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Sudan Journal of Agricultural Research
Estimation of genetic variability and broad sense
heritability of some traits in melon (Cucumis melo L.)
Taha, M.; ElJack, A.E.; Omara, S.
Abstract:
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.
Keywords:
Sudan Journal of Agricultural Research Vol. 8 (2007) PP. 51-57
