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Chromosomal Evolution And Apomixis In The Cruciferous Tribe Boechereae, Terezie Mandáková, Petra Hloušková, Michael D. Windham, Thomas Mitchell-Olds, Kaylynn Ashby, Bo Price, John Carman, Martin A. Lysak
Chromosomal Evolution And Apomixis In The Cruciferous Tribe Boechereae, Terezie Mandáková, Petra Hloušková, Michael D. Windham, Thomas Mitchell-Olds, Kaylynn Ashby, Bo Price, John Carman, Martin A. Lysak
Plants, Soils, and Climate Faculty Publications
The mustard family (Brassicaceae) comprises several dozen monophyletic clades usually ranked as tribes. The tribe Boechereae plays a prominent role in plant research due to the incidence of apomixis and its close relationship to Arabidopsis. This tribe, largely confined to western North America, harbors nine genera and c. 130 species, with >90% of species belonging to the genus Boechera. Hundreds of apomictic diploid and triploid Boechera hybrids have spurred interest in this genus, but the remaining Boechereae genomes remain virtually unstudied. Here we report on comparative genome structure of six genera (Borodinia, Cusickiella, Phoenicaulis, …
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
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 …