Social chromosome variants differentially affect queen determination and the survival of workers in the fire ant Solenopsis invicta.

Intraspecific variation in social organization is common, yet the underlying causes are rarely known. An exception is the fire ant Solenopsis invicta in which the existence of two distinct forms of social colony organization is under the control of the two variants of a pair of social chromosomes, SB and Sb. Colonies containing exclusively SB/SB workers accept only one single queen and she must be SB/SB. By contrast, when colonies contain more than 10% of SB/Sb workers, they accept several queens but only SB/Sb queens. The variants of the social chromosome are associated with several additional important phenotypic differences, including the size, fecundity and dispersal strategies of queens, aggressiveness of workers, and sperm count in males. However, little is known about whether social chromosome variants affect fitness in other life stages. Here, we perform experiments to determine whether differential selection occurs during development and in adult workers. We find evidence that the Sb variant of the social chromosome increases the likelihood of female brood to develop into queens and that adult SB/Sb workers, the workers that cull SB/SB queens, are overrepresented in comparison to SB/SB workers. This demonstrates that supergenes such as the social chromosome can have complex effects on phenotypes at various stages of development.

Annual report of the Commissioners for the Queen Victoria Niagara Falls Park of the Province of Ontario, 1887.

Description based on: 16th ed. (1901).

Annual report of the Commissioners for the Queen Victoria Niagara Falls Park of the Province of Ontario, 1888.

Description based on: 16th ed. (1901).

Annual report of the Commissioners for the Queen Victoria Niagara Falls Park of the Province of Ontario, 1889.

Description based on: 16th ed. (1901).

Annual report of the Commissioners for the Queen Victoria Niagara Falls Park of the Province of Ontario.

Description based on: 16th ed. (1901).

Annual report of the Commissioners for the Queen Victoria Niagara Falls Park of the Province of Ontario, 1892.

Description based on: 16th ed. (1901).

Annual report of the Commissioners for the Queen Victoria Niagara Falls Park of the Province of Ontario, 1893.

Description based on: 16th ed. (1901).

Annual report of the Commissioners for the Queen Victoria Niagara Falls Park of the Province of Ontario, 1894.

Description based on: 16th ed. (1901).

Invitation: Gala Concert in honour of Her Majesty Queen Elizabeth and His Royal Highness the Duke of Edinburgh

An invitation from The Right Honourable Pierre Elliott Trudeau for a gala concert in the Opera of the National Arts Centre in honour of Her Majesty Queen Elizabeth and His Royal Highness the Duke of Edinburgh.

Ticket for The Coronation of Her Majesty Queen Elizabeth II

A ticket to attend the Coronation of Queen Elizabeth II on 2 June 1953. The ticket is for Mrs. Arthur Schmon for seat no. C29.

Indenture of Conveyance between Her Majesty the Queen and Joseph A. Woodruff

Indenture of conveyance between Her Majesty the Queen and Joseph A. Woodruff of St. Catharines regarding 100 acres more or less in part of Lot no. 5 in the 2nd Concession in the 34 Township of Lobo in the County of Middlesex. This was registered in the County of Middlesex Register on Oct. 20, 1873. This is a duplicate of the original executed on Oct. 15, 1875.

Queen Hortens : a lite picture of the Napoleonic era

UANL

Westward Hol : or the voyages and adventures of six amyas leight knight of burrough, in the country of de von in the reign of her most gorius majestry queen Elizabeth

UANL