EFFECT OF GENOTYPES BY LOCATIONS INTERACTION ON ECONOMICAL TRAITS OF SQUASH | ||||
| Journal of Plant Production | ||||
| Article 15, Volume 29, Issue 10, October 2004, Page 5667-5687 PDF (5.66 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2004.238849 | ||||
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| Authors | ||||
| A. H. Abd EI- Hadi,1; Scher E. A. EI-Gendy2 | ||||
| 1Dept. of Genetics.,Fac. of Agric., Mans. Univ., Egypt. | ||||
| 2Horticultural Res.lns.,Vegetable Research Station, ARC, Egypt. | ||||
| Abstract | ||||
| This study was carried out to investigate the nature of genetic behavior of economical traits in squash at two locations. These locations were EI-Bramoun Research Station (ARC) and Kalabsho Research Station, Fac. of Agric. Mans. University. Complete diallel cross mating design was used to obtain 12 F1 hybrids among four parental varieties. The results cleared the presence of significant genetic variability among evaluated genotypes as well as among genotypes by locations interactions. The results also indicated that the means of most studied traits of the F1 hybrids significantly exceeded the mid-parents. Thus, significant values of heterosis versus the mid-parents were obtained. The highest values of heterosis were 135.4% for white buch x Giado in F.Y./Pt (kg) from the combined data and 167.0% for Eskandrani x Zucchino 544-005 at the second location for the same trait. The results also revealed the presence of some promising F1 hybrids which exceeded the better parent and showed desirable heterosis values against the better parent ( B.P). The highest value of heterosis (B.P.) was 194.6% for F.Y./Pt.(kg) at the second location for the F1 hybrid (Giado x Zucchino 544-005). The results of the analysis of variance of diallel crosses mating design indicated that the mean squares of GCA, SCA, GCA x Land SCA x L showed highly significance for most studied traits at each location and over both locations. Concerning genetic parameters, the results illustrated the importance of both additive and non- additive genetic variances including dominance in the inheritance of studied traits. The obtained heritability values in broad sense were larger than their corresponding values in narrow sense for all studied traits. The results also investigated that the Eskandrani and White buch were the best combiners in the second location and the first location, respectively for most studied traits. | ||||
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