Life Sciences Commons^™

Apospory And Diplospory In Diploid Boechera (Brassicaceae) May Facilitate Speciation By Recombination-Driven Apomixis-To-Sex Reversals, John G. Carman, Mayelyn Mateo De Arias, Lei Gao, Xinghua Zhao, Becky M. Kowallis, David A. Sherwood, Manoj K. Srivastava, Krishna K. Dwivedi, Bo J. Price, Landon Watts, Michael D. Windham

Plants, Soils, and Climate Faculty Publications

Apomixis (asexual seed formation) in angiosperms occurs either sporophytically, through adventitious embryony, or gametophytically, where an unreduced female gametophyte (embryo sac) forms and produces an unreduced egg that develops into an embryo parthenogenetically. Multiple types of gametophytic apomixis occur, and these are differentiated based on where and when the unreduced gametophyte forms, a process referred to as apomeiosis. Apomeiotic gametophytes form directly from ameiotic megasporocytes, as in Antennaria-type diplospory, from unreduced spores derived from 1st division meiotic restitutions, as in Taraxacum-type diplospory, or from cells of the ovule wall, as in Hieracium-type apospory. Multiple types of apomeiosis occasionally occur in …