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EVOSPERM

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Sexual selection and the evolutionary biology of spermatogenesis

Spermatogenesis is of fundamental importance to reproduction and fertility, yet several of its features remain enigmatic. Why, for example, do sperm display such extraordinary morphological diversity, when their basic function dif... ver más

31/03/2012

UNIVERSITAT BASEL

181K€

Presupuesto del proyecto: 181K€

Líder del proyecto

UNIVERSITAT BASEL No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo FP7 notifico la concesión del proyecto el día 2012-03-31 No tenemos la información de la convocatoria

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UNIVERSITAT BASEL

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Líder del proyecto

UNIVERSITAT BASEL No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 181K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Spermatogenesis is of fundamental importance to reproduction and fertility, yet several of its features remain enigmatic. Why, for example, do sperm display such extraordinary morphological diversity, when their basic function differs little from one species to another? And why are sperm produced in such large quantities, vastly exceeding the number of eggs produced by females? Sexual selection, the evolutionary force proposed by Charles Darwin 150 years ago, provides the most promising framework to answer these questions. We now recognize sexual selection can modify traits such as sperm morphology and sperm numbers whenever these enhance male fertilization success in competition with other males. However, there remain significant barriers to our understanding of how these traits evolve, because we know very little about either their genetic architecture or about how selection on sperm morphology or sperm numbers impacts on the machinery of spermatogenesis. To transform our understanding in these areas, we will use the highly amenable Macrostomum flatworms as a model to understand sperm evolution. First, we will conduct a quantitative genetic analysis in M. lignano of sperm morphology and numbers, plus a broad suite of additional male and female traits that are likely to affect sperm evolution. We will assess (a) genetic variation in and correlations between these traits and (b) the genetics of phenotypic plasticity in each trait. Second, we will apply immunocytochemical techniques to explore variation in the kinetics of spermatogenesis over both ecological and evolutionary timescales. We will test for (a) phenotypic plasticity; (b) genetic variation between inbred lines; and (c) divergence between related Macrostomum species with radically different sperm production requirements. Establishing how sexual selection shapes the complex machinery and products of spermatogenesis will provide widely applicable insights into the evolutionary biology of reproduction.

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