Predicting patterns of mating and potential hybridization from pollinator behavior

The American Naturalist
Diane R CampbellGregory T Pederson

Abstract

Hybridization in flowering plants is determined in part by the rate at which animal pollinators move between species and by the effectiveness of such movements in transferring pollen. Pollinator behavior can also influence hybrid fitness by determining receipt and export of pollen. We incorporated information on pollinator effectiveness and visitation behavior into a simulation model that predicts pollen transfer between Ipomopsis aggregata, Ipomopsis tenuituba, and hybrids. These predictions were compared with estimates of pollen transfer derived from movement of fluorescent dyes in experimental plant arrays. Interspecific pollen transfer was relatively uncommon in these arrays, whereas transfer between hybrids and the parental species was at least as common as conspecific transfer. Backcrossing was asymmetrical; I. aggregata flowers frequently received mixed loads of hybrid and conspecific pollen. The simulation suggests that these patterns of pollen transfer are largely explained by the visitation sequences of hummingbird and insect pollinators, with little contribution from mechanical isolation. Pollen receipt by hybrids exceeded that of both parental species in a year when pollinators preferred to visit F(1) and F(2) hybri...Continue Reading

References

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Citations

Apr 23, 2010·BMC Evolutionary Biology·Nicolas J VereeckenFlorian P Schiestl
Dec 21, 2013·Annals of Botany·Mascha BischoffDiane R Campbell
Jun 25, 2014·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Richard J Abbott, Adrian C Brennan
Oct 15, 2005·The American Naturalist·Jennifer M Rhode, Mitchell B Cruzan
Jan 26, 2007·The American Naturalist·Diane R Campbell, Nickolas M Waser
Feb 9, 2005·Evolution; International Journal of Organic Evolution·Anthony IppolitoTimothy P Holtsford
Jul 22, 2008·Evolution; International Journal of Organic Evolution·Diane R CampbellCarrie A Wu
Jan 15, 2014·Journal of Evolutionary Biology·S G WellerR E Danielson
Feb 24, 2012·American Journal of Botany·Teresa M StoeplerMark Fishbein
Jul 2, 2003·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Andrew G StephensonJames A Winsor
Nov 26, 2003·Journal of Evolutionary Biology·D R CampbellC A Wu
May 19, 2021·Integrative Zoology·Leidy Azucena Ramírez-FráncelGiovany Guevara

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