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International Journal of Vegetable Science
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Evaluation of Genetic Relationships Among Melon
Genotypes Based on Morphological Markers
Somayeh Bagheriyan a , Hamid Reza Karimi a & Majied Esmaelizadeh a a Department of Horticultural Science, College of Agriculture , Vali-e-Asr University of
Rafsanjan , Rafsanjan , Iran
Accepted author version posted online: 18 Jul 2013.
To cite this article: Somayeh Bagheriyan , Hamid Reza Karimi & Majied Esmaelizadeh (2013): Evaluation of Genetic
Relationships Among Melon Genotypes Based on Morphological Markers, International Journal of Vegetable Science, DOI: 10.1080/19315260.2013.818608
To link to this article: http://dx.doi.org/10.1080/19315260.2013.818608
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ACCEPTED MANUSCRIPT 1
Evaluation of Genetic Relationships Among Melon Genotypes
Based on Morphological Markers
Somayeh Bagheriyan, Hamid Reza Karimi and Majied Esmaelizadeh
Department of Horticultural Science, College of Agriculture, Vali-e-Asr University of Rafsanjan,
Address correspondence to H.R. Karimi at the above address. Email:firstname.lastname@example.org
Selection of suitable genotypes resistant to unfavorable environmental and soil conditions and diseases are important to increase yield of melon (Cucumis melo L.). The study was undertaken to evaluate melon genotypes and to examine phylogenetic relationships between genotypes.
Nineteen melon types from Iran and Afghanistan were used. Thirty-five morphologic characteristics were evaluated based on the melon International Plant Genetic Resources Institute descriptors. Flesh thickness, fruit length, fruit diameter and cavity length were positively correlated with fruit weight. Factor analysis was used to determine effective characteristics and numbers of main factors. For each factor a loading of ≥0.65 was considered significant. Effective characteristics were categorized into 9 main factors that contributed to 92.44% of overall variance. Fruit length, fruit ratio (L/W), cavity length, cavity ratio (L/W), flesh hardiness, soluble solids content, placenta color and secondary skin color pattern were defined mainly by the first factor contributing 26.37% of total variance. Melon genotypes were clustered based on 9 factors and at a similarity distance of 20 and further divided into 6 groups. Group Cantalupensis and
Inodorus genotypes were not separated. There was a high diversity in genotypes which could be used in breeding.
Keywords: Cucumis melo, accession, Cantalupensis, , cluster analysis, Inodorus
Melon (Cucumis melo L.) grows in tropical, subtropical and temperate climates (Pech et al., 2007). Iran, Afghanistan, India and China are areas of melon diversification and wild ancestors of melon seem to have been native to the region from Egypt to Iran and northwest India. Melon varies widely in leaf, vine, plant habit, and fruit characters, and the morphological diversity allowed Naudin (1859) to subdivide species into 10 groups, and then Munger and Robinson (1991) further reclassified the species into the groups: Agrestis (wild melon), Flexuosus (snake melon), Conomon (pickling melon), Cantalupensis (cantaloupe or muskmelon), Inodorus (winter melon, honeydew, casaba), Chito (mango melon), Dudaim (queen’s pocket melon), and
Momordica (phoot or snap-melon). Morphological markers have been used to study genetic relationship of melons (Escribano et al., 2009; Szamosi et al., 2009; Nastari Nasrabadi et al., 2012). According to Fujishita (1983) and Akashi et al. (2002), seed length is highly variable among melon varieties, and melon groups can be classified into large-seed types (seed length ≥9.0 mm) and small-seed types (seed length <9.0 mm). Morphological and molecular markers have been used to define genetic relationships among botanical groups and commercial market classes (Garcia et al., 1998; Stepansky et al., 1999; Mliki et al., 2001; Staub et al., 2004; Dhillon