Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 4 of 4 for “"host races"”.
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Reciprocal Transplant and Machine Learning Study of Oak Mistletoe on Three Host Oak Species in Santa Margarita, California
… species of mistletoe is specializing on certain host oak trees, but the mechanisms of this specialization are unknown. In order to investigate this pattern, we utilized a type of machine learning in GIS called supervised classification as well as a reciprocal transplant study in the field. The …
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Genetic differentiation of the parasitoid, Cotesia congregata (Say), based on host-plant complex
… have intimate relationships with their host species as well as the plant on which their host develops. Characteristics of both hosts and plants can affect parasitoid success in tri-trophic systems and thus, drive diversification. Genetic differentiation was estimated for Cotesia …
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Experimental and Population Genetic Evidence of Host Race Formation in a Specialized Lycaenid Butterfly
Host-associated differentiation in phytophagous insects is an important mechanism of speciation. The current study investigates whether adaptation to different hosts drives population genetic divergence in the juniper hairstreak butterfly, Mitoura gryneus. Mitoura exhibit host plant fidelity, in …
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ΓΕΝΕΤΙΚΗ ΜΕΛΕΤΗ ΠΛΗΘΥΣΜΩΝ ΤΟΥ ΕΝΤΟΜΟΥ CERATITIS CAPITATA (WIEDEMANN) (DIPTERA: TEPHRITIDAE)
… GEOGRAPHICAL AREAS AND ALSO FROM DIFFERENT HOST FRUIT SPECIES ARE STUDIED ELECTROPHORETICALLY. THE RESULTS ARE SUMMARIZED AS FOLLOWS. 1) ALL THE MEDITERRANEAN POPULATIONS PROVED TO BE HIGHLY MONUMORPHIC (H=0.051), WHEREAS THOSE FROM SOUTH AFRICA, KENYA AND REUNIUS WERE POLYMORPHIC (H=0.234, …