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20191
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Subject: Horticulture × Author: Gurpreet Singh × Start date: 1947 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Heterosis and combining ability studies in watermelon for yield and quality traits [Citrulus lanatus (Thunb.) Matsum. & Nakai]
    (Punjab Agricultural University, Ludhiana, 2019) Gurpreet Singh; Rajinder Singh
    The present investigation entitled “Heterosis and combining ability studies in watermelon for yield and quality traits [Citrulus lanatus (Thunb.) Matsum. & Nakai]” was carried out at the Department of Vegetable Science, Punjab Agricultural University Ludhiana, India, during 2017-2018 and 2018-2019. Ten lines were crossed with four testers in a line x tester fashion and forty hybrids were assessed for various yield and quality attributes. Magnitude due to general combining ability (GCA) and specific combining ability (SCA) was found significant for most of the traits, indicating importance of both additive and non additive gene control in the inheritance of traits. The ratio of σ2SCA/ σ2GCA was more than unity indicating more influence of non additive genetic control except for days taken to first fruit harvest, number of fruits per plant, TSS and total carotenoids. The tester Arka Manik and Sugar Baby were good general combiners for most of the yield and quality parameters. While, among lines, EC-829875, WM-14 and EC-829870 were good combiners for most of the traits. The F1 Hybrids EC-829870 x Arka Manik for fruit number per vine, EC-829826 x Sugar Baby for total yield per acre, EC-829870 x Sugar Baby for number of days to first fruit harvest and 100 seed weight, WM-53 x EC-829852 for average fruit weight, EC-829826 x EC-829827 for seed number per fruit, EC-829870 x EC-829827 for TSS content and EC-8298226 x EC-829852 for lycopene content were stood out good specific combiners. The hybrids EC-829870 x Arka Manik for vine length, TSS and lycopene content, EC-829823 x EC-829852 for total fruit yield per plant, WM-14 x EC-829827 for number of fruits per plant, EC-829826 x Arka Manik for average fruit weight, number of primary branches, WM-53 x EC-829827 for internode length and EC-829870 x Sugar Baby for 100 seed weight were exhibited highest heterotic effect over better parent (BP). The hybrids EC-829870 x Arka Manik for vine length, EC-829826 x Aarka Manik for number of primary branches, EC-8829858 x Arka Manik for days to harvest first fruit, EC-829875 x Arka Manik for total fruit yield per plant, WM-14 x Sugar Baby for number of fruits per plant, EC-829826 x Arka Manik for average fruit weight, , EC-829823 x EC-829827 for internode length and KFF 1-1-2 x Sugar Baby for TSS were exhibited highest standard heterotic effect over check. The present investigation revealed that hybrids EC-829870 x EC 829827, WM-14 x sugar Baby, KFF 1-1-2 x Arka Manik were promising hybrids in terms of yield and quality traits and can be exploited commercially.