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Self-fertility and associated flower head traits in the Iberian taxa ofLactuca and related genera (Asteraceae: Lactuceae)

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Abstract

Sexual reproduction is the main reproduction mechanism among the 14 wild Iberian taxa ofLactuca, Prenanthes, Cicerbita, andMycelis. High levels of self-fertilization occur inLactuca, as well as facultative and obligate xenogamy. Xenogamy is strongly correlated with large capitula having blue or bright yellow colouration, high P/O ratios, and long anthesis, whereas self-fertilization is correlated with smaller capitula having pale yellow colouration, small P/O ratios, and short anthesis. Large variations occur in P/O index among taxa showing similar fertilization mechanism, probably in relation to the number of florets included in flower heads. Interesting differences in reproductive systems have been detected between subspecies ofLactuca viminea.

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  1. Departamento de Biologia Vegetal y Ecologia, Universidad de Sevilla, Apartado de Correos 1095, E-41080, Sevilla, Spain

    José A. Mejías

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  1. José A. Mejías
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Mejías, J.A. Self-fertility and associated flower head traits in the Iberian taxa ofLactuca and related genera (Asteraceae: Lactuceae). Pl Syst Evol 191, 147–160 (1994). https://doi.org/10.1007/BF00984661

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  • DOI: https://doi.org/10.1007/BF00984661

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