PERFORMING SOME INBRED LINES OF SQUASH FOR EARLINESS AND VEGETATIVE GROWTH TRAITS IN DIFFERENT LOCATIONSNadi Awad Al-Harbi, Mohamed A. Abdein, Ehab I. El-Hallous, Amaal Mohammadein and Asmaa A. Hamad
Significant differences were observed between the two locations for all studied traits except both vinelength (VL) and number of leaves per plant (NoLP) traits. The results obtained over seasons, indicated the superiority of Dumat Al-Jandal (L1) location than Rafha (L2) location in all studied traits except VL, days to the first male flower (D1MF) and days to the first female flower (D1FF) in most inbred lines. It is interesting to note that, some inbred lines behaved constantly at both locations, i.e., inbred line IL5 with most vegetative growth traits and all inbred lines in both number of leaves/plant and vine length. Inbred line and location interaction were significant in all traits revealing that some inbred lines were superior in all locations, as an average of both season. Furthermore, location had the major effect on the relative genotypic potential of these traits, in which the inbred lineÃ location interaction was highly significant. The best inbred line which ranked the first in the studied traits was inbred lineIL5 for the earliness followed by inbred lineIL6 in D1MF, in both locations. Slight variations were detected between genotypic (GCV) and phenotypic (PCV) coefficients, indicating the importance of the genetic effects in controlling the inheritance of traits under these environments and referring to highly genotypic variances resulted in high or moderate estimates of broadsense heritabilities which, in turn, suggesting that phenotypic selection could be efficient.