Some dioecious plants determine sex by sex chromosomes (XY or ZW) like mammals or birds. A pair of birds on branches of a pine tree, which is a symbol of a new year in Japan, is a couple of Eclectus parrots (Eclectus roratus) having extreme sexual dimorphism (left: ZZ male; right: ZW female). What they hold in their beaks are

Abstract

Genes to CellsVolume 20, Issue 1 p. i-i Cover ImageFree Access Some dioecious plants determine sex by sex chromosomes (XY or ZW) like mammals or birds. A pair of birds on branches of a pine tree, which is a symbol of a new year in Japan, is a couple of Eclectus parrots (Eclectus roratus) having extreme sexual dimorphism (left: ZZ male; right: ZW female). What they hold in their beaks are flowers of ‘Suiba’ (common sorrel or Rumex acetosa; left: XY1Y2 male; right: XX female). Suiba is one of the first species among the seed plants whose existence of sex chromosomes was reported (H. Kimura & T. Ono (1923) Bot. Mag. (Tokyo) 37(438), 147–149. DOI: 10.15281/jplantres1887.37.438_147). It is known that Suiba's sex determination system is similar to that of Drosophila and depends on the ratio of X chromosomes to autosomes. Designed by TRAIS Co., Ltd. (Kobe, Japan) First published: 06 January 2015 https://doi.org/10.1111/gtc.12213AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume20, Issue1January 2015Pages i-i RelatedInformation