TABLE 1

Sex- and reproduction-related gene classification

Gene classificationDefinition
Sex- and reproduction-related (SRR) genesA broad classification that indicates genes linked, in a broad sense, to sex and/or reproduction. Genes that would fall under the SRR category are listed below.
Sex tissue expressed (STE)Genes that are expressed in male or female reproductive tissues; as listed below.
    Sex tissue sharedGenes that are expressed in both testis and ovary but not in head.
    Testis specificGenes that are expressed only in testis.
    Ovary specificGenes that are expressed only in ovary.
    Testis relatedGenes that are expressed in testis as well as in head.
    Ovary relatedGenes that are expressed in ovary as well as in head.
Seminal fluid proteinsGenes that are expressed in accessory glands and encoding seminal fluid proteins (SFPs) (includes proteins from ejaculatory bulb and ejaculatory duct also).
Female reproductive tractGenes that are expressed in the female reproductive tract (FRTP).
GametogenesisGenes that are expressed in and involved in the generation/development of male and/or female gemates.
Male reproductive genesA general classification of all genes with likely male-related function, including testis-specific, testis-related, sex-tissue-shared, SFP, and spermatogenesis genes.
Female reproductive genesA general classification of all genes with likely female-related functions including ovary-specific, ovary-related, sex-tissue-shared, FRTP, and oogenesis genes.
  • Not all the genes under these different categories are necessarily and directly involved in sex and reproduction but, due to their tissue of expression, may invariably influence the development and physiology of sex tissues and reproductive biology of the organism. Categorization is based on the expression patterns or functions of genes known in D. melanogaster. Very little is known about gene expression patterns in other Drosophila species and therefore at present we cannot rule out the possibility of change in expression pattern or function of some of these genes in other Drosophila species.