Pepper morphological traits related with resistance to Phytophthora capsici
2008
Egea-Gilabert, C.,Universidad Politecnica de Cartagena (Spain). Ciencia Tecnologia Agraria | Bilotti, G.,Universidad de Murcia (Spain). Facultad de Biologia | Requena, M.E.,Universidad de Murcia (Spain). Facultad de Biologia | Ezziyyani, M.,Universidad de Murcia (Spain). Facultad de Biologia | Vivo-Molina, J.M.,Universidad de Murcia (Spain). Facultad de Economia y Empresa | Candela, M.E.,Universidad de Murcia (Spain). Facultad de Biologia
Inheritance of 10 morphological and quantitative traits related to plant and fruit development and resistance to the pathogen Phytophthora capsici was studied in an intraspecific cross between a non-pungent, susceptible Capsicum annuum parent (cv. Americano) and a wild, pungent and resistant line (Serrano Criollo de Morelos-334). Data were obtained from the segregation of 166 F2 plants and 50 F3 plants in four years. Three of the traits analyzed (necrosis length, leaf width and leaf length) exhibited a transgressive segregation. A multiple linear regression analysis was applied in order to establish a relationship between necrosis length and some of the morphological traits measured such as length and width of leaf, length, diameter and mass of fruit, capsaicin content in fruits, and presence of hair on leaves and stems. The results identified a linear dependence between necrosis length (as an inverse measurement of resistance) and leaf width, fruit diameter and hair presence in the stem. Pungency was not related with resistance.
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