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fruitless tunes functional flexibility of courtship circuitry during development.


ABSTRACT: Drosophila male courtship is controlled by the male-specific products of the fruitless (fruM) gene and its expressing neuronal circuitry. fruM is considered a master gene that controls all aspects of male courtship. By temporally and spatially manipulating fruM expression, we found that fruM is required during a critical developmental period for innate courtship toward females, while its function during adulthood is involved in inhibiting male-male courtship. By altering or eliminating fruM expression, we generated males that are innately heterosexual, homosexual, bisexual, or without innate courtship but could acquire such behavior in an experience-dependent manner. These findings show that fruM is not absolutely necessary for courtship but is critical during development to build a sex circuitry with reduced flexibility and enhanced efficiency, and provide a new view about how fruM tunes functional flexibility of a sex circuitry instead of switching on its function as conventionally viewed.

SUBMITTER: Chen J 

PROVIDER: S-EPMC7861613 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

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<i>fruitless</i> tunes functional flexibility of courtship circuitry during development.

Chen Jie J   Jin Sihui S   Chen Dandan D   Cao Jie J   Ji Xiaoxiao X   Peng Qionglin Q   Pan Yufeng Y  

eLife 20210119


Drosophila male courtship is controlled by the male-specific products of the <i>fruitless</i> (<i>fru<sup>M</sup></i>) gene and its expressing neuronal circuitry. <i>fru<sup>M</sup></i> is considered a master gene that controls all aspects of male courtship. By temporally and spatially manipulating <i>fru<sup>M</sup></i> expression, we found that <i>fru<sup>M</sup></i> is required during a critical developmental period for innate courtship toward females, while its function during adulthood is i  ...[more]

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