Estimation of genetic variability and broad sense heritability of some traits in melon (cucumis melo l.)
2007
Taha, M., University of Gezira, Wad Medani (Sudan). National Institute for promotion of Horticultural Exports | Eljack, A.E., University of Gezira, Wad Medani (Sudan). Faculty of Agricultural Sciences | Omara, S., Ministry of Agriculture, Animal Resources and Irrigation
Experiments were conducted with an objective to study the magnitude of variability existing among the available germplasm of sweet melon (Cucumis melo var. reticulatus). We tested thirteen lines representing different melon types in a randomized complete block design (RCBD). Genotypic coefficient of variation (GCV%) and broad sense heritability (BSH) were estimated for different traits in melon. High estimates of GCV% were found for netting density (83.31%) and fruit weight (59.42%). Netting development (28.18%) and earliness (13.76%) exhibited moderate GCV%, whereas other traits including netting appearance (9.23%), plant length (9.28%), netting callus weight (5.94%) and yield /vine (2.22%) had low GCV%. Results pointed out the importance of the netting density, netting development and type of netting as major factors affecting the fruit appearance. High broad sense heritability (BSH) estimates were found for earliness (83.60), netting appearance (79.33), and fruit weight (77.25). The BSH for vine length (58.31), netting density (52.23), and number of fruits/vine (64.74) were considered as moderate, whereas netting callus weight was found to be low in BSH (39.81). Genotypic variation for different traits in the selected lines was significant. Grouping of different lines into American, Charentais, Spanish, Ogen, Ananas, and Sudan type could meet the demand of local and exportable standards and facilitate handling and use of these lines in breeding programs. The results revealed that possible combinations among these lines could result in hybrids and segregates exhibiting apparent heterosis for the different characters concerned. Results also indicated the importance of improving cultural practices of melon production to enhance yield and quality of the crop
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