Rates of cross-pollination inLycopersicon pimpinellifolium: Impact of genetic variation in floral characters |
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| Authors: | Charles M. Rick Miguel Holle Robbin W. Thorp |
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| Affiliation: | (1) Department of Vegetable Crops, University of California, 95616 Davis, CA, USA;(2) Departamento de Suelos y Cultivos, Centro Agronomico Tropical de Investigación y Ensenañza, Turrialba, Costa Rica;(3) Department of Entomology, University of California, 95616 Davis, CA, USA |
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| Abstract: | Cross-pollination was tested between different genotypes ofLycopersicon pimpinellifolium in an experimental plot situated in the southerly range of the species. Rates of cross-pollination were found to be highly correlated with flower size and were related to a lesser extent with degree of stigma exsertion. Comparisons of fertility suggest that exsertion of 1.5 mm or more from the anther tube orifice interferes with automatic self-pollination, thereby increasing rates of cross-pollination. A single species ofExomalopsis (Anthophoridae), observed to visit all tested genotypes ofL. pimpinellifolium, was responsible for most of the pollination. Other species of solitary bees and other bee families participated in cross-pollination. |
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| Keywords: | Solanaceae Lycopersicon pimpinellifolium Hymenoptera Exomalopsis Rates of cross-pollination floral attractivity stigma position evolution of floral parameters |
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