Forouzandeh Soltani; Moien Shajari; Giti Sadat Mirbehbahani; Mohammad Reza Bihamta
Abstract
Understanding genetic diversity and germplasm classification are the keys for selection of right parents for breeding purposes. In the present study, the genetic diversity and classification of 45 Iranian and 15 foreign melons were evaluated. A greenhouse experiment was laid out as a randomized completely ...
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Understanding genetic diversity and germplasm classification are the keys for selection of right parents for breeding purposes. In the present study, the genetic diversity and classification of 45 Iranian and 15 foreign melons were evaluated. A greenhouse experiment was laid out as a randomized completely block design with three replications and five plants in each replicates. Fruit number had a positive correlation with female flower numbers, fruit number, and fruit yield. The fruit number, however, correlated negatively with the leaf area. Genotypes with monoicous flowering habit produced female flowers in lower nodes and formed longer fruit. The number of the female flower, fruit number, yield, high total soluble solids (TSS), leaf area, the first node of female appearance, and flesh firmness were amongst the high weighted and more coefficient in the component analysis. For the breeding purpose, all accessions of cluster 4 were andromonoecious and obtained high TSS, leaf area, and flesh firmness. From the first three clusters, 11 accessions were monoecious, which belonged to TN-93-5, TN 92100, TN 921071, TN 922025 (Cluster1), FLTM 27, and FLTM35 (Cluster2), TN921026, TN-94-21, TN- 94-44, TN-94-28, and TN-94-3 (Cluster3). The characteristic of cluster 3 included melons with high female flower and fruit number and fewer number of the first node of female flower. In conclusion, good genetic resources and foreign types for selection are available for improving the breeding of melons based on the evaluated traits.
Majid Esmaeili; Forouzandeh Soltani; Mohammad Reza Bihamta; Mohammad Javan Nikkhah
Abstract
The purpose of this study was to estimate heritability, general and specific combining ability and the relationship between traits. Investigated traits were fruit number per plant, total yield per plant, average fruit weight, flesh thickness, flesh firmness, seed cavity size, total soluble solid, fruit ...
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The purpose of this study was to estimate heritability, general and specific combining ability and the relationship between traits. Investigated traits were fruit number per plant, total yield per plant, average fruit weight, flesh thickness, flesh firmness, seed cavity size, total soluble solid, fruit length in melon. A complete diallel design was conducted for this purpose five parental genotypes were crossed and the hybrids were evaluated in a randomized complete block design with three replications. Analysis of variance of traits showed a significant differences between hybrids, therefore the first Griffing method was used to analyze the combining ability. The general combining ability effects were significant for all parents in the evaluated traits. The specific combining ability of yield per plant was higher than the general combining ability, which indicates the dominance and non-additive actions of genes. High narrow-sense heritability for yield per plant, flesh firmness and the number of fruit per plant (0.86, 0.72 and 0.70, respectively) indicated low environmental effect for these traits and the greater role of additive effects. The highest narrow-sense heritability was estimated for yield per plant (0.86). The role of non-additive effects of genes in controlling yield and flesh firmness traits was greater than additive effects. Therefore, the preparation of superior hybrids using breeding methods based on progeny tests will be effective in improving the mentioned traits in melon.
Mohsen Hatami; Siamak Kalantari; Forouzande Soltani
Abstract
Six Iranian accessions of Cucumis melo, including Inodorus, Cantalupensis, and Dudaim groups, were planted and then harvested at two harvesting stages including 21 and 28 days after anthesis for Dudaim group and 28 and 38 days after anthesis for Inodorus and Cantalupensis groups. At the time of harvest, ...
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Six Iranian accessions of Cucumis melo, including Inodorus, Cantalupensis, and Dudaim groups, were planted and then harvested at two harvesting stages including 21 and 28 days after anthesis for Dudaim group and 28 and 38 days after anthesis for Inodorus and Cantalupensis groups. At the time of harvest, we measured some quality parameters and appearance indices of fruits, such as the number of strips on surface, tendril condition, peduncle condition, presence or absence of the abscission zone formed around the peduncle, netting, presence of trichomes, and force needed to detach the fruit from the plant. Results showed that the best ripening indices for Inodorus, Cantalupensis, and Dudaim groups were not the same. Contrary to Samsouri and lately harvested Khatouni accessions, there were not any abscission zone in Dudaim fruits. In most of the treatments, tendril was yellow or dry in lately harvested fruits opposite to green in tendrils in early harvested fruits. Peduncles were green in all treatments and the force needed to detach the fruit from the plant in most treatments was the highest degree (score 3). Lately harvested fruits had more advanced levels of color, TSS, and firmness than early harvested ones. Generally, the best ripening indices for melon fruits corresponding to each accession were different.