The Impact of a Flower-Color Polymorphism on Mating Patterns in Experimental Populations of Wild Radish (Raphanus raphanistrum L.)

Stanton, Maureen L.; Snow, Allison A.; Handel, Steven N.; Bereczky, Judith

doi:10.2307/2409211

Cited by 78 publications

(45 citation statements)

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“…It is therefore possible that selection on floral morphology was stronger through male function than female function in this study of Raphanus. This is in agreement with earlier results for flower color in this species (Stanton et al 1986(Stanton et al , 1989.…”

Section: Selection In Raphanus Raphanistrumsupporting

confidence: 94%

Using Genetic Markers to Directly Estimate Male Selection Gradients

Morgan¹,

Conner²

2001

Evolution

103

124

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Abstract. We present an analysis of Raphanus raphanistrum and simulations illustrating the utility of directly estimating male phenotypic selection gradients using genetic markers. The method offers a much more refined characterization of selection than attempting to assign paternity to individual progeny. Our analysis of R. raphanistrum reveals selection on remarkably fine features of floral morphology, including anther exsertion, that were opaque to previous approaches. The new results also undermine a previous conclusion that selection on wild radish floral morphology acts primarily through female fitness. Simulation results show that selection gradients on the order of ␤ ϭ 0.1-0.2 can be readily detected with allozyme markers in moderate-sized (Ͻ 200 paternal individuals) populations. Highly polymorphic (e.g., microsatellite) markers will likely detect fine scale selection (␤ Ͻ 0.1) in larger populations (Ն 400 individuals). Increased progeny sample size, by sampling either additional maternal families or more progeny per maternal parent, partly compensates for low exclusion probability. Increasing the number of possible fathers without changing progeny sample size decreases the ability to detect selection, especially at lower exclusion probabilities. Sampling only some male genotypes reduces the power to detect selection and biases (underestimates) the magnitude of the selection gradient estimate.

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Section: Selection In Raphanus Raphanistrumsupporting

confidence: 94%

Using Genetic Markers to Directly Estimate Male Selection Gradients

Morgan¹,

Conner²

2001

Evolution

103

124

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“…Flower colour in R. raphanistrum is controlled by a single gene, with white being completely dominant to yellow (Stanton et al 1989). This is consistent with the observation by Yamagishi and Terachi (1997) and Lee and Snow (1998) that crop R. sativus × wild R. raphanistrum hybrids (white versus yellow-flowered, respectively), always had white or pale pink flowers.…”

Section: Description and Account Of Variationsupporting

confidence: 89%

The biology of Canadian weeds. 132. Raphanus raphanistrum L.

Warwick¹,

Francis²

2005

Can. J. Plant Sci.

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Warwick, S. I. and Francis, A. 2005. The biology of Canadian weeds. 132. Raphanus raphanistrum. Can. J. Plant Sci. 85: . A review of biological information is provided for Raphanus raphanistrum L. Native to the Mediterranean region, the species is widely introduced and naturalized in temperate regions around the world. In Canada, it currently occurs in all provinces except Saskatchewan and Manitoba, has only a limited distribution in Alberta, and is also absent from the Yukon, the Northwest Territories and Nunavut. It is most abundant in the Atlantic and Pacific regions and is an important weed of field crops in the Maritime provinces and Quebec. A persistent seed bank, competitive annual growth habit and high fecundity all contribute to its weedy nature and ensure that it will be a continuing problem. It can easily hybridize with cultivated radish, R. sativus L., and commonly does so when they occur together. Limited hybridization with canola, Brassica napus L., has been reported from several experimental field and greenhouse trials. Selective herbicide control is most difficult in canola and other cruciferous crops. It is the most important dicot weed in the southwestern region of Australia, primarily due to the evolution of several different herbicide-resistant biotypes. These include biotypes resistant to the acetolactate synthase (ALS)-inhibitors (group 2 herbicides) and/or photosystem II-inhibitors (group 5), and a biotype with multiple resistance to ALS-inhibitors, photosystem II-inhibitors, an auxin (2,4-D amine), and a phytoene desaturase (PSDS)-inhibitor (diflufenican). A biotype resistant to the ALS-inhibiting herbicide chlorsulfuron has also been detected in South Africa. Un réservoir de semences bien stocké, une croissance agressive pour une annuelle et une grande fécondité expliquent la nature problématique de l'espèce, qui le demeurera longtemps. La plante se croise facilement avec le radis cultivé R. sativus et le fait couramment aux endroits où les deux espèces se côtoient. On a aussi rapporté une hybridation partielle avec le canola, Brassica napus L., lors de quelques essais sur des parcelles expérimentales ou en serre. La lutte au moyen de désherbants sélectifs s'avère particulièrement délicate dans les champs de canola et d'autres crucifères. Il s'agit de la principale dicotylédone nuisible dans le sud-ouest de l'Australie, principalement en raison de l'apparition de biotypes résistants. Ces biotypes résistent notamment aux inhibiteurs de l'acétolactate-synthase (herbicides du groupe 2) ou du photosystème II (groupe 5) ou aux deux. On a aussi identifié un biotype résistant aux deux types d'inhibiteurs précités ainsi qu'à l'auxine (2,4-D amine) et à l'inhibiteur de la phytoène désaturase. Enfin, on a repéré un biotype résistant au chlorsulfuron (inhibiteur de l'acétolactate-synthase) en Afrique du Sud.

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“…(12,46). Another is the differential attractiveness to pollinators and differential pollination success of different flower color morphs in hermaphroditic wild radishes (Raphanus raphanistrum) (47).…”

Section: The Empirical Situation In Plantsmentioning

confidence: 99%