Morphological and molecular characterization of watermelon [Citrullus lanatus (Thunb.) Matsum and Nakai] genetic resources

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dc.contributor.advisorRajinder Singh
dc.contributor.authorDilbag Singh
dc.date.accessioned2017-06-14T09:02:59Z
dc.date.available2017-06-14T09:02:59Z
dc.date.issued2016
dc.description.abstractThe study entitled “Morphological and molecular characterization of watermelon [Citrullus lanatus (Thunb.) Matsum and Nakai] genetic resources” was carried out at the Department of Vegetable Science, Punjab Agricultural University, Ludhiana (India). The analysis of variance for twenty three metric traits showed significant differences. The value of phenotypic coefficient of variation was higher than genotypic coefficient of variation for all the morphological characters. High heritability along with high genetic advance were observed for yield and its contributing traits. Clustering analysis using D2 test grouped the eighty eight watermelon accessions into ten distinct clusters. Based on cluster means, Cluster III was best for earliness and lowest 100 seed weight, Cluster VII was best for fruit length and yield per plant, whereas, Cluster V out scored for fruit quality parameters. Thirty three polymorphic SSR markers assigned the germplasm into seven groups. Groups III, V and VII exclusively consisted of Indian landraces. Modern cultivars rich in fruit quality occupied Group IV. Indian landraces showed closeness to both cultivated and wild watermelons, partially explaining their intermediate genetic constitution. Six accessions viz. WM-5, IC315321, Thar Manik (all from India), EC-829827 (USA), EC-829866 (Pakistan) and EC829818 (Iran) were found to be resistant to Cucumber mosaic virus. Combining the strengths of indigenous and exotic watermelon genotypes would be ideal to achieve twin objectives of broadening the genetic base as well as crop improvement of watermelon.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810020107
dc.keywordsCitrullus lanatus. CMV, D2 analysis, landraces, SSR markers, watermelon, Citrullus lanatusen_US
dc.language.isoenen_US
dc.pages107en_US
dc.publisherPunjab Agricultural University, Ludhianaen_US
dc.research.problemMorphological and molecular characterization of watermelon [Citrullus lanatus (Thunb.) Matsum and Nakai] genetic resourcesen_US
dc.subVegetable Scienceen_US
dc.subjectnullen_US
dc.thememolecular characterization of watermelonen_US
dc.these.typePh.Den_US
dc.titleMorphological and molecular characterization of watermelon [Citrullus lanatus (Thunb.) Matsum and Nakai] genetic resourcesen_US
dc.typeThesisen_US
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