title: Manipulation of Homologous and Homoeologous Chromosome Recombination in Wheat.
abstract: Given the sizes of the three genomes in wheat (A, B, and D) and a limited number of chiasmata formed in meiosis, recombination by crossing-over is a very rare event. It is also restricted to very similar homologues; the pairing homoeologous (Ph) system of wheat prevents differentiated chromosomes from pairing and crossing-over. This chapter presents an overview and describes several systems by which the frequency or density of crossing-over can be increased, both in homologues and homoeologues. It also presents the standard system of E.R. Sears for engineering alien chromosome transfers into wheat.
authors: Department of Botany and Plant Sciences, University of California, Riverside, CA, 92521, USA. adam.lukaszewski@ucr.edu.
authors: Adam J
authors: AJ
authors: Lukaszewski
mesh_terms: D032461:Chromosomes, Plant; D003434:Crossing Over, Genetic; D005818:Genetic Engineering / Q000379:methods*; D008540:Meiosis; D014908:Triticum / Q000235:genetics*
keywords: Crossing-over; Recombination stringency; Structural chromosome variants; The Ph system; Triticum aestivum