SON-KILLER: A THIRD EXTRACHROMOSOMAL FACTOR AFFECTING THE SEX RATIO IN THE PARASITOID WASP, NASONIA (=MORMONIELLA) VITRIPENNIS | Zendy

Samuel W. Skinner | Zendy

Open Access

SON-KILLER: A THIRD EXTRACHROMOSOMAL FACTOR AFFECTING THE SEX RATIO IN THE PARASITOID WASP, NASONIA (=MORMONIELLA) VITRIPENNIS

Author(s) -

Samuel W. Skinner

Publication year - 1985

Publication title -

genetics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.792

H-Index - 246

eISSN - 1943-2631

pISSN - 0016-6731

DOI - 10.1093/genetics/109.4.745

Subject(s) - nasonia vitripennis , biology , sex ratio , parasitoid wasp , parasitoid , extrachromosomal dna , genetics , hymenoptera , zoology , host (biology) , pteromalidae , gene , population , genome , demography , sociology

An extrachromosomal factor, termed son-killer (sk), affects the sex ratio in a parasitoid wasp, Nasonia (=Mormoniella) vitripennis. The factor is maternally transmitted and alters the secondary sex ratio of an infected female through mortality of approximately 80% of the male embryos. No effect on the primary (zygotic) sex ratio is observed. Ninety-five percent of the daughters of an infected female inherit son-killer. The factor can also be transmitted contagiously when the progeny of infected and uninfected females develop simultaneously on a single host. In newly infected strains, the sex ratio effects are equivalent to those in the original.

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