982 resultados para Abbott, Jim
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[Two men stand in heavy coats near a building]
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The nature and extent of reproductive isolation was examined between a new self-compatible hybrid species Senecio eboracensis (2n = 40) and its parents, self-incompatible S. squalidus (2n = 20) and self-compatible S. vulgaris (2n = 40). The triploid F-1 of S. eboracensis x S. squalidus exhibited very low seed set ((x) over bar = 0.63%), and F-2 and F-3 progeny were able to recover nominal levels of fertility ((x) over bar = 23.9 and 9.7%), while F-1 and F-2 offspring of S. eboracensis x S. vulgaris showed reduced seed set ((x) over bar = 63.8 and 58.8%). In both cases, evidence from previous work indicates that reduced fertility is associated with meiotic chromosome mispairing, and is a likely consequence of recombining both parental genomes within this new taxon. No hybrid offspring between S. eboracensis and S. squalidus were found in the wild, and only one such hybrid was recorded among 769 progeny produced by S. eboracensis surrounded by S. squalidus on an experimental plot. Natural crossing between S. eboracensis and S. vulgaris was recorded to be very low (between 0 and 1.46%) in the wild, but rose to 18.3% when individuals of S. eboracensis were surrounded by plants of S. vulgaris. It was concluded that strong breeding barriers exist between the new hybrid species and its two parents. Prezygotic isolation between S. eboracensis and S. vulgaris is likely to be largely due to both species reproducing by predominant self-fertilisation. However, differences recorded for germination, seedling survival, time of flowering and characters associated with pollinator attraction, plus significant clumping of juvenile and adult conspecifics in the wild, probably also contribute to reproductive isolation and ecological differentiation.
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The Coral Gables Museum hosts a panel discussion on the subject of the challenges and struggles faced by both African American and Jewish communities in South Florida. Panelists include Rabbi Solomon Schiff, former Executive Director of the Greater Miami Rabbinical Association Ms. Bea Hines, religion columnist for the Miami Herald Rev. Gregory Pope, Instructor in Religious Studies at Florida International University Dr. Oren Stier, Associate Professor and Director of Holocaust Studies at Florida Internationa University and moderator Dr Nathan Katz, Distinguished Professor and Director of Jewish Studies at Florida International University
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Reception for the Coral Gables Museum exhibit of "Beyond Swastika and Jim Crow" held at Florida International University on October 26,2014
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The Coral Gables Museum hosts a forum on the topic of the evolution of American thought on race. This discussion is in response to the museum's exhibition "Beyond Swastika and Jim Crow". Event held on October 19,2014 at the Coral Gables Museum.
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General note: Title and date provided by Bettye Lane.
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