Performance and nature of genetic divergence of cucumis meld genotypes and their F1 hybrids in relation to polygenic variation and isozyme polymorphism [electronic resource].
الأداء و طبيعة التباعد الوراثي بين التراكيب الوراثية في كيوكيمس ميلو و هجن الجيل الاول و علاقتها بالاختلافات عديدة الجينات و التعدد المظهرى للمشابهات الانزيمية.
- p.2659-2679.
Includes references.
Six Cucumis melo L. genotypes included two plant introductions of the North Central Regional Plant Introduction Station, Iowa State University, two Commercial American varieties and two Egyptian local varieties were used to carry out this study in the Experimental Farm and the Biotechnology Lab., El-Kassasein Horticulture Research Station during the seasons of 2001 and 2002. The genetic divergence among the six Co melo genotypes and their F1 hybrids based on the genetic distances revealed five clusters. The clusering pattern indicated that there was no relationship between the parental divergence and their hybrid performance. The local variety; Ismaillawi, constituted a single cluster and having divergent distance from the other genotypes. The association analysis revealed that plant height had significant and positive correlation coefficients either phenotypic and genotypic with plant growth rate, average fruit weight, fruit length and fruit. width. Also, plant growth rate showed positive significant correlation with each of average fruit weight, fruit length and fruit width. Selection for elevated levels of these characters is likely to increase the average fruit weight and fruit yield. Variation in isozyme banding patterns for parental genotypes and their nine Fl hybrids showed that the genetic distances among parental genotypes were higher in both magnitude and range than those observed among their F1 hybrids indicating that each of these nine F1 hybrids.