Sources of Resistance to Whitefly (Bemisia spp.) in Wild Populations of Solanum lycopersicum var. Cerasiforme (Dunal) Spooner G.J. Anderson et R.K. Jansen in Northwestern Mexico |
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Authors: | Pedro Sánchez-Peña Ken Oyama Juan Núñez-Farfán Juan Fornoni Sergio Hernández-Verdugo Judith Márquez-Guzmán José Antonio Garzón-Tiznado |
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Institution: | (1) Maestría en Ciencias de la Producción, Facultad de Agronomía, Universidad Autónoma de Sinaloa, Carretera Culiacán-El Dorado Km 17.5, Apdo. Postal 726, CP 80000 Culiacán, Sinaloa, México;(2) Centro de Investigaciones en Ecosistemas, Universidad Nacional Autónoma de México, Campus Morelia, Michoacán, México;(3) Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Apdo. Post. 70-275, C.P. 04510 México Distrito Federal, México;(4) Facultad de Ciencias, Universidad Nacional Autónoma de México, Distrito Federal, México;(5) INIFAP-CIRNO, Unidad de Biotecnología del CIRNO, Campo Experimental del Valle de Culiacán, Km 16.5 Carretera Culiacán-El Dorado, Culiacán, Sinaloa, México |
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Abstract: | Genetic variability of wild populations, closely related to domesticated species, constitute important genetic resources for
plant breeding programs. In this paper, we analysed the variation of eight wild populations of Solanum lycopersicum var. cerasiforme in a common garden experiment for levels of plant infestation by whitefly, leaf trichome density as a defensive character
preventing infestation by whitefly, and the effect of whitefly incidence into vegetative and reproductive plant characters.
Number of adults of whitefly was recorded in the eight wild populations of S. lycopersicum var. cerasiforme, one population of the wild species S. habrochaites (C-360), and one of a cultivated variety of S. lycopersicum (Rio Grande). There were significant differences among the wild populations of S. lycopersicum var. cerasiforme in the average level of whitefly incidence and trichome density. Cultivated tomatoes had the higher incidence of whiteflies
(
= 7.50 ± 0.14) followed by plants of S. lycopersicum var. cerasiforme (
= 2.02 ± 0.92) and plants of S. habrochaites with the lowest incidence (
= 0.36 ± 0.35). Whitefly incidence was negatively correlated with trichome density (r = − 0.38, p < 0.0001), suggesting that trichomes deter or limit the establishment of whiteflies. Additionally, a significant negative
effect of whitefly incidence along the growing season upon plant growth rate (number of branches and height) and fruit production
was detected. |
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Keywords: | Bemisia spp Leaf trichomes Lycopersicum Resistance Solanum Whitefly incidence Wild tomato |
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