating design under two different season as set-1 (rainy season, 2015) and set-2 (summer season, 2016) at Vegetable research farm, Department of Vegetable Science, PAU, Ludhiana. Twenty eight F1 hybrids and eight parental lines were evaluated for fifteen different characters. In both the seasons, hybrids and parents were evaluated with commercial check Vardan. In rainy season, PSPL was good combiner for marketable yield per plant and PBOG-8 was good combiner for fruit weight, number of fruit per plant, dry matter and ash content. Hybrid Gutka Long x Pusa Naveen had significant positive specific combining ability for marketable yield per plant in rainy season. PBOG-7 x PBOG-8, Punjab Komal x Punjab Barkat were found to be the promising ones for number of fruits per plant and marketable yield. The maximum significant positive heterosis was found in Punjab Komal x PSPL (54.02%), Punjab Komal x PBOG-8 (51.94%) and PSPL x Gutka Long (50.28%) for marketable yield over check Vardan. For the quality character ascorbic acid, PSPL x Pusa Naveen, PSPL x Punjab Barkat and Pusa Naveen x PBOG-8 showed highly significant positive heterosis over the check in rainy season. The cross combination of Punjab Komal x PSPL, Punjab Komal x PBOG-8 and PSPL x Gutka Long were high yielders with the yielding potentialities of 5560, 5485 and 5425g/plant marketable yield. During summer season, PBOG-8 was good combiner for fruit weight, marketable yield, vine length, dry matter and ash content. 13 hybrids over Vardan showed significantly positive heterosis among 28 hybrids and five best were Punjab Komal x PSPL (41.32%), Punjab Long x Gutka Long (40.94%), Punjab Komal x Punjab Barkat (26.99%), Gutka Long x Pusa Naveen (25.07%) and PSPL x Pusa Naveen (22.32%). Punjab Komal x PSPL and Gutka Long x Pusa Naveen showed significantly positive heterosis for fruit weight and marketable yield. Punjab Komal x PSPL, Punjab Long x Gutka Long and Punjab Komal x Punjab Barkat were high yielders with the yielding potentialities of 5378.79, 5364.51 and 4833.33 g/plant marketable yield.
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Keywords
Bottle gourd, diallel analysis, heterosis, general combining ability, specific combining ability