Extra Early-Flowering (exe) Mutants in Einkorn Wheat Generated by Heavy-Ion Beam Irradiation [chapter]

Aiko Nishiura, Yusuke Kazama, Tomoko Abe, Nobuyuki Mizuno, Shuhei Nasuda, Koji Murai
2015 Advances in Wheat Genetics: From Genome to Field  
Four extra early-heading mutants, named extra early-fl owering1 ( exe1 ), exe2 , exe3 , and exe4 , were identifi ed in diploid einkorn wheat ( Triticum monococcum L.) following heavy-ion beam mutagenesis. Based on their phenotypes in the fi eld, the four exe mutants were classifi ed into two groups: Type I (moderately extra early-heading type; exe1 and exe3 ) and Type II (extremely extra early-heading type; exe2 and exe4 ). Analysis of VERNALIZATION 1 ( VRN1 ), a fl owering promoter gene,
more » ... that it was more highly expressed at earlier stages of vegetative growth in Type II mutants than in Type I mutants. Our analyses indicate that the difference in earliness between Type I and Type II mutants is associated with differences in the expression level of VRN1 .
doi:10.1007/978-4-431-55675-6_19 fatcat:peh7fgbesjeordukpyrei6q35i