The mutational decay of male-male and hermaphrodite-hermaphrodite competitive fitness in the androdioecious nematode C. elegans
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چکیده
منابع مشابه
The mutational decay of male and hermaphrodite competitive fitness in the androdioecious
15 Androdioecious Caenorhabditis have a high frequency of self-compatible hermaphrodites and a 16 low frequency of males. The effects of mutations on male fitness are of interest for two reasons. 17 First, when males are rare, selection on male-specific mutations is less efficient than in 18 hermaphrodites. Second, males may present a larger mutational target than hermaphrodites 19 because of t...
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We have undertaken electron micrographic reconstruction of the Caenorhabditis elegans hermaphrodite uterus and determined the correspondence between cells defined by their lineage history and differentiated cell types. In this organ, many cells do not move during morphogenesis and the cell lineage may function to put cells where they are needed. Differentiated uterine cell types include the tor...
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xol-1 is the earliest-acting gene in the known hierarchy that controls C. elegans sex determination and dosage compensation. We show that the primary sex-determining signal (the X/A ratio) directs the choice of sexual fate by regulating xol-1 transcript levels: high xol-1 expression during gastrulation triggers male development, whereas low expression at that time permits hermaphrodite developm...
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The ancestry of the cells in the hermaphrodite and male gonadal somatic structures of C. elegans has been traced from the two gonadal somatic progenitor cells (Zl and 24) that are present in the newly hatched larvae of both sexes. The lineages of Zl and 24 are essentially invariant. In hermaphrodites, they give rise to a symmetrical group of structures consisting of 143 cells, and in males, the...
متن کامل2 . Hermaphrodite signals for male mating
Caenorhabditis elegans male mating provides an excellent opportunity to determine how sensory perception regulates behavior and motor programs. The male-specific nervous system and muscles are superimposed over the general nervous system and musculature. Genetic screens and genomic approaches have identified male-specific and male-enriched genes as well as non-sex specific molecules specialized...
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ژورنال
عنوان ژورنال: Heredity
سال: 2017
ISSN: 0018-067X,1365-2540
DOI: 10.1038/s41437-017-0003-8