Muskmelon is one of the most important and widely grown crop of Cucurbitaceae family, despite having tremendous nutritive and medicinal value it needs to improved genetically in order to overcome the problems like poor shelf life, thinner fruit flesh, and larger seed cavity, late flowering and fruit maturity. An investigation was undertaken to evaluate the extent of heterosis in intraspecific hybrids between selected genotypes of muskmelon and Mangalore melon during kharif 2019 and rabi 2020. A total of 15 intraspecific hybrids were developed by crossing 4 varieties of muskmelon and 7 accessions of Mangalore melon. Hybrids were developed using hand emasculation and hand pollination technique and the developed hybrids were evaluated using RCBD design with two replications. The results showed that, out of the 15 intraspecific hybrids, 11 intraspecific hybrids showed significant positive heterosis over mid parent and only four intraspecific hybrids were found to be superior to th

Intraspecific hybrids, Muskmelon, Mangalore melon, heterosis, shelf life.

Out of the 15 intraspecific hybrids, 11 intraspecific hybrids showed significant positive heterosis over mid parent and only four intraspecific hybrids were found to be superior to the better parent for fruit yield per vine. The intraspecific hybrids Haramadhu X MS 78 exhibited highest and significant heterosis over both mid parent (53.20%) and better parent (42.02%) followed by Haramadhu X MS 28 (33.71% and 20.33%) and Haramadhu X MS 30 (26.03% and 15.66%). From the overall study, the results were summarized that the intraspecific hybrid Haramadhu X MS 78 showed highest and significant heterosis over both mid parent (53.20%) and better parent (42.02%) with the yield capacity of 3.75 kg per vine. Apart from that the quality traits such as flesh thickness, TSS and shelf life the hybrid ArkaSiri X MS 17 found to be superior compared to other hybrids and it can be further evaluated in segregating generations to identify desirable progeny for said quality traits with mus

Kalgudi, A., Shet, R.M., Shantappa, T., Lakshmidevamma, T.N., Hongal, S. and Rathod, V. (2021). Assessment of Heterosis in Intraspecific Hybrids derived from Muskmelon (Cucumis melo L.) and Mangalore melon (Cucumis melo var. acidulous) for Yield and Qua