Davidar P. auteur aut IRD Snow A. A. auteur aut IRD Rajkumar M. auteur aut IRD Pasquet Rémy auteur aut IRD Daunay M. C. auteur aut IRD Mutegi E. auteur aut IRD text journalArticle eng text/pdf born digital access Premise of the study: In India and elsewhere, transgenic Bt eggplant (Solanum melongena) has been developed to reduce insect herbivore damage, but published studies of the potential for pollen-mediated, crop-to-wild gene flow are scant. This information is useful for risk assessments as well as in situ conservation strategies for wild germplasm. Methods: In 2010-2014, we surveyed 23 populations of wild/weedy eggplant (Solanum insanum; known as wild brinjal), carried out hand-pollination experiments, and observed pollinators to assess the potential for crop-to-wild gene flow in southern India. Key results: Wild brinjal is a spiny, low-growing perennial commonly found in disturbed sites such as roadsides, wastelands, and sparsely vegetated areas near villages and agricultural fields. Fourteen of the 23 wild populations in our study occurred within 0.5 km of cultivated brinjal and at least nine flowered in synchrony with the crop. Hand crosses between wild and cultivated brinjal resulted in seed set and viable F-1 progeny. Wild brinjal flowers that were bagged to exclude pollinators did not set fruit, and fruit set from manual self-pollination was low. The exserted stigmas of wild brinjal are likely to promote outcrossing. The most effective pollinators appeared to be bees (Amegilla, Xylocopa, Nomia, and Heterotrigona spp.), which also were observed foraging for pollen on crop brinjal. Conclusion: Our findings suggest that hybridization is possible between cultivated and wild brinjal in southern India. Thus, as part of the risk assessment process, we assume that transgenes from the crop could spread to wild brinjal populations that occur nearby. specialized brinjal crop-wild hybridization flowering times genetic resources India pollinator observations seed set Solanum insanum transgenic wild eggplant wild germplasm INDE SUD 076 102 1 129-139 2015 0002-9122 https://www.documentation.ird.fr/hor/fdi:010063681 10.3732/ajb.1400404 0002-9122 [F B010063681] https://www.documentation.ird.fr/hor/fdi:010063681 https://www.documentation.ird.fr/intranet/publi/2015/02/010063681.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2015-03-03 2017-08-23 fdi:010063681 fre