Abd EI-Hadi,, A., EI-Sherbeny, G., EI-Magrabi, A. (2006). GENETIC BEHAVIOR FOR SOME IMPORTANT ECONOMICAL TRAITS AND THE NATURE OF RESISTANCE FOR POWDERY MILDEW IN SQUASH.. Journal of Plant Protection and Pathology, 31(1), 501-513. doi: 10.21608/jppp.2006.235163
A. H. Abd EI-Hadi,; G. A.R. EI-Sherbeny; A. A. EI-Magrabi. "GENETIC BEHAVIOR FOR SOME IMPORTANT ECONOMICAL TRAITS AND THE NATURE OF RESISTANCE FOR POWDERY MILDEW IN SQUASH.". Journal of Plant Protection and Pathology, 31, 1, 2006, 501-513. doi: 10.21608/jppp.2006.235163
Abd EI-Hadi,, A., EI-Sherbeny, G., EI-Magrabi, A. (2006). 'GENETIC BEHAVIOR FOR SOME IMPORTANT ECONOMICAL TRAITS AND THE NATURE OF RESISTANCE FOR POWDERY MILDEW IN SQUASH.', Journal of Plant Protection and Pathology, 31(1), pp. 501-513. doi: 10.21608/jppp.2006.235163
Abd EI-Hadi,, A., EI-Sherbeny, G., EI-Magrabi, A. GENETIC BEHAVIOR FOR SOME IMPORTANT ECONOMICAL TRAITS AND THE NATURE OF RESISTANCE FOR POWDERY MILDEW IN SQUASH.. Journal of Plant Protection and Pathology, 2006; 31(1): 501-513. doi: 10.21608/jppp.2006.235163
GENETIC BEHAVIOR FOR SOME IMPORTANT ECONOMICAL TRAITS AND THE NATURE OF RESISTANCE FOR POWDERY MILDEW IN SQUASH.
1Dept. of Genetics Fac. of Agric. Mansoura Univ. Egypt
2Dept. of Agric. Botany (Genetics), Sohag Fac. of Agric., South Valley Univ. So hag, Egypt
3Plant Dis. Inst. Agric. Res. Center. Egypt.
Abstract
In this investigation six parental varieties of squash obtained form different sources were used. These varieties were : Eskandrani (P,). Giado (P2). Zucchino rnezza lung bianco (P3). Zucchino 544-005 (P4). White bush scallop (Ps) and Zucchino nano verda di Milano (Ps).These parental varieties were crossed among them to obtain 15 F, hybrids through diallel crosses mating design excluding reciprocals. All genotypes which included the six parental varieties and their 15 F, hybrids were evaluated. Different yield and yield component traits as well as the nature of
resistance for powdery mildew were studied. .
The results indicated the presence of highly significance differences among genotypes. This finding was expected. where the parental varieties were obtained from different sources. The results also revealed that no parental variety exceeded the other parents for mean performances for all studied traits. The parent P3 was the earliest and gave the highest yield. In the same time. the Ps and Ps were the highest for some traits.
The F, hybrid P3XPS was the earliest hybrid. while the F, hybrid P4XPS was the latest. PsxPs was the lowest hybrid for F.Y.lP. and No. F.lP. The highest F, hybrid was P2XP4 for No. F.lP. Psxf's showed the high level of resistance for powdery mildew.
Heterosis values were observed for most hybrids. The best heterosis (HMP%)values were: -19.72(P3 x Ps): -26.65(P, x P2): -9.55(P, x Pe): 111.43(P4 x Ps): 20.62(P4 x Pe): 76.05(P, x Ps): 20.63(P4 x Ps): 34.28(Ps x Ps) and 800.3(P, x Ps) for D.1S! F.F. No.1S! F.F.N .. 1S! P.D .. F.Y.lP kg .. WF/P.g .. NO.F.lP .. F.L.cm .. F.D.cm. and D.S .. estimated from the mid-parents. respectively.
The results also cleared that both additive and non-additive genetic variances including dominance could not be neglected in the inheritance of all studied traits of squash.
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