title: Polyembryony in wheat--agropyron hybrids (2n equal 42) and (2n equal 56).
mesh_terms: D000782:Aneuploidy; D002875:Chromosomes; D003433:Crosses, Genetic; D004171:Diploidy; D005787:Gene Frequency; D006238:Haploidy; D006824:Hybridization, Genetic; D010944:Plants; D014908:Triticum